Intersil ISL68124 Digital dual output, 7-phase configurable pwm Datasheet

DATASHEET
Digital Dual Output, 4-Phase Configurable, PWM
Controller with Adaptive Voltage Scaling (AVSBus) Bus
ISL68134
Features
The ISL68134 is a digital dual output, flexible multiphase
(X+Y ≤ 4) PWM controller with AVSBus (Adaptive Voltage Scaling
interface). Either output can be configured to support any desired
phase assignments up to a maximum of 4 phases across the 2
outputs (X+Y). For example, 3+1, 2+2, 2+1, or even a single
output operation as a 4+0 configuration are supported. The
flexible phase arrangement, combined with PMBus and AVSBus
interfaces, allows the device to support any demanding power
supply requirement. The ISL68134 with AVSBus complements
PMBus by providing a common interface that accelerates
point-to-point communication between the controller and the load
to statically and dynamically control processor voltage, thus
delivering a balanced and power efficient solution. AVSBus can be
used exclusively once the device is configured via PMBus. The
ISL68134 utilizes Intersil’s proprietary linear synthetic digital
current modulation scheme to achieve the industry’s best
combination of transient response and ease of tuning while
addressing the challenges of modern multiphase designs.
• PMBus™ 1.3 and AVSBus compliant
- Telemetry - VIN, VOUT, IOUT, power IN/OUT, temperature
and various fault status registers
- Individual AVSBus interface enables high speed voltage
changes
Device configuration and telemetry monitoring is accomplished
using Intersil's intuitive PowerNavigator™ GUI. The ISL68134
device supports on-chip nonvolatile memory to store various
configuration settings that are user selectable via pin-strap, giving
system designers increased power density to configure and
deploy multiple configurations. The device supports an automatic
phase add/drop feature to allow maximum efficiency across all
load ranges. Thresholds for automatic phase add/drop are user
programmable using the powerful PowerNavigator GUI.
The ISL68134 supports a comprehensive fault management
system to enable the design of highly reliable systems. From a
multitiered overcurrent protection scheme, to the configurable
power-good and output overvoltage/undervoltage fault
thresholds and temperature monitoring, virtually any need is
accommodated.
• Advanced linear digital modulation scheme
- Zero latency synthetic current control for excellent HF
current balance
- Dual edge modulation for fastest transient response
• Auto phase add/drop for excellent load vs efficiency profile
• Flexible phase configuration
- 4+0, 3+1, 2+2 phase operation
- Operation using less than 4 phases between 2 outputs is
also supported
• Diode braking for overshoot reduction
• Differential remote voltage sensing supports ±0.5% closed
loop system accuracy over load, line and temperature
• Highly accurate current sensing for excellent load line
regulation and accurate OCP
- Supports ISL99227 60A smart power stage
- Supports DCR sense with integrated temperature
compensation
• Comprehensive fault management enables high reliability
systems
- Pulse-by-pulse phase current limiting
- Total output current protection
- Output and input OV/UV
- Open voltage sense detect
- Black box recording capability for faults
With minimal external components, easy configuration, robust
fault management and highly accurate regulation capability,
implementing a high performance multiphase regulator has
never been easier.
• Intuitive configuration via PowerNavigator™ GUI
- NVM to store up to 8 configurations
Applications
Related Literature
• Networking equipment
• For a full list of related documents, visit our website
- ISL68134 product page
• Telecom/datacom equipment
• Pb-free (RoHS compliant)
• Server/storage equipment
• Point-of-load power supply (Memory, DSP, ASIC, FPGA)
September 28, 2016
FN8817.0
1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 1-888-468-3774 |Copyright Intersil Americas LLC 2016. All Rights Reserved
Intersil (and design) and PowerNavigator are trademarks owned by Intersil Corporation or one of its subsidiaries.
All other trademarks mentioned are the property of their respective owners.
ISL68134
Table of Contents
Ordering Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Pin Configuration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Functional Pin Descriptions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Driver, DrMOS and Smart Power Stage Recommendation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Internal Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Typical Application: 2+2 Configuration with ISL99227 SPS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Typical Application: 3+1 Configuration with ISL99227 SPS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Typical Application: 2+2 Configuration with DCR Sensing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Absolute Maximum Ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Thermal Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Recommended Operating Conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Electrical Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Typical Performance Curves . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Functional Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
PWM Modulation Scheme . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
PMBus Address Selection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Phase Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Automatic Phase Add and Drop . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Output Voltage Configuration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Switching Frequency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Current Sensing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Temperature Sensing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Temperature Compensation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Lossless Input Current and Power Sensing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Voltage Regulation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Current Feedback . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Power-On Reset (POR) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Soft-Start Delay and Ramp Times . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Stored Configuration Selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
11
11
11
12
12
12
12
13
13
14
14
15
15
15
15
15
16
Fault Monitoring and Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Power-Good Signals. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Output Voltage Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Output Current Protection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Smart Power Stage OC Fault Detect . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Thermal Monitoring and Protection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
16
16
16
16
18
18
Layout and Design Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
PMBus™ Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
PMBus Protocol . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
PMBus™ Command Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
PMBus™ Use Guidelines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
PMBus™ Data Formats . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
PMBus™ Command Detail . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Adaptive Voltage Scaling (AVSBus) Functionality and Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
AVSBus Master Send Subframe. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
AVSBus Slave Response Subframe. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
AVSBus Command Detail . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
Revision History. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
About Intersil . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
Package Outline Drawing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
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FN8817.0
September 28, 2016
ISL68134
Ordering Information
PART NUMBER
(Notes 1, 2, 3)
PART
MARKING
ISL68134IRAZ
ISL68134 IRZ
ISL68134-31P-EV1Z
Evaluation Board
TEMP. RANGE
(°C)
-40 to +85
PACKAGE
(RoHS COMPLIANT)
40 Ld 5x5 TQFN
PKG.
DWG. #
L40.5x5D
NOTES:
1. Add “-T” suffix for 6k unit or “-T7A” suffix for 250 unit tape and reel options. Please refer to TB347 for details on reel specifications.
2. These Intersil Pb-free plastic packaged products employ special Pb-free material sets, molding compounds/die attach materials and 100% matte tin
plate plus anneal (e3 termination finish, which is RoHS compliant and compatible with both SnPb and Pb-free soldering operations). Intersil Pb-free
products are MSL classified at Pb-free peak reflow temperatures that meet or exceed the Pb-free requirements of IPC/JEDEC J STD-020.
3. For Moisture Sensitivity Level (MSL), please see product information page for ISL68134. For more information on MSL, please see tech brief TB363.
TABLE 1. KEY DIFFERENCES BETWEEN FAMILY OF PARTS
PART NUMBER
PHASE CONFIGURATION
OUTPUT X/OUTPUT Y
SPECIFICATION SUPPORTED
PACKAGE
ISL68137
X+Y ≤ 7
PMBus/AVSBus
QFN 48 Ld, 6x6mm
ISL68134
X+Y ≤ 4
PMBus/AVSBus
TQFN 40 Ld, 5x5mm
ISL68127
X+Y ≤ 7
PMBus
QFN 48 Ld, 6x6mm
ISL68124
X+Y ≤ 4
PMBus
TQFN 40 Ld, 5x5mm
Pin Configuration
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DNC
DNC
DNC
SA
VCCS
VCC
TMON1
TMON0
VSEN0
RGND0
ISL68134
(40 LD TQFN)
TOP VIEW
40
39
38
37
36
35
34
33
32
31
PWM0
1
30 CS0
PWM1
2
29 CSRTN0
PWM2
3
28 CS1
PWM3
4
27 CSRTN1
AVS_CLK
5
26 CS2
GND
(EPAD)
25 CSRTN2
22 RGND1
DNC
10
21 VSEN1
3
11
12
13
14
15
16
17
18
19
20
VINSEN
9
CONFIG
DNC
SALRT
23 CSRTN3
SDA
8
SCL
AVS_VDDIO
PG1
24 CS3
PG0
7
TWARN
AVS_MDA
EN1
6
EN0
AVS_SDA
FN8817.0
September 28, 2016
ISL68134
Functional Pin Descriptions
PIN NUMBER
4, 3, 2, 1
Refer to Table 4 on page 19 for design layout considerations.
PIN NAME
DESCRIPTION
PWM[3:0] Pulse width modulation outputs. Connect these pins to the PWM input pins of 3.3V logic compatible Intersil smart power
stages, driver IC(s) or power stages.
5
AVS_CLK
AVSBus clock input pin. Connect to ground if not used.
6
AVS_SDA
AVSBus data output pin. Leave open if not used.
7
AVS_MDA AVSBus data input pin. Connect to ground if not used.
8
AVS_VDDIO AVSBus reference voltage input pin. Leave open if not used.
9, 10, 38, 39,
40
DNC
Do not connect any signals to these pins.
11
EN0
Input pin used for enable control of Output 0. Active high. Connect to ground if not used.
12
EN1
Input pin used for enable control of Output 1. Active high. Connect to ground if not used.
13
TWARN
14
PG0
Open-drain power-good indicators for Output 0. Maximum pull-up voltage is VCC.
15
PG1
Open-drain power-good indicators for Output 1. Maximum pull-up voltage is VCC.
16
SCL
Serial clock signal pin for SMBus interface. Maximum pull-up voltage is VCC.
17
SDA
Serial data signal pin for SMBus interface. Maximum pull-up voltage is VCC.
18
SALRT
Serial alert signal pin for SMBus interface. Maximum pull-up voltage is VCC.
19
CONFIG
Configuration ID selection pin. See Table 3 on page 16 for more details.
20
VINSEN
Input voltage sense pin. Connect to VIN through a resistor divider (typically 40.2k/10k) with a 10nF decoupling capacitor.
21
VSEN1
Positive differential voltage sense input for Output 1. Connect to positive remote sensing point. Connect to ground if not
used.
22
RGND1
Negative differential voltage sense input for Output 1. Connect to negative remote sensing point. Connect to ground if not
used.
Thermal warning flag. This open-drain output will be pulled low in the event of a sensed over-temperature at TMON pins
without disabling the regulators. Maximum pull-up voltage is VCC.
23, 25, 27, 29 CSRTN[3:0] The CS and CSRTN pins are current sense inputs to individual phase differential amplifiers. Unused phases should have
their respective current sense inputs grounded. The ISL68134 supports smart power stage, DCR and resistor sensing.
24, 26, 28, 30
CS[3:0] Connection details depend on current sense method chosen.
31
RGND0
Negative differential voltage sense input for Output 0. Connect to negative remote sensing point. Connect to ground if not
used.
32
VSEN0
Positive differential voltage sense input for Output 0. Connect to positive remote sensing point. Connect to ground if not
used.
33
TMON0
Input pin for external temperature measurement at Output 0. Supports diode based temperature sensing as well as smart
power stage sensing. Refer to “Temperature Compensation” on page 14 for more information.
34
TMON1
Input pin for external temperature measurement at Output 1. Supports diode based temperature sensing as well as smart
power stage sensing. Refer to “Temperature Compensation” on page 14 for more information.
35
VCC
Chip primary bias input. Connect this pin directly to a +3.3V supply with a high quality MLCC bypass capacitor.
36
VCCS
Internally generated 1.2V LDO logic supply from VCC. Decouple with 4.7µF or greater MLCC (X5R or better).
37
SA
EPAD
GND
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PMBus™ Address selection pin. See Table 2 on page 12 for more details.
Package pad serves as GND return for all chip functions. Connect directly to system GND plane with multiple thermal vias.
