an1781

Application Note 1781
Author: Barry Kates
ZL8101_30AEV2Z 30A Demo Board
Description
Key Features
The ZL8101 is an integrated mixed-signal power conversion
and management IC that combines an efficient step-down
DC/DC converter with key power and thermal management
functions in a single package. The ZL8101 incorporates
current sharing and adaptive efficiency-optimization
algorithms to provide a flexible, efficient power IC building
block.
• 30A Synchronous Buck Converter
• Optimized for High Current and High Efficiency
• Configurable through SMBus
• Onboard Enable Switch
• Power-Good Indicator
Target Specifications
The ZL8101_30AEV2Z Demo Board is a 6-layer board
demonstrating a 30A synchronous buck converter.
Sequencing, tracking, margining, plus other features can be
evaluated using this board.
• VIN = 12V
• VOUT = 1V/30A
• FSW = 533kHz
A USB to SMBus adapter board can be used to connect the
demo board to a PC. The PMBus command set is accessed by
using the Zilker Labs PowerNavigator™ evaluation software
from a PC running Microsoft Windows.
• Efficiency: >88% at 20A
• Output Ripple: ±1%
• Dynamic Response: ±3% (33%-83%-33% LOAD STEP,
di/dt = 5A/μs)
Ordering Information
PART NUMBER
• Operating Temperature: +25°C
DESCRIPTION
ZL8101_30AEV2Z
30A Single Phase Demo Board
VIN
VDRV
R1
U1
ZL8101
DDC
SCL
SDA
SYNC
PG
EN
VTRK_IN
VDD
DDC
SCL
SDA
SYNC
PG
EN
VTRK
PWMH
DRVCTL
VR
V25
SG
C12
L1
PWMH
DRVCTL
R2
VMON
R3
U2
CSD96370Q5M
PAD
ISENA
ISENB
FB+
FBDGND
VOUT
C6
ISENA
ISENB
FB+
FB-
COUT
C11
SG
FIGURE 1. ZL8101_30AEV2Z 30A DEMO BOARD SIMPLIFIED SCHEMATIC
September 6, 2012
AN1781.0
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 Inc. 2012. All Rights Reserved.
Intersil (and design), Zilker Labs (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.
Application Note 1781
Functional Description
The ZL8101_30AEV2Z 30A Demo Board provides all circuitry
required to demonstrate the features of the ZL8101. The ZL8101
30A has a functionally optimized ZL8101 circuit layout that
allows efficient operation up to the maximum output current.
Power and load connections are provided through plug-in
sockets.
A majority of the features of the ZL8101 such as soft-start delay
and ramp times, supply sequencing, voltage tracking, and
voltage margining are available on this board. For voltage
tracking and sequencing evaluation, the board can be connected
to any other Zilker Labs evaluation boards that supports the
Digital DC (DDC) bus.
Figure1 shows a simplified schematic of the ZL8101_30AEV2Z
30A Demo Board. All power to the board (VIN and I2C bus) must
be removed before changing the jumpers.
The hardware enable function is controlled by a toggle switch on
the ZL8101_30AEV2Z 30A board. The power-good (PG) LED
indicates the state of PG when external power is applied to the
ZL8101_30AEV2Z 30A board. The right angle headers at
opposite ends of the board are for connecting a USB to SMBus
adapter board or for easy chaining of multiple evaluation boards.
Figure 2 shows the ZL8101_30AEV2Z 30A Demo Board
complete circuit. The circuit consists of the ZL8101 IC with its
minimal component count to realize a 30A buck converter. The
board layout has been optimized for thermal performance.
Figure 3 is the board interface circuitry. Figures 5 through 10
show the PCB layout for the board, including the board
fabrication notes.
The bill of materials (BOM) and configuration file are also
included for reference.
Operation
The ENABLE switch can then be moved to “ENABLE” and the
ZL8101_30AEV2Z 30A Demo board can be tested. Alternately,
the PMBus ON-OFF CONFIG and OPERATION commands may be
used.
Quick Start Guide
Stand Alone Operation
1. Set ENABLE switch to “DISABLE”.
2. Apply load to VOUT+/VOUT- .
3. Connect the USB to SMBus adapter board to J2 of the board.
4. Ensure that jumper shorting headers J1, J6, and J7 are
installed.
5. Connect supplied USB cable from computer to USB to SMBus
adapter board.
6. Connect power supply to VIN+/VIN- (supply turned off).
7. Turn power supply on.
8. Set ENABLE switch to “ENABLE”.
9. Monitor the ZL8101_30AEV2Z 30A demo board operation
using an oscilloscope.
USB (PMBus) Operation
1. Set ENABLE switch to “DISABLE”.
2. Apply load to VOUT+/VOUT- .
3. Connect power supply to VIN+/VIN- (supply turned off).
4. Turn power supply on.
5. Insert the Zilker Labs Eval Kit CD.
6. Connect USB to SMBus adapter board to J2 of
ZL8101_30AEV2Z 30A Demo Board.
7. Connect supplied USB cable from computer to USB to SMBus
adapter board.
8. Upon first-time connection, the Found New Hardware Wizard
will appear.
PMBus Operation
9. Select ‘No’ at prompt to search the Internet for drivers.
The ZL8101 utilizes the PMBus protocol. The PMBus functionality
can be controlled via USB from a PC running the PowerNavigator
evaluation software in a Windows XP, Windows 2000/NT, or
Windows 7 operating system.