4
FN8817.0
September 28, 2016
ISL68134
Driver, DrMOS and Smart Power Stage Recommendation
QUIESCENT CURRENT
(mA)
GATE
DRIVE VOLTAGE
(V)
NUMBER OF
DRIVERS
ISL99227
4.85
5
Single
60A, 5x5 smart power stage
ISL99140
0.19
5
Single
40A, 6x6 DrMOS
ISL6596
0.19
5
Single
Connect ISL6596 VCTRL to 3.3V
INTERSIL PART
NUMBER
COMMENTS
Internal Block Diagram
PG0
CS0
CSRTN0
ADC
CYCLECYCLE OCP
ADC
CYCLECYCLE OCP
ADC
CYCLECYCLE OCP
ADC
CYCLECYCLE OCP
STATUS
MANAGER
PG1
TWARN
CS1
CSRTN1
CS2
CSRTN2
CS3
CSRTN3
EN0
LOOP
MANAGER
EN1
CONFIG
CPU
SA
SUMMED
OCP
ISUM0
NVM
CURRENT
AC FB
VDROOP
SUMMED
OCP
BLACKBOX
ISUM1
VSEN0
RGND0
VSA
DIGITAL
DUAL EDGE
MODULATOR
PID
ADC
OV
Current
AC FB
VDROOP
VSEN1
RGND1
VSA
UV
+
+
PID
ADC
OV
VINSEN
UV
+
+
TMON0
TMON1
ADC
VCC
LDO
FAULT AND
TELEMETRY
MANAGER
VCCS
DIGITAL
DUAL EDGE
MODULATOR
P
H
A
S
E
M
A
N
A
G
E
R
PWM0
PWM1
PWM2
PWM3
PMBUS
INTERFACE
SCL
SDA
SALRT
AVSBUS
INTERFACE
AVS_CLK
AVS_MDA
AVS_SDA
AVS_VDDIO
FIGURE 1. INTERNAL BLOCK DIAGRAM
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ISL68134
Typical Application: 2+2 Configuration with ISL99227 SPS
RGND0
VSEN 0
1k
EN0
VCCS
PG0
4.7µF
100
TMON0
ISL99227
VCC
3.3V
PWM0
PWM
100
CS0
0.1µF
CSRTN0
IMON
REFIN
470pF
VIN
BOOT
12V
0.1µF
2x22µF
PHASE
FAULT#
12V
GND
SW
ISL99227
40.2k
PWM1
10nF
CSRTN1
PWM
100
CS1
0.1µF
IMON
REFIN
470pF
5V
PVCC
VCC
TMON
VINSEN
10k
5V
PVCC
VCC
TMON
470pF
4.7µF
12V
VIN
BOOT
VOUT0
C OUT
0.1µF
2x22µF
PHASE
ISL68134
FAULT#
GND
SW
ISL99227
AVS_CLK
AVS_SDA
PWM
100
CS2
AVS_MDA
0.1µF
CSRTN2
470pF
AVS_VDDIO
VIN
IMON
REFIN
5V
PVCC
VCC
TMON
PWM2
BOOT
12V
0.1µF
2x22µF
PHASE
FAULT#
TWARN
GND
SW
ISL99227
SCL
CS3
SDA
CSRTN3
PWM
100
0.1µF
470pF
IMON
REFIN
5V
PVCC
VCC
TMON
PWM3
12V
VIN
BOOT
0.1µF
2x22µF
PHASE
SALRT
FAULT#
GND
SW
SA
TMON1
C OUT
VOUT1
470pF
CONFIG
PG1
1k
RGND1
EN1
VSEN 1
FIGURE 2. TYPICAL APPLICATION: 2+2 CONFIGURATION WITH ISL99227 SPS
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ISL68134
Typical Application: 3+1 Configuration with ISL99227 SPS
RGND0
VSEN 0
1k
EN0
VCCS
PG0
4.7µF
100
TMON0
ISL99227
VCC
3.3V
PWM0
CSRTN0
PWM
100
CS0
0.1µF
470pF
IMON
REFIN
5V
PVCC
VCC
TMON
470pF
4.7µF
VIN
BOOT
12V
0.1µF
2x22µF
PHASE
FAULT#
12V
SW
ISL99227
40.2k
PVCC
VCC
TMON
VINSEN
PWM1
10k
GND
10nF
100
CS1
CSRTN1
PWM
0.1µF
IMON
REFIN
470pF
5V
VOUT0
12V
VIN
BOOT
COUT
0.1µF
2x22µF
PHASE
ISL68134
FAULT#
GND
SW
ISL99227
PWM2
AVS_SDA
PWM
100
CS2
AVS_MDA
0.1µF
CSRTN2
IMON
REFIN
470pF
AVS_VDDIO
5V
PVCC
VCC
TMON
AVS_CLK
12V
VIN
BOOT
0.1µF
2x22µF
PHASE
FAULT#
TWARN
GND
SW
ISL99227
SCL
CS3
SDA
CSRTN3
PWM
100
0.1µF
470pF
IMON
REFIN
5V
PVCC
VCC
TMON
PWM3
12V
VIN
BOOT
0.1µF
2x22µF
PHASE
SALRT
FAULT#
GND
SW
SA
TMON1
COUT
VOUT1
470pF
CONFIG
PG1
1k
EN1
RGND1
VSEN 1
FIGURE 3. TYPICAL APPLICATION: 3+1 CONFIGURATION WITH ISL99227 SPS
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ISL68134
Typical Application: 2+2 Configuration with DCR Sensing
RGND0
VSEN 0
1k
EN0
VCCS
PG0
THDN
0.1µF
PWM0
BOOT
ISL99140
PHASE
PWM
5V
PVCC
VCC
EN
VIN
12V
2x22µF
SW
GND
VCC
3.3V
CS0
4.7µF
CSRTN0
TMON0
12V
40.1k
VINSEN
PVCC
VCC
EN
THDN
10k
10nF
0.1µF
PWM
PWM1
TWARN
BOOT
PHASE
ISL99140
5V
VIN
12V
VOUT0
COUT
2x22µF
SW
GND
CS1
CSRTN1
SCL
SDA
THDN
SALRT
0.1µF
AVS_SDA
ISL99140
PHASE
PWM
PWM2
AVS_CLK
BOOT
5V
PVCC
VCC
EN
ISL68134
12V
VIN
2x22µF
SW
GND
VOUT1
CS2
COUT
CSRTN2
AVS_MDA
EN
THDN
SA
0.1µF
PWM3
CONFIG
BOOT
ISL99140
PHASE
PWM
5V
PVCC
VCC
AVS_VDDIO
VIN
12V
2x22µF
SW
GND
CS3
CSRTN3
TMON1
PG1
1k
EN1
RGND1
VSEN 1
FIGURE 4. TYPICAL APPLICATION: 2+2 CONFIGURATION WITH DCR SENSING
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ISL68134
Absolute Maximum Ratings
Thermal Information
VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +4.3V
VCCS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +1.6V
All Other Pins . . . . . . . . . . . . . . . . . . . . . . . . . . . .(GND - 0.3V) to VCC + 0.3V
ESD Rating:
Human Body Model (Tested per JS-001-2014) . . . . . . . . . . . . . . . . . . 2kV
Charged Device Model (Tested per JS-001-2014) . . . . . . . . . . . . . . . 1kV
Latch-Up (Tested per JESD-78D; Class 2, Level A) . . . . . . . . . . . . . . 100mA
Thermal Resistance (Notes 4, 5)
JA (°C/W) JC (°C/W)
40 Ld 5x5 TQFN Package . . . . . . . . . . . . . .
30
1.2
Maximum Junction Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . .+150°C
Maximum Storage Temperature Range . . . . . . . . . . . . . .-65°C to +150°C
Pb-Free Reflow Profile . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . see TB493
Recommended Operating Conditions
Supply Voltage, VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +3.3V ±5%
Ambient Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -40°C to +85°C
Output Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0V to 3.05V
CAUTION: Do not operate at or near the maximum ratings listed for extended periods of time. Exposure to such conditions may adversely impact product
reliability and result in failures not covered by warranty.
NOTES:
4. JA is measured in free air with the component mounted on a high effective thermal conductivity test board with “direct attach” features. See TB379.
5. For JC, the “case temp” location is the center of the exposed metal pad on the package underside.
Electrical Specifications Recommended operating conditions, VCC = 3.3V, unless otherwise specified. Boldface limits apply across the
operating temperature range -40°C to +85°C.
PARAMETER
TEST CONDITIONS
MIN
(Note 7)
TYP
MAX
(Note 7)
UNIT
VCC SUPPLY CURRENT
Nominal Supply Current
VCC = 3.3VDC; EN1/2 = VIH, fSW = 400kHz
Shutdown Supply Current
VCC = 3.3VDC; EN1/2 = 0V, no switching
63
mA
11.5
mA
VCCS LDO SUPPLY
Output Voltage
1.20
Maximum Current Capability
Excluding internal load
1.25
1.30
50
V
mA
POWER-ON RESET AND INPUT VOLTAGE LOCKOUT
VCC Rising POR Threshold
2.7
VCC Falling POR Threshold
2.9
1.0
Enable (EN0 and EN1) Input High Level
V
2.3
Enable (EN0 and EN1) Input LOW to HIGH Ramp
Delay (TON_DELAY)
V
200
POR to Initialization Complete Time
V
µs
30
40
ms
0.25
3.05
V
Set-point 0.8V to 3.05V
-0.5
0.5
%
Set-point 0.25V to <0.8V
-5
5
mV
OUTPUT VOLTAGE CHARACTERISTICS (Note 6)
Output Voltage Adjustment Range
Output Voltage Set-Point Accuracy
VOLTAGE SENSE AMPLIFIER
Open Sense Current
Only during open pin check of initialization
22
µA
Input Impedance (VSEN - RGND)
200
kΩ
Maximum Common-Mode Input
VCC - 0.2
V
Maximum Differential Input (VSEN - RGND)
3.05
V
CURRENT SENSE AND OVERCURRENT PROTECTION
Maximum Common-Mode Input (SPS mode)
CSRTNx - GND
1.6
V
Maximum Common-Mode Input (DCR mode)
CSRTNx - GND
3.3
V
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ISL68134
Electrical Specifications Recommended operating conditions, VCC = 3.3V, unless otherwise specified. Boldface limits apply across the
operating temperature range -40°C to +85°C. (Continued)
PARAMETER
TEST CONDITIONS
Current Sense Accuracy
ISEN to ADC accuracy
MIN
(Note 7)
TYP
-2
Average Overcurrent Threshold Resolution
MAX
(Note 7)
UNIT
2
%
0.1
A
0.01
mV/A
DIGITAL DROOP
Droop Resolution
OSCILLATORS
Accuracy of Switching Frequency Setting
When set to 500kHz
Accuracy of Switching Frequency Setting
Switching Frequency Range
480
500
520
kHz
-4
+4
%
200
1000
kHz
SOFT-START RATE AND VOLTAGE TRANSITION RATE
Minimum Soft-Start Ramp Rate
Programmable minimum rate
Maximum Soft-Start Ramp Rate
Programmable maximum rate
Soft-Start Ramp Rate Accuracy
20
10
-4
Minimum Transition Rate
Programmable minimum rate
Maximum Transition Rate
Programmable maximum rate
Transition Rate Accuracy
µs
ms
4
0.1
mV/µs
100
-4
%
mV/µs
4
%
0.4
V
1
µA
PWM OUTPUT
PWMx Output High Level
IOUT = 4mA
PWMx Output Low Level
IOUT = 4mA
PWMx Output Tri-State IOL
VOH = VCC
PWMx Output Tri-State IOh
VOL = 0V
VCC - 0.4
V
-1
µA
THERMAL MONITORING AND PROTECTION
Temperature Sensor Range
-50
Temperature Sensor Accuracy
TMON to ADC accuracy
TWARN Output Low Impedance
-4.5
4
TWARN Hysteresis
9
150
°C
4.5
%
13
Ω
3
°C
POWER-GOOD AND PROTECTION MONITORS
PG Output Low Voltage
IOUT = 8mA load
PG Leakage Current
With pull-up resistor externally connected to VCC
0.5
0.4
V
1
µA
Overvoltage Protection Threshold Resolution
1
mV
Undervoltage Protection Threshold Resolution
1
mV
VCC - 0.2
V
Overvoltage Protection Threshold When Disabled
INPUT VOLTAGE SENSE
Input Voltage Accuracy
VINSEN to ADC accuracy
-2.5
Input Voltage Protection Threshold Resolution
2.5
1
%
mV
AVSBus
AVS VDDIO Input Voltage Range
0.90
AVS CLK, MDA, Input High Level
0.6 * VDDIO
AVS CLK, MDA, Input Low Level
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3.63
0.4 * VDDIO
10
V
V
V
FN8817.0
September 28, 2016
ISL68134
Electrical Specifications Recommended operating conditions, VCC = 3.3V, unless otherwise specified. Boldface limits apply across the
operating temperature range -40°C to +85°C. (Continued)
PARAMETER
MIN
(Note 7)
TEST CONDITIONS
AVS SDA, Output High Level
MAX
(Note 7)
TYP
UNIT
0.8 * VDDIO
V
AVS SDA, Output Low Level
AVS CLK Frequency Range
0.2 * VDDIO
V
50
MHz
5
SMBus/PMBus
SALERT, SDA Output Low Level
IOUT = 4mA
0.4
SCL, SDA Input High/Low Threshold
SCL, SDA Input Hysteresis
SCL Frequency Range
V
1.25
V
2
mV
0.05
2.00
MHz
NOTES:
6. These parts are designed and adjusted for accuracy with all errors in the voltage loop included.
7. Compliance to datasheet limits is assured by one or more methods: production test, characterization and/or design.
0.08
0.05
0.07
0.04
0.06
0.03
ICC (A)
ICC (A)
Typical Performance Curves
0.05
0.04
0.02
0.01
0.03
-40
-20
0
20
40
60
80
100
AMBIENT TEMPERATURE (oC)
FIGURE 5. NOMINAL SUPPLY CURRENT vs TEMPERATURE
Functional Description
Overview
The ISL68134 is a digital dual output 4-phase PWM controller that
can be programmed for a single output 4+0, dual output 3+1 or
2+2 phase operation. Operation using less than 4 phases
between 2 outputs is also supported. Existing digital multiphase
solutions utilize analog comparator based schemes (nonlinear) to
bolster the inadequate transient response common to many
digital multiphase solutions. The ISL68134 uses a linear voltage
regulation scheme to address transient loads. As a result, it is
much easier for users to configure and validate their designs when
compared with nonlinear schemes. By combining a proprietary low
noise and zero latency digital current sense scheme with cutting
edge digital design techniques, Intersil is able to meet transient
demands without resorting to nonlinear schemes. In addition, the
ISL68134 can store up to 8 user configurations in NVM and allows
the user to select the desired configuration via pin-strap (CONFIG).
The result is a system that is easy to configure and deploy.
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0
-40
-20
0
20
40
60
80
100
AMBIENT TEMPERATURE (oC)
FIGURE 6. SHUTDOWN SUPPLY CURRENT vs TEMPERATURE
A number of performance enhancing features are supported in
the ISL68134. These include AVSBus control, diode braking,
automatic phase dropping, DCR/resistor/smart power stage
current sense support, load line regulation and multiple
temperature sensing options.
To facilitate configuration development, the PowerNavigator™
GUI provides a step-by-step arrangement for setup and
parametric adjustment. Once a configuration has been set, the
user may employ PowerNavigator™ to monitor telemetry or use
direct PMBus interface based on the supported command set.
PWM Modulation Scheme
The ISL68134 uses Intersil's proprietary linear synthetic current
modulation scheme to improve transient performance. This is a
unique constant frequency, dual edge PWM modulation scheme
with both PWM leading and trailing edges being independently
moved to give the best response to transient loads. Current
balance is an inherent part of the regulation scheme. The
modulation scheme is capable of overlapping pulses should the
load profile demand such operation. In addition, the modulator is
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ISL68134
capable of adding or removing pulses from a given cycle in
response to regulation demands while still managing maximum
average frequency to safe levels. For DC load conditions the
operating frequency is constant.
When communicating with multiple PMBus devices on a single
bus, each device must have its own unique address so the host
can distinguish between the devices. The device address can be
set using a 1% resistor on the SA pin according to the pin-strap
options listed in Table 2.
I3
I1
EFFICIENCY (%)
PMBus Address Selection
I2
TABLE 2. RESISTOR VALUES TO ADDRESS MAPPING
R SA
(Ω)
PMBus
ADDRESS
R SA
(Ω)
PMBus
ADDRESS
0
60h
1500
52h
FIGURE 7. EFFICIENCY vs PHASE NUMBER
180
63h
1800
53h
330
66h
2200
56h
470
67h
2700
57h
680
42h
3300
5Ah
820
43h
3900
5Bh
Phases are dropped one at a time with a user programmed drop
delay between drop events. As an example, suppose the delay is
set to 1ms and 3 phases are active. Should the load suddenly
drop to a level needing only 1 phase, the ISL68134 will begin by
dropping a phase after 1ms. An additional phase will be dropped
each 1ms thereafter until only 1 phase remains.
1000
46h
4700
5Eh
1200
47h
5600
5Fh
Phase Configuration
The ISL68134 supports up to two regulated outputs through four
configurable phases. Either output is capable of controlling up to
four phases in any arbitrary mix. Phase assignments are
accomplished via the PowerNavigator™ GUI.
While the device supports arbitrary phase assignment, it is good
practice to assign phases to Output 1 in descending sequential
numerical order starting from Phase 3. For example, a 3-phase
rail could consist of Phases 3, 2 and 1. For Output 0, phases
would be assigned starting from Phase 0 in ascending sequential
numerical order.
Automatic Phase Add and Drop
In order to produce the most optimal efficiency across a wide
range of output loading, the modulator supports automatic
dropping or adding of phases. Use of automatic phase dropping
is optional. If automatic phase dropping is enabled, the number
of active phases at any time is determined solely by load current.
During operation, phases of Output 1 will drop beginning with the
lowest phase number assigned. Phase dropping begins with the
highest assigned phase number. Figure 7 illustrates the typical
characteristic of efficiency vs load current vs phase count.
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0
10
20
30
40
50
LOAD (A)
60
70
80
90
In addition to the described load current add/drop thresholds,
the fast phase add function provides a very rapid response to
transient load conditions. This feature continuously monitors the
system regulation error and should it exceed the user set
threshold, all dropped phases will be readied for use. In this way,
there is no delay should all phases be needed to support a load
transient. The fast phase add threshold is set in the
PowerNavigator™ GUI. Output current threshold for adding and
dropping phases can also be configured.
To ensure dropped phases have sufficient boot capacitor charge
to turn on the high-side MOSFET after a long period of disable, a
boot refresh circuit turns on the low-side MOSFET of each
dropped phase to refresh the boot capacitor. Frequency of the
boot refresh is programmable via PowerNavigator™.
Output Voltage Configuration
Output voltage set points and thresholds for each output can be
configured with PowerNavigator™ GUI. Parameters such as
output voltage, VOUT margin high/low and VOUT OV/UV faults
thresholds can be configured with GUI. Additionally, output
voltage and margin high/low can be adjusted during regulation
via PMBus command VOUT_COMMAND, VOUT_MARGIN_HIGH
and VOUT_MARGIN_LOW for further tuning. The following VOUT
relationships must be maintained for correct operation:
VOUT_OV_FAULT_LIMIT > VOUT_COMMAND
(VOUT_MARGIN_HIGH and VOUT_MARGIN_LOW, if used) >
VOUT_UV_FAULT_LIMIT. Additionally, the VOUT commands are
bounded by VOUT_MAX and VOUT_MIN to provide protection
against incorrect set points being sent to the device. The
ISL68134 also incorporates AVSBus functionality for high speed
changes to the VOUT target.
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ISL68134
Switching Frequency
RESISTIVE SENSING
Switching frequency is user configurable over a range of 200kHz
to 1MHz.
For more accurate current sensing, a dedicated current sense
resistor RSENSE in series with each output inductor can serve as the
current sense element. This technique, however, reduces the overall
converter efficiency due to the additional power loss on the current
sense element RSENSE.
Current Sensing
The ISL68134 supports DCR, resistor and smart power stage
current sensing. Connection to the various sense elements is
accomplished via the CS and CSRTN pins. Current sensing inputs
are high impedance differential inputs to reject noise and ground
related inaccuracies.
To accommodate a wide range of effective sense resistance,
information about the effective sense resistance and required
per phase current capability is utilized by the GUI to properly
configure the current sense circuitry.
RSENSE ESL
VOUT
VPHASE
ESL
 RC
RSENSE
R
IC
CSRTNn
C
INDUCTOR DCR SENSING
CSn
DCR sensing takes advantage of the fact that an inductor
winding has a resistive component (DCR) that will drop a voltage
proportional to the inductor current. Figure 8 on page 13 shows
that the DCR is treated as a lumped element with one terminal
inaccessible for measurement. Fortunately, a simple R-C network
as shown in Figure 9 is capable of reproducing the hidden DCR
voltage. By simply matching the R-C time constant to the L/DCR
time constant, it is possible to precisely recreate the DCR voltage
across the capacitor. This means that VDCR(t) = VC(t), thus
preserving even the high frequency characteristic of the DCR
voltage.
L
FIGURE 9. SENSE RESISTOR IN SERIES WITH INDUCTOR
A current sensing resistor has a distributed parasitic inductance,
known as ESL (Equivalent Series Inductance, typically less than
1nH). Consider the ESL as a separate lumped quantity, as shown
in Figure 9. The phase current IL, flowing through the inductor,
will also pass through the ESL. Similar to DCR sensing described
previously, a simple R-C network across the current sense
resistor extracts the RSENSE voltage. Simply match the
ESL/RSENSE time constant to the R-C time constant.
Figure 10 shows the sensed waveforms with and without
matching RC when using resistive sense. PCB layout should be
treated similar to that described for DCR sense.
DCR
VOUT
VPHASE
CURRENT
SENSE
R
MATCHING RC
L
 R C
DCR
IC
CSRTNn
CURRENT
SENSE
C
CSn
FIGURE 8. DCR SENSING CONFIGURATION
Modern inductors often have such low DCR values that the
resulting signal is <10mV. To avoid noise problems, care must be
taken in the PCB layout to properly place the R-C components and
route the differential lines between controller and inductor.
Figure 8 graphically shows one PCB design method that places
the R component near the inductor VPHASE and the C component
very close to the IC pins. This minimizes routing of the noisy
VPHASE and maximizes filtering near the IC. Route the lines
between the inductor and IC as a pair on a single layer directly to
the controller. Care must be taken to avoid routing the pair near
any switching signals including Phase, PWM etc. This is the
method used by Intersil on evaluation board designs.
This method is sensing the resistance of a metal winding where
the DCR value will increase with temperature. This must be
compensated or the sensed (and reported) current will increase
with temperature. In order to compensate the temperature effect,
the ISL68134 provides temperature sensing options and an
internal methodology to apply the correction.
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NO MATCHING RC
FIGURE 10. VOLTAGE ACROSS R WITH AND WITHOUT RC
L/DCR OR ESL/RSEN MATCHING
Assuming the compensator design is correct, Figure 11 on
page 14 shows the expected load transient response waveforms if
L/DCR or ESL/RSEN is matching the R-C time constant. When the
load current IOUT has a square change, the output voltage VOUT
also has a square response, except for the potential overshoot at
load release. However, there is always some uncertainty in the true
parameter values involved in the time constant matching and
therefore fine-tuning is generally required.
If the R-C timing constant is too large or too small, VC(t) will not
accurately represent real-time IOUT(t) and will worsen the
transient response. Figure 12 on page 14 shows the load
transient response when the R-C timing constant is too small. In
this condition, VOUT will sag excessively upon load insertion and
may create a system failure or early overcurrent trip. Figure 13
on page 14 shows the transient response when the R-C timing
constant is too large. VOUT is sluggish in drooping to its final
value. Use these general guides if fine-tuning is needed.
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ISL68134
IOUT
Sensed temperature is utilized in the system for faults, telemetry,
and temperature compensation of sensed current.
Temperature Compensation
VOUT
FIGURE 11. DESIRED LOAD TRANSIENT RESPONSE WAVEFORMS
IO U T
VOUT
FIGURE 12. LOAD TRANSIENT RESPONSE WHEN R-C TIME
CONSTANT IS TOO SMALL
IOUT
VOUT
FIGURE 13. LOAD TRANSIENT RESPONSE WHEN R-C TIME
CONSTANT IS TOO LARGE
SPS CURRENT SENSING
SPS current sense is accomplished by sensing each SPS IMON
output individually using VCCS as a common reference. Connect
all SPS IREF input pins and all ISL68134 CSRTNn input pins
together and tie them to VCCS, then connect the SPS IMONn
output pins to the corresponding ISL68134 CSn input pins. The
signals should be run as differential pairs from the SPS back to
the ISL68134.
Temperature Sensing
The ISL68134 supports temperature sensing via BJT or smart
power stage sense elements. Support for BJT sense elements
utilizes the well known delta Vbe method and allows up to 2
sensors (MMBT3906 or similar) on each temperature sense
input, TMON0 and TMON1. Support for smart power stage
utilizes a linear conversion algorithm and allows 1 sensor
reading per pin. The conversion from voltage to temperature for
smart power stage sensing is user programmable via the
PowerNavigator™ GUI.
The ISL68134 supports inductor DCR sensing, which generally
requires temperature compensation due to the copper wire used
to form inductors. Copper has a positive temperature coefficient
of approximately 0.39%/°C. Since the voltage across the
inductor is sensed for the output current information, the sensed
current has the same positive temperature coefficient as the
inductor DCR.
Compensating current sense for temperature variation generally
requires that the current sensing element temperature and its
temperature coefficient is known. While temperature coefficient
is generally obtained easily, actual current sense element
temperature is essentially impossible to measure directly.
Instead, a temperature sensor (a BJT for the ISL68134) placed
near the inductors is measured and the current sense element
(DCR) temperature is calculated from that measurement.
Calculating current sense element temperature is equivalent to
applying gain and offset corrections to the temperature sensor
measurement and the ISL68134 supports both corrections.
Figure 14 on page 15 depicts the block diagram of temperature
compensation. A BJT placed near the inductors used for DCR
sensing is monitored by the IC utilizing the well known delta Vbe
method of temperature sensing. TSENSE is the direct measured
temperature of the BJT. Because the BJT is not directly sensing
DCR, corrections must be made such that TDCR reflects the true
DCR temperature. Corrections are applied according to the
relationship shown in Equation 1, where kSLOPE represents a
gain scaling and TOFFSET represents an offset correction. These
parameters are provided by the designer via the
PowerNavigator™ GUI:
T DCR = k SLOPE  T SENSE + T OFFSET
(EQ. 1)
Once TDCR has been determined, the compensated DCR value
may be determined according to Equation 2, where DCR25 is the
DCR at +25°C and TC is the temperature coefficient of copper
(3900 ppm/°C). Here, TDCR = TACTUAL
DCR CORR = DCR 25   1 + T C   T ACTUAL – 25  
(EQ. 2)
Thus, the temperature compensated DCR is now used to
determine the actual value of current in the DCR sense element.
SPS temperature sensing measures the temperature dependent
voltage output on the SPS TMON pin. All of the SPS devices
attached to the Output 0 rail have their TMON pins connected to
the ISL68134 TMON0 pin. All of the SPS devices attached to the
Output 1 rail have their TMON pins connected to the ISL68134
TMON1 pin. The reported temperature is that of the highest
temperature SPS of the group.
In addition to the external temperature sense, the IC senses its
own die temperature, which may be monitored via the
PowerNavigator™.
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14
FN8817.0
September 28, 2016
ISL68134
IPHASE#
DCR
VIN
VOUT
IC
40.2k
VINSEN
CSRTNx
TEMPERATURE
COMPENSATION
DCRCORR
CURRENT
SENSE
CSx
IPHASE#
ADC
10nF
10k
kSLOPE
TOFFSET
TO TELEMETRY
TC
TMONx
Vbe
VCCS
IC
TSENSE
FIGURE 16. INPUT VOLTAGE SENSE CONFIGURATION
FIGURE 14. BLOCK DIAGRAM OF TEMPERATURE COMPENSATION
In the physical PCB design, the temperature sense diode (BJT) is
placed close to the inductor of the phase that is never dropped
during automatic phase drop operation. Additionally, a filter
capacitor no larger than 500pF should be added near the IC
between each TMON pin and VCCS. This is shown in Figure 15 on
page 15.
IC
TMON1
VCCS
OPTIONAL AUXILIARY
TEMPERATURE SENSE
TMON0
OPTIONAL AUXILIARY
TEMPERATURE SENSE
SW1
SW2
SW3
SW0
L1
L2
L3
L0
OUT1
OUT0
FIGURE 15. RECOMMENDED PLACEMENT OF BJT
Lossless Input Current and Power Sensing
Input current telemetry is provided via an input current
synthesizer. By utilizing the IC’s ability to precisely determine its
operational conditions, input current can be synthesized to a high
degree of accuracy without the need for a lossy sense resistor.
Fine-tuning of offset and gain are provided for in the GUI. Note
that input current sense fine-tuning must be done after output
current sense setup is finalized. With a precise knowledge of
input current and voltage, input power may be computed.
Input current and power telemetry is accessed via a PMBus™ and
easily monitored in the PowerNavigator™ GUI. VIN is monitored
directly by the VINSEN pin through a 1:5 resistor divider as shown
in Figure 16.
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15
Voltage Regulation
Output voltage is sensed through the remote sense differential
amplifier and digitized. From this point, the regulation loop is
entirely digital. Traditional PID controls are utilized in conjunction
with several enhanced methods to compensate the voltage
regulation loop and tune the transient response.
Current Feedback
Current feedback in a voltage regulator is often utilized to ease
the stability design of the voltage feedback path. Additionally,
many microprocessors require the voltage regulator to have a
controlled output resistance (known as load line or droop
regulation) and this is accomplished utilizing current feedback.
For applications requiring droop regulation, the designer simply
specifies the output resistance desired using the
PowerNavigator™ GUI.
Current feedback stability benefits are available for rails that do
not specify droop regulation such as system agent. For these
applications, the designer may enable AC current feedback in the
GUI. With this configuration, the DC output voltage will be steady
regardless of load current.
Power-On Reset (POR)
Initialization of the ISL68134 begins after VCC crosses its rising
POR threshold. When POR conditions are met, the internal 1.2V
LDO is enabled and basic digital subsystem integrity checks
begin. During this process, the controller will load the selected
user configuration from NVM as indicated by the CONFIG pin
resistor value, read VIN UVLO thresholds from memory and start
the telemetry subsystem. With telemetry enabled, VIN may be
monitored to determine when it exceeds its user programmable
rising UVLO threshold. Once VCC and VIN satisfy their respective
voltage conditions, the controller is in its shutdown state. It will
transition to its active state and begin soft-start when the state of
EN0/EN1 command a start-up. While in shutdown mode, the
PWM outputs are held in a high-impedance state to assure the
drivers remain off.
Soft-Start Delay and Ramp Times
It may be necessary to set a delay from when an enable signal is
received until the output voltage starts to ramp to its target
value. In addition, the designer may wish to precisely set the time
required for an output to ramp to its target value after the delay
period has expired. These features may be used as part of an
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ISL68134
overall inrush current management strategy or to precisely
control how fast a load IC is turned on. The ISL68134 gives the
system designer several options for precisely and independently
controlling both the delay and ramp time periods. The soft-start
delay period begins when the EN pin is asserted and ends when
the delay time expires.
The soft-start delay and ramp-up/down times can be configured
via the PowerNavigator™ GUI. The device needs approximately
200µs after enable to initialize before starting to ramp up. When
the soft-start ramp period is set to 0ms, the output ramps up as
quickly as the output load capacitance and loop settings allow. It
is recommended to set the ramps to a non-zero value to prevent
inadvertent fault conditions due to excessive inrush current.
Stored Configuration Selection
As many as eight configurations may be stored and used at any
time using the on-board nonvolatile memory. Configurations are
assigned an identifier number between 0 and 7 at power-up. The
device will load the configuration indicated by the 1% resistor
value detected on the CONFIG pin. Resistor values are used to
indicate use of one of the eight possible configurations. Table 3
provides the resistor value corresponding to each configuration
identifier.
Power-Good Signals
The PG0/PG1 pins are open-drain power-good outputs that
indicate completion of the soft-start sequence and output
voltage of the associated rail within the expected regulation
range.
The PG pins may be associated or disassociated with a number of
the available fault types. This allows a system design to be tailored
for virtually any condition. In addition, these power-good
indicators will be pulled low when a fault (OCP or OVP) condition
or UV condition is detected on the associated rail.
Output Voltage Protection
Output voltage is measured at the load sensing points
differentially for regulation and the same measurement is used
for OVP and UVP. The fault thresholds are set using PMBus
commands. Figure 17 shows a simplified OVP/UVP block
diagram. The output voltage comparisons are done in the digital
domain.
VSENx
ADC
RGNDx
TABLE 3. RESISTOR VALUES TO CONFIGURATION MAPPING
R CONFIG
(Ω)
CONFIG
ID
6800
0
1800
1
2200
2
2700
3
3300
4
3900
5
4700
6
5600
7
Only the most recent configuration with a given number can be
loaded. The device supports a total of 8 stored operations. As an
example, a configuration with the identifier 0 could be saved 8
times or configurations with all 8 identifiers could be stored one
time each for a total of 8 save operations.
PowerNavigator™ provides a simple interface to save and load
configurations.
Fault Monitoring and Protection
The ISL68134 actively monitors temperature, input voltage, output
voltage and output current to detect and report fault conditions.
Fault monitors trigger configurable protective measures to prevent
damage to a load. The power-good indicators, PG0/PG1, are
provided for linking to external system monitors.
A high level of flexibility is provided in the ISL68134 fault logic.
Faults may be enabled or disabled individually. Each fault type can
also be configured to either latch off or retry indefinitely.
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16
DIGITAL OV
COMPARATOR
ISL68134
+
-
THRESHOLD
REGISTER
+
SoC
THRESHOLD
REGISTER
DIGITAL UV
COMPARATOR
FIGURE 17. OVP, UVP COMPARATORS
The device responds to an output overvoltage condition by
disabling the output, declaring a fault, setting the SALRT pin,
setting the PG pin and then pulsing the LFET until the output
voltage has dropped below the threshold. Similarly, the device
responds to an output undervoltage condition by disabling the
output, declaring a fault, setting the SALRT pin and setting the
PG pin. The output will not restart until the EN pin is cycled
(unless the device is configured to retry).
In addition, the ISL68134 features open pin sensing protection to
detect an open of the output voltage sensing circuit. When this
condition is detected, controller operation is suspended.
Output Current Protection
The ISL68134 offers a comprehensive overcurrent protection
scheme. Each phase is protected from both excessive peak
current and sustained current. In addition, the system is
protected from sustained total output overcurrent.
Figure 18 on page 17 depicts a block diagram of the system total
output current protection scheme. In this scheme, the phase
currents are summed to form ISUM. ISUM is then fed to dual
response paths allowing the user to program separate LPF,
threshold and response time. One path is intended to allow
response more quickly than the other path. With this system, the
user can allow high peak total current for a short time and a
lower level of current for a sustained time. Note that neither of
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ISL68134
these paths affect PWM activity on a cycle-by-cycle basis. The
characteristics of each path are easily set in PowerNavigator™.
In addition to total output current, the ISL68134 provides an
individual phase peak current limit that will act on PWM in a
cycle-by-cycle manner. This means that if a phase current is
detected to exceed the OC threshold, the phase PWM signal will
be inverted to move current away from the threshold. In addition
to limiting positive or negative peak current on a cycle-by-cycle
basis, individual phase OC can be configured to limit current
indefinitely or to declare a fault after a programmable number of
consecutive OC cycles. This feature is useful for applications
where a fault shutdown of the system would not be acceptable,
however, some ability to limit phase currents is desired.
Figures 21 and 22 depict this operation. If configured for
indefinite current limit, the converter will act as a current source
and VOUT will not remain at its regulation point. It should be
noted that in this case, VOUT OV or UV protection action may
occur, which could shut the regulator down.
OCP_FAST_THRESHOLD
OCP_SLOW_THRESHOLD
PLACEHOLDER
OCP_SLOW COUNTER
FILTER TIME CONSTANT
PWM
PGOOD
FIGURE 20. OCP_Slow
TOTAL OUTPUT CURRENT FAULT
FILTER
PH1 CURRENT
SYNTHESIZER
PHN CURRENT
SYNTHESIZER
FAST SUM OC
COMPARE
TIMER
TIMER
ISUM
FILTER


LIMIT
TO
FAULT
BLOCK
TIMER
LIMIT
ACT
TO
FAULT
BLOCK
COUNT
fSW
CLK
IPHASEn
+PEAK
LIMIT
Switching
Period
Count
May be set
for indefinite
limiting but
no fault
assertion
OCCOUNT
POSITIVE PEAK
LIMITING
COMPARE
COUNT
fSW
CLK
-PEAK
LIMIT
PWM
DELAY
PHASE PEAK CURRENT LIMITING AND FAULT
COMPARE
POSITIVE_CURRENT_LIMITING_PER_PHASE
DELAY
SLOW SUM OC
FILTER COMPARE
TIMER
FILTER
ACT
Switching
Period
Count
May be set
for indefinite
limiting but
no fault
assertion
UCCOUNT
NEGATIVE PEAK
LIMITING
PGOOD
ACT
TO
FAULT
BLOCK
PULSE BY
PULSE
LIMIT
ACT
TWARN
FIGURE 21. POSITIVE PEAK PHASE CURRENT LIMITING
TO
FAULT
BLOCK
PULSE BY
PULSE
LIMIT
FIGURE 18. OCP FUNCTIONAL DIAGRAM
Example OCP_Fast and OCP_Slow waveforms are shown in
Figures 19 and 20.
NEGATIVE_CURRENT_LIMITING_PER_PHASE
PWM
PGOOD
OCP_FAST_THRESHOLD
TWARN
OCP_SLOW_THRESHOLD
PLACEHOLDER
OCP_FAST COUNTER
FILTER TIME CONSTANT
FIGURE 22. NEGATIVE PEAK PHASE CURRENT LIMITING
PWM
PGOOD
FIGURE 19. OCP_Fast
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ISL68134
Smart Power Stage OC Fault Detect
Intersil Smart Power Stage (SPS) devices will output a large
signal on their IMON lines if peak current exceeds their
preprogrammed threshold. (For more detail about this
functionality, please refer to the relevant SPS datasheet.) The
ISL68134 is equipped to detect this fault flag and immediately
shut down. This detector is enabled on the GUI OverCurrent Fault
setup screen.
This feature functions by detecting signals which exceed the
current sense ADC full scale range. If this detector is disabled
while using an Intersil SPS, the SPS Fault# signal must be
connected to the controller Enable pin of the associated rail. This
will ensure that an SPS OC event will be detected and the
converter will shutdown.
HIGH OT THRESHOLD
LOW OT THRESHOLD
PWM
PGOOD
TWARN
Thermal Monitoring and Protection
The TWARN pin indicates the temperature status of the voltage
regulator. The TWARN pin is an open-drain output and an
external pull-up resistor is required. This signal is valid only after
the controller is enabled.
The TWARN signal can be used to inform the system that the
temperature of the voltage regulator is too high and the load
should reduce its power consumption. TWARN only indicates a
thermal warning, not a fault.
The thermal monitoring function block diagram is shown in
Figure 23. The ISL68134 has 2 over-temperature thresholds,
which allow both warning and fault indications. Each
temperature sensor threshold can be independently
programmed in the PowerNavigator™ GUI. Figure 24 shows the
thermal warning to TWARN and Figure 25 shows the
over-temperature fault to shutdown. PGOOD and TWARN can be
configured to indicate these warning and fault thresholds via the
PowerNavigator™ GUI.
FIGURE 24. THERMAL WARNING TO TWARN
HIGH OT THRESHOLD
LOW OT THRESHOLD
PWM
PGOOD
TWARN
FIGURE 25. OVER-TEMPERATURE FAULT
TELEMETRY
CONTROL
TEMP
SENSORS
TMONx
DELTA
VBE
ISL68134
TMAX
ADC
TWARN
VCCS
TEMP
MONITOR
FIGURE 23. BLOCK DIAGRAM OF THERMAL MONITORING
FUNCTION
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18
FN8817.0
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ISL68134
Layout and Design
Considerations
TABLE 4. PIN DESIGN AND/OR LAYOUT CONSIDERATIONS (Continued)
In addition to TB379, the following PCB and design strategies are
intended to minimize the noise coupling, the impact of board
parasitic impedances on converter performance and to optimize
the heat dissipating capabilities of the printed circuit board. This
section highlights some important practices, which should be
followed during the layout process.
PIN NAME
NOISE
SENSITIVE
PWM
No
Avoid routing near noise sensitive analog
lines such as current sense or voltage
sense.
CSx
CSRTNx
Yes
Treat each of the current sense pairs as
differential signals in the PCB layout. They
should be routed side by side on the same
layer. They should not be routed in
proximity to noisy signals like PWM or
Phase. Proper routing of current sense is
perhaps the most critical of all the layout
tasks. Tie to ground when not used.
GND
Yes
This EPAD is the return of PWM output
drivers. Use 4 or more vias to directly
connect the EPAD to the power ground
plane.
Table 4 provides general guidance on best practices related to
pin noise sensitivity. Use of good engineering judgment is
required to implement designs based on criteria specific to the
situation.
TABLE 4. PIN DESIGN AND/OR LAYOUT CONSIDERATIONS
PIN NAME
NOISE
SENSITIVE
VINSEN
Yes
Connects to the resistor divider between
VIN and GND (see Figure 16). Filter
VINSEN with 10nF to GND
RGNDx
VSENx
Yes
Treat each of the remote voltage sense
pairs as differential signals in the PCB
layout. They should be routed side by side
on the same layer. They should not be
routed in proximity to noisy signals like
PWM or Phase. Tie to ground when not
used.
PGx
No
Open-drain. 3.3V maximum pull-up
voltage. Tie to ground when not used.
SCL, SDA,
SALRT
Yes
50kHz to 2MHz signal during
communication, pair up with SALRT and
route carefully. 20 mils spacing within
SDA, SALRT and SCL; and more than
30 mils to all other signals. Refer to the
SMBus design guidelines and place
proper termination resistance for
impedance matching. Tie to ground when
not used.
AVS_CLK,
AVS_SDA,
AVS_MDA
Yes
Up to 50MHz signals during
communication, route carefully. 20 mils
spacing within CLK, SDA, MDA; and more
than 30 mils to all other signals. Tie CLK
and MDA to ground when not used.
TMONx
Yes
When diode sensing is utilized, VCCS is
the return path for the delta Vbe currents.
Utilize a separate VCCS route specifically
for diode temp sense. A filter capacitor no
greater than 500pF should be placed
between each TMON pin and the VCCS pin
near the IC. Tie to ground when not used.
TWARN
No
Open-drain. 3.3V maximum pull-up
voltage.
VCC
Yes
Place at least 2.2µF MLCC decoupling
capacitor directly at the pin.
VCCS
Yes
Place 4.7µF MLCC decoupling capacitor
directly at the pin.
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DESCRIPTION
19
General
Comments
DESCRIPTION
The layer next to the top or bottom layer is
preferred to be ground layers, while the
signal layers can be sandwiched in the
ground layers if possible.
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ISL68134
PMBus™ Operation
TABLE 5. PMBus 8-BIT AND 7-BIT FORMAT ADDRESS (HEX)
The ISL68134 PMBus slave address is pin selectable utilizing the
ADDRESS pin and resistor value described in Table 3 on page 16.
For proper operation, users should follow the PMBus protocol, as
shown in “PMBus Protocol” on page 21. The supported PMBus
addresses are in 8-bit format (including write and read bit):
80-8E, A0-AE, B0-BE and C0-CE. The least significant bit of the
8-bit address is for write (0h) and read (1h). PMBus commands
are in the range from 0x00h to 0xFFh. For the ISL68134, Page 0
corresponds to Output 0 and Page 1 to Output 1. For reference
purposes, the 7-bit format addresses are also summarized in
Table 5.
8-BIT
7-BIT
8-BIT
7-BIT
8-BIT
7-BIT
8-BIT
7-BIT
84/85
42
A4/A5
52
B4/B5
5A
C0/C1
60
86/87
43
A6/A7
53
B6/B7
5B
C6/C7
63
8C/8D
46
AC/AD
56
BC/BD
5E
CC/CD
66
8E/8F
47
AE/AF
57
BE/BF
5F
CE/CF
67
The PMBus data formats follow PMBus Specification version 1.3
and SMBus version 2.0.
Basic PMBus telemetry commands are summarized in “PMBus™
Command Summary” on page 22.
3.3V
VCC
1.2V
Tel ADC Customer Start-up PROGRAM CONFIGURATION
Fac
PLL
USE PREVIOUS PROGRAMMED
VCCS
Config LOCKED Initialized Config Diagnostics (BT, TMAX, PS, DE, etc.)
CONFIGURATION FOR STARTUP AND OPERATION
LOAD
DONE
LOAD
DONE
PROGRAM CONFIGURATION
PROGRAM CONFIGURATION
VCCS
(BT, TMAX, PS, DE, etc.)
(BT, TMAX, PS, DE, etc.)
POR
~30ms
INDEFINITELY
ENABLE
PMBus
COMMAND
PMBus
COMMAND
PMBus
COMMAND
PMBus
COMMAND
VOUT
FIGURE 26. SIMPLIFIED PMBus INITIALIZATION TIMING DIAGRAM
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FN8817.0
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ISL68134
PMBus Protocol
1. Send Byte Protocol
S: Start Condition
A: Acknowledge (“0”)
S
7+1
1
Slave Address_0
A
1
8
1
1
N: Not Acknowledge (“1”)
A
PEC
A
P
W: Write (“0”)
8
Command Code
RS: Repeated Start Condition
R: Read (“1”)
Optional 9 Bits for SMBus/PMBus
NOT used in I2C
PEC: Packet Error Checking
P: Stop Condition
Example command: 03h Clear Faults
(This will clear all of the bits in Status Byte for the selected Rail)
Acknowledge or DATA from Slave,
ISL68134 Controller
Not Used for One Byte Word
2. Write Byte/Word Protocol
1
7+1
1
8
1
8
1
8
1
8
1
1
S
Slave Address_0
A
Command Code
A
Low Data Byte
A
High Data Byte
A
PEC
A
P
Optional 9 Bits for SMBus/PMBus
NOT used in I2C
Example command: 21h VOUT_COMMAND
3. Read Byte/Word Protocol
1
7+1
S
Slave Address_0
1
8
1
A
Command Code
A
1
7+1
RS
Slave Address_1
Not Used for One Byte Word Read
1
8
1
8
1
8
A
Low Data Byte
A
High Data Byte
A
PEC
1
1
N P
Optional 9 Bits for SMBus/PMBus
NOT used in I2C
Example command: 8B READ_VOUT (Two words, read voltage of the selected rail).
STOP (P) bit is NOT allowed before the repeated START condition when “reading” contents of a register.
4. Group Command Protocol - No more than one command can be sent to the same Address
1
7+1
S
Slave ADDR1_0
1
8
1
A
Command Code
A
8
Low Data Byte
1
8
1
8
1
A
High Data Byte
A
PEC
A
1
7+1
1
8
1
8
1
8
1
S
Slave ADDR2_0
A
Command Code
A
Data Byte
A
PEC
A
1
7+1
1
8
1
8
1
8
1
1
RS
Slave ADDR3_0
A
High Data Byte
A
PEC
A
P
8
Command Code
A
Low Data Byte
A
Optional 9 Bits for SMBus/PMBus
NOT used in I2C
5. Alert Response Address (ARA, 0001_1001, 25h) for SMBus and PMBus, not used for I2C
1
S
7+1
ALERT Addr_1
1
A
7+1
Slave_Address_1
1
8
1
1
A
PEC
A
P
Optional 9 Bits for SMBus/PMBus
NOT used in I2C
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ISL68134
PMBus™ Command Summary
CODE
COMMAND NAME
DESCRIPTION
DATA
TYPE FORMAT
DEFAULT
VALUE
DEFAULT SETTING
00h PAGE
Selects Output 0, 1, or both
R/W
Bit
00h
Page 0
01h OPERATION
Enable/disable, margin settings
R/W
Bit
08h
Off
02h ON_OFF_CONFIG
On/off configuration settings
R/W
Bit
16h
ENABLE pin control
03h CLEAR_FAULTS
Clears all fault bits in all registers and releases the Write N/A
SALRT pin
N/A
10h WRITE_PROTECT
Write protection to sets of commands
R/W
Bit
00h
No write protection
20h VOUT_MODE
Defines format for output voltage related
commands
Read Bit
40h
Direct Format
21h VOUT_COMMAND
Sets the nominal VOUT target
R/W
Direct
0384h
900mV
22h VOUT_TRIM
Applies trim voltage to VOUT set-point
R/W
Direct
0000h
0mV
24h VOUT_MAX
Absolute maximum voltage setting
R/W
Direct
08FCh
2300mV
25h VOUT_MARGIN_HIGH
Sets VOUT target during margin high
R/W
Direct
0640h
1600mV
26h VOUT_MARGIN_LOW
Sets VOUT target during margin low
R/W
Direct
00FAh
250mV
27h VOUT_TRANSITION_RATE Slew rate setting for VOUT changes
R/W
Direct
0064h
10,000µV/µs
28h VOUT_DROOP
Sets the load line (V/I slope) resistance for the
output
R/W
Direct
0000h
0µV/A
2Bh VOUT_MIN
Absolute minimum target voltage setting
R/W
Direct
0000h
0mV
40h VOUT_OV_FAULT_LIMIT
Sets the VOUT overvoltage fault threshold
R/W
Direct
076Ch
1900mV
44h VOUT_UV_FAULT_LIMIT
Sets the VOUT undervoltage fault threshold
R/W
Direct
0000h
0mV
4Fh OT_FAULT_LIMIT
Sets the over-temperature fault threshold
R/W
Direct
007Dh
+125°C
51h OT_WARN_LIMIT
Sets the over-temperature warn threshold
R/W
Direct
07D0h
+2000°C
55h VIN_OV_FAULT_LIMIT
Sets the VIN overvoltage fault threshold
R/W
Direct
36B0h
14,000mV
59h VIN_UV_FAULT_LIMIT
Sets the VIN undervoltage fault threshold
R/W
Direct
1F40h
8,000mV
5Bh IIN_OC_FAULT_LIMIT
Sets the IIN overcurrent fault threshold
R/W
Direct
0032h
50A
60h TON_DELAY
Sets the delay time from enable to VOUT rise
R/W
Direct
0014h
200µs
61h TON_RISE
Turn-on rise time
R/W
Direct
01F4h
500µs
64h TOFF_DELAY
Turn-off delay time
R/W
Direct
0000h
0µs
65h TOFF_FALL
Turn-off fall time
R/W
Direct
01F4h
500µs
78h STATUS_BYTE
First byte of STATUS_WORD
Read Bit
N/A
N/A
79h STATUS_WORD
Summary of critical faults
Read Bit
N/A
N/A
7Ah STATUS_VOUT
Reports VOUT faults
Read Bit
N/A
N/A
7Bh STATUS_IOUT
Reports IOUT faults
Read Bit
N/A
N/A
7Ch STATUS_INPUT
Reports input faults
Read Bit
N/A
N/A
7Dh STATUS_TEMPERATURE
Reports temperature warnings/faults
Read Bit
N/A
N/A
7Eh STATUS_CML
Reports communication, memory, logic errors
Read Bit
N/A
N/A
80h STATUS_MFR_SPECIFIC
Reports specific events
Read Bit
N/A
N/A
88h READ_VIN
Reports input voltage measurement
Read Direct
N/A
N/A
89h READ_IIN
Reports input current measurement
Read Direct
N/A
N/A
8Bh READ_VOUT
Reports output voltage measurement
Read Direct
N/A
N/A
8Ch READ_IOUT
Reports output current measurement
Read Direct
N/A
N/A
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FN8817.0
September 28, 2016
ISL68134
PMBus™ Command Summary (Continued)
CODE
COMMAND NAME
DATA
TYPE FORMAT
DESCRIPTION
DEFAULT
VALUE
DEFAULT SETTING
8Dh READ_TEMPERATURE_1
Reports power stage temperature measurement
Read Direct
N/A
N/A
8Eh READ_TEMPERATURE_2
Reports TMON0 temperature measurement
Read Direct
N/A
N/A
8Fh READ_TEMPERATURE_3
Reports TMON1 temperature measurement
Read Direct
N/A
N/A
96h READ_POUT
Reports output power
Read Direct
N/A
N/A
97h READ_PIN
Reports input power
Read Direct
N/A
N/A
98h PMBUS_REVISION
Reports specific events
Read Bit
33h
Revision 1.3
ADh IC_DEVICE_ID
Reports device identification information
Read Bit
49D21F00h
ISL68134
AEh IC_DEVICE_REV
Reports device revision information
Read Bit
N/A
N/A
E7h APPLY_SETTINGS
Instructs device to apply PMBus setting changes
Write Bit
01h
F2h RESTORE_CONFIG
Allows selection of configurations from NVM
Write Bit
N/A
PMBus™ Use Guidelines
All commands can be read at any time
Always disable the outputs when writing commands that change device settings. Exceptions to this rule are commands intended to be
written while the device is enabled, for example, OPERATION.
PMBus™ Data Formats
Direct (D)
The Direct data format is a two byte two’s complement binary integer.
Bit Field (BIT)
Break down of Bit Field is provided in “PMBus™ Command Detail” on page 23.
PMBus™ Command Detail
PAGE (00h)
Definition: Selects Controller 0, Controller 1 or both Controllers 0 and 1 to receive commands. All commands following this command
will be received and acted on by the selected controller or controllers.
Data Length in Bytes: 1
Data Format: Bit Field
Type: R/W
Default Value: 00h
COMMAND
PAGE (00h)
Format
Bit Field
Bit Position
7
6
5
4
3
2
1
0
Access
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
0
0
0
0
0
0
Function
See Following Table
Default Value
0
0
BITS 7:4
BITS 3:0
PAGE
0000
0000
0
0000
0001
1
1111
1111
Both
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FN8817.0
September 28, 2016
ISL68134
OPERATION (01h)
Definition: Sets enable state when configured for PMBus enable. Sets the source of the target VOUT. The device always acts on faults
during margin. The following table reflects the valid settings for the device.
Paged or Global: Paged
Data Length in Bytes: 1
Data Format: Bit Field
Type: R/W
Default Value: 08h
COMMAND
OPERATION (01h)
Format
Bit Field
Bit Position
7
6
5
4
3
2
1
0
Access
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
0
0
0
0
0
0
Function
See Following Table
Default Value
BIT NUMBER
Bits 7:6
Bits 5:4
Bits 3:2
Bit 1
Bit 0
PURPOSE
Enable/Disable
VOUT Source
0
1
BIT VALUE
00
MEANING
Immediate off (decay)
01
Soft-off (Use TOFF_DELAY and TOFF_FALL)
10
On
00
VOUT_COMMAND
01
VOUT_MARGIN_LOW
10
VOUT_MARGIN_HIGH
11
AVSBus target rail voltage
Margin Response
10
Act on faults
AVSBus Copy
0
VOUT_COMMAND remains unchanged
1
AVSBus target rail voltage changes are copied
to VOUT_COMMAND
0
Not used
Not Used
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FN8817.0
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ISL68134
ON_OFF_CONFIG (02h)
Definition: Configures the interpretation of the OPERATION command and the ENABLE pin (EN). The below table reflects the valid
settings for the device.
Paged or Global: Global
Data Length in Bytes: 1
Data Format: Bit Field
Type: R/W
Default Value: 16h (ENABLE pin control)
COMMAND
ON_OFF_CONFIG (02h)
Format
Bit Field
Bit Position
7
6
5
4
3
2
1
0
Access
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
0
0
0
Function
See Following Table
Default Value
0
BIT NUMBER
PURPOSE
0
0
0
0
BIT VALUE
MEANING
7:5
Not Used
000
Not used
4:2
Sets the Source of Enable
000
Device always enabled regardless of pin or OPERATION
command state
101
Device starts from enable pin only
110
Device starts from OPERATION command only
111
1
Enable Pin Polarity
0
Enable Pin Turn-Off Action
1
Device starts from OPERATION command and enable pin
Active high only
1
Turn off immediately with decay
0
Use programmed TOFF_DELAY and TOFF_FALL settings
CLEAR_FAULTS (03h)
Definition: Clears all fault bits in all registers and releases the SALRT pin (if asserted) simultaneously. If a fault condition still exits, the
bit will reassert immediately. This command will not restart a device if it is shut down, it will only clear the faults.
Paged or Global: Global
Data Length in Bytes: 0
Data Format: N/A
Type: Write Only
Default Value: N/A
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FN8817.0
September 28, 2016
ISL68134
WRITE_PROTECT (10h)
Definition: Sets the write protection of certain configuration commands.
Paged or Global: Global
Data Length in Bytes: 1
Data Format: Bit Field
Type: R/W
Default Value: 00h (Enable all writes)
COMMAND
WRITE_PROTECT (10h)
Format
Bit Field
Bit Position
7
6
5
Access
R/W
R/W
R/W
Function
4
3
2
1
0
R/W
R/W
R/W
R/W
R/W
0
0
0
See Following Table
Default Value
0
0
0
0
SETTINGS
0
PROTECTION
40h
Disables all writes except to WRITE_PROTECT, OPERATION, CLEAR_FAULTS, PAGE
20h
Disables all writes except all above plus ON_OFF_CONFIG and VOUT_COMMAND, VOUT_TRIM
00h
Enables all writes
NOTE: Any settings other than the 3 shown in table will result in an invalid data fault.
VOUT_MODE (20h)
Definition: Returns the supported VOUT mode. This device only supports absolute direct mode.
Paged or Global: Global
Data Length in Bytes: 1
Data Format: Bit Field
Type: Read Only
Default Value: 40h
Units: N/A
Equation: N/A
VOUT_COMMAND (21h)
Definition: Sets the value of VOUT when the OPERATION command is configured for PMBus nominal operation.
Paged or Global: Paged
Data Length in Bytes: 2
Data Format: Direct
Type: R/W
Default Value: 0384h (900mV)
Units: mV
Equation: VOUT_COMMAND = (Direct value)
Range: VOUT_MIN to VOUT_MAX
COMMAND
VOUT_COMMAND (21h)
Format
Direct
Bit Position
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
Access
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
0
0
0
1
0
0
Function
Default Value
Two’s Complement Integer
0
0
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0
0
0
0
1
1
1
0
FN8817.0
September 28, 2016
ISL68134
VOUT_TRIM (22h)
Definition: Sets a fixed trim voltage to the output voltage command value. This command is typically used to calibrate a device in the
application circuit.
Paged or Global: Paged
Data Length in Bytes: 2
Data Format: Direct
Type: R/W
Default Value: 0000h (0mV)
Units: mV
Equation: VOUT_TRIM = (Direct value)
Range: ±250mV
COMMAND
VOUT_TRIM (22h)
Format
Direct
Bit Position
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
Access
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
0
0
0
0
0
0
Function
Default Value
Two’s Complement Integer
0
0
0
0
0
0
0
0
0
0
VOUT_MAX (24h)
Definition: Sets the maximum allowed VOUT target regardless of any other commands or combinations.
Paged or Global: Paged
Data Length in Bytes: 2
Data Format: Direct
Type: R/W
Default Value: 08FCh (2300mV)
Units: mV
Equation: VOUT_MAX = (Direct value)
Range: 0mV to 3,300mV
COMMAND
VOUT_MAX (24h)
Format
Direct
Bit Position
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
Access
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
0
0
0
0
1
0
1
1
1
1
0
0
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27
Function
Default Value
Two’s Complement Integer
0
0
1
1
FN8817.0
September 28, 2016
ISL68134
VOUT_MARGIN_HIGH (25h)
Definition: Sets the value of VOUT when the OPERATION command is configured for margin high.
Paged or Global: Paged
Data Length in Bytes: 2
Data Format: Direct
Type: R/W
Default Value: 0640h (1600mV)
Units: mV
Equation: VOUT_MARGIN_HIGH = (Direct value)
Range: VOUT_MIN to VOUT_MAX
COMMAND
VOUT_MARGIN_HIGH (25h)
Format
Direct
Bit Position
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
Access
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
0
0
0
0
0
1
0
0
0
0
0
0
Function
Default Value
Two’s Complement Integer
1
0
0
1
VOUT_MARGIN_LOW (26h)
Definition: Sets the value of VOUT when the OPERATION command is configured for margin low.
Paged or Global: Paged
Data Length in Bytes: 2
Data Format: Direct
Type: R/W
Default Value: 00FAh (250mV)
Units: mV
Equation: VOUT_MARGIN_LOW = (Direct value)
Range: VOUT_MIN to VOUT_MAX
COMMAND
VOUT_MARGIN_LOW (26h)
Format
Direct
Bit Position
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
Access
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
1
1
1
0
1
0
Function
Default Value
Two’s Complement Integer
0
0
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0
0
0
0
0
0
1
1
FN8817.0
September 28, 2016
ISL68134
VOUT_TRANSITION_RATE (27h)
Definition: Sets the output voltage rate of change during regulation. Changes to this setting require a write to the APPLY_SETTINGS
command before the change will take effect.
Paged or Global: Paged
Data Length in Bytes: 2
Data Format: Direct
Type: R/W
Default Value: 0064h (10,000µV/µs)
Units: µV/µs
Equation: VOUT_TRANSITION_RATE = (Direct Value)*100
Range: 100µV/µs to 100mV/µs
COMMAND
VOUT_TRANSITION_RATE (27h)
Format
Direct
Bit Position
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
Access
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
1
0
0
1
0
0
Function
Default Value
Two’s Complement Integer
0
0
0
0
0
0
0
0
0
1
VOUT_DROOP (28h)
Definition: Sets the output voltage rate of change during regulation. Changes to this setting require a write to the APPLY_SETTINGS
command before the change will take effect.
Paged or Global: Paged
Data Length in Bytes: 2
Data Format: Direct
Type: R/W
Default Value: 0000h (0µV/A)
Units: µV/A
Equation: VOUT_DROOP = (Direct Value)*10
Range: 0 to 16,000µV/A
COMMAND
VOUT_DROOP (28h)
Format
Direct
Bit Position
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
Access
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
0
0
0
0
0
0
Function
Default Value
Two’s Complement Integer
0
0
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0
0
0
0
0
0
0
0
FN8817.0
September 28, 2016
ISL68134
VOUT_MIN (2Bh)
Definition: Sets the minimum allowed VOUT target regardless of any other commands or combinations.
Paged or Global: Paged
Data Length in Bytes: 2
Data Format: Direct
Type: R/W
Default Value: 0000h (0mV)
Units: mV
Equation: VOUT_MIN = (Direct Value)
Range: 0V to VOUT_MAX
COMMAND
VOUT_MIN (2Bh)
Format
Direct
Bit Position
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
Access
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
0
0
0
0
0
0
0
0
0
0
0
0
Function
Default Value
Two’s Complement Integer
0
0
0
0
VOUT_OV_FAULT_LIMIT (40h)
Definition: Sets the VOUT overvoltage fault threshold. Changes to this setting require a write to the APPLY_SETTINGS command before
the change will take effect.
Paged or Global: Paged
Data Length in Bytes: 2
Data Format: Direct
Type: R/W
Default Value: 076Ch (1900mV)
Units: mV
Equation: VOUT_OV_FAULT_LIMIT = (Direct value)
Range: 0V to VOUT_MAX
COMMAND
VOUT_OV_FAULT_LIMIT (40h)
Format
Direct
Bit Position
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
Access
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
0
0
0
0
0
1
1
0
1
1
0
0
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Function
Default Value
Two’s Complement Integer
1
1
0
1
FN8817.0
September 28, 2016
ISL68134
VOUT_UV_FAULT_LIMIT (44h)
Definition: Sets the VOUT undervoltage fault threshold. This fault is masked during ramp or when disabled.
Paged or Global: Paged
Data Length in Bytes: 2
Data Format: Direct
Type: R/W
Default Value: 0000h (0mV)
Units: mV
Equation: VOUT_UV_FAULT_LIMIT = (Direct value)
Range: 0V to VOUT_MAX
COMMAND
VOUT_UV_FAULT_LIMIT (44h)
Format
Direct
Bit Position
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
Access
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
0
0
0
0
0
0
0
0
0
0
0
0
Function
Default Value
Two’s Complement Integer
0
0
0
0
OT_FAULT_LIMIT (4Fh)
Definition: Sets the power stage over-temperature fault limit.
Paged or Global: Paged
Data Length in Bytes: 2
Data Format: Direct
Type: R/W
Default Value: 007Dh (+125°C)
Units: °C
Equation: OT_FAULT_LIMIT = (Direct value)
Range: 0°C to +2000°C
COMMAND
OT_FAULT_LIMIT (4Fh)
Format
Direct
Bit Position
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
Access
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
0
0
0
0
0
0
1
1
1
1
0
1
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31
Function
Default Value
Two’s Complement Integer
0
0
0
1
FN8817.0
September 28, 2016
ISL68134
OT_WARN_LIMIT (51h)
Definition: Sets the system over-temperature warn limit. If any measured temperature exceeds this value, the device will:
• Set the TEMPERATURE bit in STATUS_BYTE and STATUS_WORD
• Set the OT_WARNING bit in STATUS_TEMPERATURE
• Set the SALRT pin
• Set the TWARN pin
Paged or Global: Paged
Data Length in Bytes: 2
Data Format: Direct
Type: R/W
Default Value: 07D0h (+2000°C)
Units: °C
Equation: OT_WARN_LIMIT = (Direct value)
Range: 0°C to +2000°C
COMMAND
OT_WARN_LIMIT (51h)
Format
Direct
Bit Position
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
Access
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
0
0
0
0
0
1
0
1
0
0
0
0
Function
Default Value
Two’s Complement Integer
1
1
1
1
VIN_OV_FAULT_LIMIT (55h)
Definition: Sets the VIN overvoltage fault threshold. Changes to this setting require a write to the APPLY_SETTINGS command before the
change will take effect.
Paged or Global: Global
Data Length in Bytes: 2
Data Format: Direct
Type: R/W
Default Value: 36B0h (14,000mV)
Units: mV
Equation: VIN_OV_FAULT_LIMIT = (Direct value)
Range: 0 to 16,000mV
COMMAND
VIN_OV_FAULT_LIMIT (55h)
Format
Direct
Bit Position
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
Access
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
0
0
1
1
0
1
1
1
0
0
0
0
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32
Function
Default Value
Two’s Complement Integer
1
0
1
0
FN8817.0
September 28, 2016
ISL68134
VIN_UV_FAULT_LIMIT (59h)
Definition: Sets the VIN undervoltage fault threshold. Also referred to as Undervoltage Lockout (UVLO). Changes to this setting require a
write to the APPLY_SETTINGS command before the change will take effect.
Paged or Global: Global
Data Length in Bytes: 2
Data Format: Direct
Type: R/W
Default Value: 1F40h (8,000mV)
Units: mV
Equation: VIN_UV_FAULT_LIMIT = (Direct value)
Range: 0mV to 16,000mV
COMMAND
VIN_UV_FAULT_LIMIT (59h)
Format
Direct
Bit Position
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
Access
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
0
0
0
0
0
0
Function
Default Value
Two’s Complement Integer
0
0
0
1
1
1
1
1
0
1
IIN_OC_FAULT_LIMIT (5Bh)
Definition: Sets the IIN overcurrent fault threshold. Changes to this setting require a write to the APPLY_SETTINGS command before the
change will take effect.
Paged or Global: Global
Data Length in Bytes: 2
Data Format: Direct
Type: R/W
Default Value: 0032h (50A)
Units: A
Equation: IIN_OC_FAULT_LIMIT = (Direct value)
Range: 0A to 50A
COMMAND
IIN_OC_FAULT_LIMIT (5Bh)
Format
Direct
Bit Position
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
Access
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
0
0
0
0
0
0
1
1
0
0
1
0
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33
Function
Default Value
Two’s Complement Integer
0
0
0
0
FN8817.0
September 28, 2016
ISL68134
TON_DELAY (60h)
Definition: Sets the delay time of VOUT during enable.
Paged or Global: Paged
Data Length in Bytes: 2
Data Format: Direct
Type: R/W
Default Value: 0014h (200µs)
Units: µs
Equation: TON_DELAY = (Direct value)*10
Range: 200µs to 655,340µs
COMMAND
TON_DELAY (60h)
Format
Direct
Bit Position
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
Access
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
0
0
0
0
0
0
0
1
0
1
0
0
Function
Two’s Complement Integer
Default Value
0
0
0
0
TON_RISE (61h)
Definition: Sets the rise time of VOUT during enable. Changes to this setting require a write to the APPLY_SETTINGS command before
the change will take effect. This function uses the value of VOUT to calculate rise time, so APPLY_SETTINGS must also be sent after and
change to the VOUT target for accurate rise time.
Paged or Global: Paged
Data Length in Bytes: 2
Data Format: Direct
Type: R/W
Default Value: 01F4h (500µs)
Units: µs
Equation: TON_RISE = (Direct value)
Range: 0µs to 10,000µs
COMMAND
TON_RISE (61h)
Format
Direct
Bit Position
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
Access
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
1
1
0
1
0
0
Function
Default Value
Two’s Complement Integer
0
0
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0
0
0
0
0
1
1
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FN8817.0
September 28, 2016
ISL68134
TOFF_DELAY (64h)
Definition: Sets the delay time of VOUT during disable.
Paged or Global: Paged
Data Length in Bytes: 2
Data Format: Direct
Type: R/W
Default Value: 0000h (0µs)
Units: µs
Equation: TOFF_DELAY = (Direct value)*10
Range: 0µs to 100,000µs
COMMAND
TOFF_DELAY (64h)
Format
Direct
Bit Position
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
Access
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
0
0
0
0
0
0
0
0
0
0
0
0
Function
Two’s Complement Integer
Default Value
0
0
0
0
TOFF_FALL (65h)
Definition: Sets the fall time of VOUT during disable. Changes to this setting require a write to the APPLY_SETTINGS command before
the change will take effect. This function uses the value of VOUT to calculate fall time, so APPLY_SETTINGS must also be sent after and
change to the VOUT target for accurate fall time.
Paged or Global: Paged
Data Length in Bytes: 2
Data Format: Direct
Type: R/W
Default Value: 01F4h (500µs)
Units: µs
Equation: TOFF_FALL = (Direct value) *1
Range: 0 to 10,000µs
COMMAND
TOFF_FALL (65h)
Format
Direct
Bit Position
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
Access
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
1
1
0
1
0
0
Function
Default Value
Two’s Complement Integer
0
0
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35
0
0
0
0
0
1
1
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FN8817.0
September 28, 2016
ISL68134
STATUS_BYTE (78h)
Definition: Returns a summary of the unit’s fault status. Based on the information in this byte, the host can get more information by
reading the appropriate status registers. A fault in either output will be reported here.
Paged or Global: Global
Data Length in Bytes: 2
Data Format: Bit Field
Type: Read Only
Default Value: N/A
COMMAND
STATUS_BYTE (78h)
Format
Bit Field
Bit Position
7
6
5
Access
R
R
R
Function
4
3
2
1
0
R
R
R
R
R
See Following Table
BIT NUMBER
STATUS BIT NAME
MEANING
7
Not Used
Not used
6
OFF
This bit is asserted if the unit is not providing power to the output,
regardless of the reason, including simply not being enabled.
5
VOUT_OV_FAULT
An output overvoltage fault has occurred.
4
IOUT_OC_FAULT
An output overcurrent fault has occurred.
3
VIN_UV_FAULT
An input undervoltage fault has occurred.
2
TEMPERATURE
A temperature fault or warning has occurred.
1
CML
A communications, memory or logic fault has occurred.
0
None of the above
A status change other than those listed above has occurred.
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ISL68134
STATUS_WORD (79h)
Definition: Returns a summary of the device’s fault status. Based on the information in these bytes, the host can get more information
by reading the appropriate status registers. A fault in either output will be reported here. The low byte of the STATUS_WORD contains
the same information as the STATUS_BYTE (78h) command.
Paged or Global: Global
Data Length in Bytes: 2
Data Format: Bit Field
Type: Read Only
Default Value: N/A
COMMAND
STATUS_WORD (79h)
Format
Bit Field
Bit Position
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
Access
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
Function
See Following Table
BIT NUMBER
STATUS BIT NAME
MEANING
15
VOUT
An output voltage fault has occurred.
14
IOUT
An output current fault has occurred.
13
INPUT
An input voltage fault has occurred.
12
MFR_SPECIFIC
A manufacturer specific event has occurred.
11
POWER_GOOD #
The POWER_GOOD signal, if present, is negated. (Note 8)
Not Used
Not used
OFF
This bit is asserted if the unit is not providing power to the output,
regardless of the reason, including simply not being enabled.
5
VOUT_OV_FAULT
An output overvoltage fault has occurred.
4
IOUT_OC_FAULT
An output overcurrent fault has occurred.
3
VIN_UV_FAULT
An input undervoltage fault has occurred.
2
TEMPERATURE
A temperature fault or warning has occurred.
1
CML
A communications, memory or logic fault has occurred.
0
None of the Above
A status change other than those listed above has occurred.
10:7
6
NOTE:
8. If the POWER_GOOD# bit is set, this indicates that the POWER_GOOD signal, if present, is signaling that the output power is not good.
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ISL68134
STATUS_VOUT (7Ah)
Definition: Returns a summary of output voltage faults.
Paged or Global: Paged
Data Length in Bytes: 1
Data Format: Bit Field
Type: Read Only
Default Value: N/A
COMMAND
STATUS_VOUT (7Ah)
Format
Bit Field
Bit Position
7
6
5
Access
R
R
R
Function
4
3
2
1
0
R
R
R
R
R
See Following Table
BIT NUMBER
STATUS BIT NAME
7
6:5
MEANING
VOUT_OV_FAULT
Indicates an output overvoltage fault.
Not Used
Not used
4
VOUT_UV_FAULT
Indicates an output undervoltage fault.
3
VOUT_MAX Warning
Indicates an output voltage maximum warning.
Not Used
Not used
2:0
STATUS_IOUT (7Bh)
Definition: Returns a summary of output current faults.
Paged or Global: Paged
Data Length in Bytes: 1
Data Format: Bit Field
Type: Read Only
Default Value: N/A
COMMAND
STATUS_IOUT (7Bh)
Format
Bit Field
Bit Position
7
6
5
4
3
2
1
0
Access
R
R
R
R
R
R
R
R
Function
See Following Table
BIT NUMBER
MEANING
7
An output overcurrent fault has occurred.
6
An output overcurrent and undervoltage fault has occurred.
5:4
3
2:0
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Not used
A current share fault has occurred.
Not used
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ISL68134
STATUS_INPUT (7Ch)
Definition: Returns a summary of input voltage faults.
Paged or Global: Global
Data Length in Bytes: 1
Data Format: Bit Field
Type: Read Only
Default Value: N/A
COMMAND
STATUS_INPUT (7Ch)
Format
Bit Field
Bit Position
7
6
5
4
3
2
1
0
Access
R
R
R
R
R
R
R
R
Function
See Following Table
BIT NUMBER
7
6:5
MEANING
An input overvoltage fault has occurred.
Not used
4
An input undervoltage fault has occurred. This fault is initially masked until VIN exceeds the UV threshold
3
Not used
2
An input overcurrent fault has occurred.
1:0
Not used
STATUS_TEMPERATURE (7Dh)
Definition: Returns a summary of temperature related faults.
Paged or Global: Global
Data Length in Bytes: 1
Data Format: Bit Field
Type: Read Only
Default Value: N/A
COMMAND
STATUS_TEMPERATURE (7Dh)
Format
Bit Field
Bit Position
7
6
5
Access
R
R
R
4
3
2
1
0
R
R
R
R
R
Function
See Following Table
BIT NUMBER
MEANING
7
An over-temperature fault has occurred.
6
An over-temperature warning has occurred.
5
Not used
4
An under-temperature fault has occurred.
3:0
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Not used
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September 28, 2016
ISL68134
STATUS_CML (7Eh)
Definition: Returns a summary of any communications, logic and/or memory errors.
Paged or Global: Global
Data Length in Bytes: 1
Data Format: Bit Field
Type: Read Only
Default Value: N/A
COMMAND
STATUS_CML (7Eh)
Format
Bit Field
Bit Position
7
6
5
Access
R
R
R
Function
4
3
2
1
0
R
R
R
R
R
See Following Table
BIT NUMBER
MEANING
7
Invalid or unsupported PMBus™ Command was received.
6
The PMBus™ command was sent with invalid or unsupported data.
5
A packet error was detected in the PMBus™ command.
4
Memory fault detected.
3
Processor fault detected.
2
Not used
1
A PMBus™ command tried to write to a read only or protected command, or a communication fault other than the
ones listed in this table has occurred.
0
A memory or logic fault not listed above was detected.
STATUS_MFR_SPECIFIC (80h)
Definition: Returns the status of specific information detailed below.
Paged or Global: Global
Data Length in Bytes: 1
Data Format: Bit Field
Type: Read Only
Default Value: N/A
COMMAND
STATUS_MFR_SPECIFIC (80h)
Format
Bit Field
Bit Position
7
6
5
4
3
2
1
0
Access
R
R
R
R
R
R
R
R
Function
See Following Table
BIT
MEANING
7:2
Not used
1
OTP NVM memory is full
0
Not used
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ISL68134
READ_VIN (88h)
Definition: Returns the input voltage reading.
Paged or Global: Global
Data Length in Bytes: 2
Data Format: Direct
Type: Read Only
Default Value: N/A
Units: mV
Equation: READ_VIN = (Direct value)
COMMAND
READ_VIN (88h)
Format
Direct
Bit Position
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
Access
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
Function
Two’s Complement Integer
READ_IIN (89h)
Definition: Returns the input current reading.
Paged or Global: Global
Data Length in Bytes: 2
Data Format: Direct
Type: Read Only
Default Value: N/A
Units: A
Equation: READ_IIN = (Direct value)/100
COMMAND
READ_IIN (89h)
Format
Direct
Bit Position
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
Access
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
Function
Two’s Complement Integer
READ_VOUT (8Bh)
Definition: Returns the output voltage reading.
Paged or Global: Paged
Data Length in Bytes: 2
Data Format: Direct
Type: Read Only
Default Value: N/A
Units: mV
Equation: READ_VOUT = (Direct value)
COMMAND
READ_VOUT (8Bh)
Format
Direct
Bit Position
15
14
13
12
11
10
Access
R
R
R
R
R
R
Function
Submit Document Feedback
9
8
7
6
5
4
3
2
1
0
R
R
R
R
R
R
R
R
R
R
Two’s Complement Integer
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ISL68134
READ_IOUT (8Ch)
Definition: Returns the output current reading.
Paged or Global: Paged
Data Length in Bytes: 2
Data Format: Direct
Type: Read Only
Default Value: N/A
Units: A
Equation: READ_IOUT = (Direct value)/10
COMMAND
READ_IOUT (8Ch)
Format
Direct
Bit Position
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
Access
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
Function
Two’s Complement Integer
READ_TEMPERATURE_1 (8Dh)
Definition: Returns the temperature reading of the power stage.
Paged or Global: Paged
Data Length in Bytes: 2
Data Format: Direct
Type: Read Only
Default Value: N/A
Units: °C
Equation: READ_TEMPERATURE_1 = (Direct value)
COMMAND
READ_TEMPERATURE_1 (8Dh)
Format
Direct
Bit Position
15
14
13
12
11
10
Access
R
R
R
R
R
R
Function
9
8
7
6
5
4
3
2
1
0
R
R
R
R
R
R
R
R
R
R
Two’s Complement Integer
READ_TEMPERATURE_2 (8Eh)
Definition: Returns the temperature reading from a remote diode connected to TMON0 when configured for diode sensing.
Paged or Global: Global
Data Length in Bytes: 2
Data Format: Direct
Type: Read Only
Default Value: N/A
Units: °C
Equation: READ_TEMPERATURE_2 = (Direct value)
COMMAND
READ_TEMPERATURE_2 (8Eh)
Format
Direct
Bit Position
15
14
13
12
11
10
Access
R
R
R
R
R
R
Function
Submit Document Feedback
9
8
7
6
5
4
3
2
1
0
R
R
R
R
R
R
R
R
R
R
Two’s Complement Integer
42
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September 28, 2016
ISL68134
READ_TEMPERATURE_3 (8Fh)
Definition: Returns the temperature reading from a remote diode connected to TMON1 when configured for diode sensing.
Paged or Global: Global
Data Length in Bytes: 2
Data Format: Direct
Type: Read Only
Default Value: N/A
Units: °C
Equation: READ_TEMPERATURE_3 = (Direct value)
COMMAND
READ_TEMPERATURE_3 (8Fh)
Format
Direct
Bit Position
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
Access
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
Function
Two’s Complement Integer
READ_POUT (96h)
Definition: Returns the output power.
Paged or Global: Paged
Data Length in Bytes: 2
Data Format: Direct
Type: Read Only
Default Value: N/A
Units: W
Equation: READ_POUT = (Direct value)
COMMAND
READ_POUT (96h)
Format
Direct
Bit Position
15
14
13
12
11
10
Access
R
R
R
R
R
R
Function
9
8
7
6
5
4
3
2
1
0
R
R
R
R
R
R
R
R
R
R
Two’s Complement Integer
READ_PIN (97h)
Definition: Returns the input power.
Paged or Global: Paged
Data Length in Bytes: 2
Data Format: Direct
Type: Read Only
Default Value: N/A
Units: W
Equation: READ_PIN = (Direct Value)
COMMAND
READ_PIN (97h)
Format
Direct
Bit Position
15
14
13
12
11
10
Access
R
R
R
R
R
R
Function
Submit Document Feedback
9
8
7
6
5
4
3
2
1
0
R
R
R
R
R
R
R
R
R
R
Two’s Complement Integer
43
FN8817.0
September 28, 2016
ISL68134
PMBUS_REVISION (98h)
Definition: Returns the revision of the PMBus Specification to which the device is compliant.
Data Length in Bytes: 1
Data Format: Bit Field
Type: Read Only
Default Value: 33h (Part 1 Revision 1.3, Part 2 Revision 1.3)
COMMAND
PMBUS_REVISION (98h)
Format
Bit Field
Bit Position
7
6
5
Access
R
R
R
Function
4
3
2
1
0
R
R
R
R
R
0
1
1
See Following Table
Default Value
0
0
1
1
0
BITS 7:4
PART 1 REVISION
BITS 3:0
PART 2 REVISION
0000
1.0
0000
1.0
0001
1.1
0001
1.1
0010
1.2
0010
1.2
0011
1.3
0011
1.3
IC_DEVICE_ID (ADh)
Definition: Returns device identification information.
Paged or Global: Global
Data Length in Bytes: 4
Data Format: Bit Field
Type: Block Read
Default Value: 49D21F00h
COMMAND
IC_DEVICE_ID (ADh)
Format
Block Read
Byte Position
3
2
1
0
Function
MFR code
ID High Byte
ID Low Byte
Reserved
Default Value
49h
D2h
1Fh
00h
IC_DEVICE_REV (AEh)
Definition: Returns device revision information.
Paged or Global: Global
Data Length in Bytes: 4
Data Format: Bit Field
Type: Block Read
Default Value: N/A
COMMAND
IC_DEVICE_REV (AEh)
Format
Block Read
Bit Position
23:16
15:8
7:4
3:0
Function
Firmware Revision
Factory Configuration
Chip Foundry Site
IC Revision
Default Value
N/A
N/A
N/A
N/A
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ISL68134
APPLY_SETTINGS (E7h)
Definition: Instructs the controller to utilize new PMBus parameters. Send 01h to this command after making one or more changes to
certain PMBus threshold commands that require rescaling of operational values. The commands that require this are
VOUT_TRANSITION_RATE, VOUT_DROOP, VOUT_OV_FAULT_LIMIT, VIN_OV_FAULT_LIMIT, VIN_UV_FAULT_LIMIT, IIN_OC_FAULT_LIMIT,
TON_RISE, and TOFF_FALL.
Paged or Global: Global
Data Length in Bytes: 2
Data Format: Bit Field
Type: Write Only
Default Value: 01h
Units: N/A
Equation: N/A
RESTORE_CONFIG (F2h)
Definition: Identifies the configuration to be restored from NVM and loads the store’s settings into the device’s active memory.
Paged or Global: Global
Data Length in Bytes: 1
Data Format: Bit Field
Type: Write Only
Default Value: N/A
COMMAND
RESTORE_CONFIG (F2h)
Format
Bit Field
Bit Position
7
6
5
Access
R/W
R/W
R/W
Function
4
3
2
1
0
R/W
R/W
R/W
R/W
R/W
N/A
N/A
N/A
See Following Table
Default Value
N/A
BIT NUMBER
N/A
N/A
N/A
STATUS BIT NAME
N/A
MEANING
7:4
Reserved
Reserved
3:0
CONFIG
Selected configuration to restore
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ISL68134
Adaptive Voltage Scaling (AVSBus) Functionality and Operation
The AVSBus interface provides a high speed (up to 50MHz) serial interface to the ISL68134 allowing implementation of advanced
voltage scaling functions supporting increased system efficiency and performance. Devices equipped with AVSBus master capability
may use the interface to enable rapid supply voltage changes to support low power consumption modes as well as high performance
modes. Due to the advanced digital regulation loop employed, the ISL68134 is well equipped to support very rapid transition rates. All
commands are readable at all times, but they cannot be written to unless the device is set to AVSBus control.
AVSBus Master Send Subframe
FUNCTION
Start Code
R/W
Command Type
Command Code
Rail Select
Command Data
CRC
SIZE (bits)
2
2
1
4
4
16
3
01b
00b = Write data
and Commit
11b = Read Data
SETTING
0h = Rail 0
1h = Rail 1
Fh = Broadcast
0b = AVSBus Data 0h = Target Rail Voltage
1h = Transition Rate
2h = Rail Current
3h = Temperature
4h = Voltage Reset
Eh = AVSBus Status
Fh = AVSBus Version
Read = FFh
Write = See “AVSBus
Command Detail”
Section
AVSBus Slave Response Subframe
FUNCTION
Slave Ack
0b
2
1
SIZE (bits)
SETTING
Status Response
Command Data
Not Used
CRC
16
5
3
5
00b = Command acknowledged, 0b
Action Taken
01b = Command acknowledged,
No action
10b = Bad CRC, No Action
11b = Invalid Request, No Action
Bit 5 = VDONE. Sets to 1 when VOUT target is reached
Bit 4 = Status Alert. Sets to 1 if a bit in AVSBus Status
register (excluding from VDONE) has set
Bit 3 = AVSBus Control. Sets to 1 when AVSBus control
is enabled
Bits 2:0 = Not used
Write = FFh
Not used
Read = See
11111b
“AVSBus
Command Detail”
Section
AVSBus Command Detail
TARGET RAIL VOLTAGE (0h)
Definition: Set or read the target rail voltage set point. 1mV per LSB. The initial set point is copied from the PMBus™ command
VOUT_COMMAND when AVSBus operation is selected.
Paged or Global: Paged
Data Length in Bytes: 2
Data Format: Direct
Type: R/W
Default Value: Value of PMBus VOUT_COMMAND
Units: mV
Equation: TARGET RAIL VOLTAGE = (Direct value)
Range: Limited to the values of VOUT_MIN and VOUT_MAX PMBus commands
COMMAND
TARGET RAIL VOLTAGE (0h)
Format
Direct
Bit Position
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
Access
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
Function
Submit Document Feedback
Two’s Complement Integer
46
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ISL68134
TRANSITION RATE (1h)
Definition: Set or read the rise and fall transition rates. 1mV/µs per LSB. The initial value matches PMBus transition rates until updated
through AVSBus.
Paged or Global: Paged
Data Length in Bytes: 2
Data Format: Direct
Type: R/W
Default Value: Value of PMBus VOUT_TRANSITION_RATE for rise and fall
Units: mV/µs
Equation: TRANSITION RATE = (Direct value)
COMMAND
TRANSITION RATE (1h)
Format
Direct
Bit Position
15
Access
R
Function
Default Value
14
13
12
11
10
9
8
7
R
R
R
R
R
R
R
R
Rise Transition Rate, two’s complement integer
0
0
0
0
0
0
0
6
5
4
3
2
1
0
R
R
R
R
R
R
R
Fall Transition Rate, two’s complement integer
0
0
0
0
0
0
0
0
0
RAIL CURRENT (2h)
Definition: Returns the output current reading. 10mA per LSB. A filter is applied to this reading, and it is configurable in the
PowerNavigator™.
Paged or Global: Paged
Data Length in Bytes: 2
Data Format: Direct
Type: Read Only
Default Value: N/A
Units: A
Equation: RAIL CURRENT= (Direct value)/100
COMMAND
RAIL CURRENT (2h)
Format
Direct
Bit Position
15
14
13
12
11
10
Access
R
R
R
R
R
R
Function
9
8
7
6
5
4
3
2
1
0
R
R
R
R
R
R
R
R
R
R
Two’s Complement Integer
TEMPERATURE (3h)
Definition: Returns the power stage temperature reading. 0.1°C per LSB. This value is copied from the READ_TEMPERATURE_1 PMBus
command.
Paged or Global: Paged
Data Length in Bytes: 2
Data Format: Direct
Type: Read Only
Default Value: N/A
Units: °C
Equation: TEMPERATURE = (Direct value)/10
COMMAND
TEMPERATURE (3h)
Format
Direct
Bit Position
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
Access
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
Function
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Two’s Complement Integer
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FN8817.0
September 28, 2016
ISL68134
VOLTAGE RESET (4h)
Definition: Sets TARGET RAIL VOLTAGE to match that of the VOUT_COMMAND PMBus command.
Paged or Global: Paged
Data Length in Bytes: 2
Data Format: Direct
Type: Write Only
Default Value: 00h
Units: N/A
COMMAND
VOLTAGE RESET (4h)
Format
Direct
Bit Position
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
Access
W
W
W
W
W
W
W
W
W
W
W
W
W
W
W
W
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Function
Default Value
Send all 0’s
0
0
AVSBus STATUS (Eh)
Definition: Returns the device status. VDONE indicates that VOUT has reached the set point. OT Warn indicates that one or more of the
device’s measured temperatures has exceeded the over temperature warning threshold set by the OT_WARN_LIMIT PMBus command.
The device sets the AVS_SDA line low to notify the host any time a bit in this register has been set.
Paged or Global: Paged
Data Length in Bytes: 2
Data Format: Bit Field
Type: R/W
Default Value: N/A
Units: N/A
COMMAND
AVSBUS STATUS (Eh)
Format
Bit Field
Bit Position
15
14
13
12
11:0
Access
R
R
R
R
R
Function
VDONE
Not Used
Not Used
OT Warn
Not Used
Default Value
N/A
0
0
N/A
0
AVSBus VERSION (Fh)
Definition: Returns the version of the AVSBus specification to which the device is compliant. This device complies with Version 1.3.
Paged or Global: Global
Data Length in Bytes: 2
Data Format: Bit Field
Type: Read Only
Default Value: 00h
Units: N/A
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ISL68134
Revision History
c
The revision history provided is for informational purposes only and is believed to be accurate, however, not
warranted. Please go to web to make sure you have the latest revision.
DATE
REVISION
September 28, 2016
FN8817.0
CHANGE
Initial Release
About Intersil
Intersil Corporation is a leading provider of innovative power management and precision analog solutions. The company's products
address some of the largest markets within the industrial and infrastructure, mobile computing and high-end consumer markets.
For the most updated datasheet, application notes, related documentation and related parts, please see the respective product
information page found at www.intersil.com.
You may report errors or suggestions for improving this datasheet by visiting www.intersil.com/ask.
Reliability reports are also available from our website at www.intersil.com/support.
For additional products, see www.intersil.com/en/products.html
Intersil products are manufactured, assembled and tested utilizing ISO9001 quality systems as noted
in the quality certifications found at www.intersil.com/en/support/qualandreliability.html
Intersil products are sold by description only. Intersil Corporation reserves the right to make changes in circuit design, software and/or specifications at any time
without notice. Accordingly, the reader is cautioned to verify that data sheets are current before placing orders. Information furnished by Intersil is believed to be
accurate and reliable. However, no responsibility is assumed by Intersil or its subsidiaries for its use; nor for any infringements of patents or other rights of third
parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of Intersil or its subsidiaries.
For information regarding Intersil Corporation and its products, see www.intersil.com
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Package Outline Drawing
For the most recent package outline drawing, see L40.5x5D.
L40.5x5D
40 LEAD THIN QUAD FLAT NO-LEAD PLASTIC PACKAGE
Rev 0, 9/10
4X 3.60
5.00
36X 0.40
A B
6
PIN #1 INDEX AREA
5.00
3.65
6
PIN 1
INDEX AREA
(4X)
0.15
40X 0.4± 0.1
TOP VIEW
b
BOTTOM VIEW
0.20
0.10 M
C A B
4
PACKAGE OUTLINE
0.40
SEE DETAIL "X"
0.750
// 0.10 C
C
BASE PLANE
SEATING PLANE
0.08 C
0.050
3.65
5.00
SIDE VIEW
(36X 0.40)
(40X 0.20)
5
C 0.2 REF
(40X 0.60)
0.00 MIN
0.05 MAX
TYPICAL RECOMMENDED LAND PATTERN
DETAIL "X"
NOTES:
1.
Dimensions are in millimeters.
Dimensions in ( ) for Reference Only.
2.
Dimensioning and tolerancing conform to ASME Y14.5m-1994.
3.
Unless otherwise specified, tolerance : Decimal ± 0.05
4.
Dimension b applies to the metallized terminal and is measured
between 0.15mm and 0.27mm from the terminal tip.
5.
Tiebar shown (if present) is a non-functional feature.
6.
The configuration of the pin #1 identifier is optional, but must be
located within the zone indicated. The pin #1 identifier may be
7.
JEDEC reference drawing: MO-220WHHE-1
either a mold or mark feature.
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FN8817.0
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