10. Follow the steps on the screen to install the drivers from the
CD.
Install the evaluation software using the CD included in the
ZL8101_30AEV2Z 30A Demo Board kit.
12. Using PowerNavigator, set the enable mode to PMBus Enable,
press the PMBus Enable button on the PowerNavigator
opening screen.
For board operation, connect the included USB-to-SMBus adapter
board to J2 of the ZL8101_30AEV2Z 30A Demo board. Connect
the desired load and an appropriate power supply to the input
and connect the included USB cable to the PC running the
PowerNavigator evaluation software. Place the ENABLE switch in
“DISABLE” and turn on the power.
The evaluation software allows modification of all ZL8101
PMBus parameters. The ZL8101 device on the board has been
pre-configured as described in the Target Specifications on the
front page, but the user may modify the operating parameters
through the PowerNavigator software or by loading a predefined
scenario from a configuration file.
11. Install the PowerNavigator evaluation software by running
setup.exe from the PowerNavigator_installer folder on the CD.
13. Monitor and configure the ZL8101_30AEV2Z 30A Demo
Board using PMBus commands in the evaluation software.
14. Test the ZL8101_30AEV2Z 30A Demo Board operation using
an oscilloscope and the evaluation software.
Typical room temp efficiency curves are shown in Figure 11.
Typical transient and operational waveforms are shown in
Figures 12 through 15.
Use the mouse-over pop-ups for PowerNavigator help. Refer to
Zilker Labs application note AN2033 for PMBus details.
2
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September 6, 2012
Board Schematics
VIN
VIN
FB1
1000 Ohm
D2
RB521S30
Q1
FMMTL618TA
VDRV
C1
10uF
25V
C15
22uF
16V
VDRV
3
R1
100K
VTRK_IN
VTRK_IN
MGN
MGN
U1
ZL8101
27
6
7
2
32
30
8
14
31
28
12
C4
10uF
10V
C3
10uF
10V
SG
U2
CSD96370Q5M
24
26
5
VDD XTEMP NC
DDC
SCL
SDA
SY NC
PG
EN
SALRT
VTRK
SS
MGN
VMON
3 171615141312
23
VR
FC
PWML
PWMH
DRVCTL
NC
NC
ISENA
ISENB
FB+
FBSA1
2
4
9
20
22
13
29
17
19
18
15
16
4
PWMH
DRVCTL
22
1
SENA
SENB
5
20
21
18
19
11
10
9
8
7
6
23
C5
1uF
16V
VOUT
L1
0.220nH
R2
1.18K
C6
1uF
10V
SG PAD V1 V25 V0 SA0 DGND
21 33 11 25 10 3
1
C10
0.01uF
25V
R3
6.65K
P3
VOUT
C8
100uF
6.3V
C9
100uF
6.3V
C7
680uF
4V
C24
680uF
4V
FB+
FB-
C11
10uF
10V
XX5
Address set to 0x24
Vout set to 3.3V
P4
SG
FIGURE 2. ZL8101_30AEV2Z 30A DEMO BOARD COMPLETE CIRCUIT
Application Note 1781
DDC
SCL
SDA
SY NC
PG
EN
DDC
SCL
SDA
SYNC
PG
EN
C2
4.7uF
25V
AN1781.0
September 6, 2012
Board Schematics (Continued)
R7
4.75k
SCL SALRT SDA
VAUX
DDC VTRK
VDRV
SDA
SCL
VI2C
SALRT
SDA
R9
FROM PREQUEL4.75k
J2
2
1
4
3
6
5
8
7
10
9
R10
4.75k
U5
REG1117A
J7
1
DDC
R11
R12
VTRK_IN
DDC
49.9 MSTR_EN
SY NC
PG_0
49.9
2
3
N
I
R
D
V
SCL
VI2C
SALRT
R8
4.75k
VTRK_IN
DDC
HEADER
4
TO SEQUEL
J3
2
1
4
3
6
5
8
7
10
9
VOUT
1
2
+
VDRV
-
G-ADJ
1
C25
10uF
25V
SY NC
VDRV
J1
2
VOUT 4
VOUT
VIN
︳
R28
909
R29
2.74K
MSTR_SYNC
R6
4.75k
C12
100uF
6.3V
C16
22uF
16V
P1
VOUT
VIN
PG
PG
3
4
6
1
D4
ESDA6V1-4BC6
3
4
6
J5
2
1
2
3
VIN
D5
ESDA6V1-4BC6
5
2
5
1
EN
EN
C13
330u
16V
C14
330u
16V
P2
JACK_BARREL
2
3
4
R13
100K
VAUX
D1
GRN
Enable_1
R4
10.0K
R5
392
3
2
1
Disable
Monitor
Enable
SW1
PG
Q2
2N7002/SOT
U3
REG1117A
J6
2
R14
49.9
1
3
R15
10.0K
MSTR_EN
R16
49.9
JP1
C23
1uF
25V
VAUX
D9
BAT54
VI2C
R18
115
C18
10uF
25V
FIGURE 3. ZL8101_30AEV2Z 30A DEMO BOARD – INTERFACE CIRCUITRY
D8
BAT54
VAUX
G-ADJ
1
HW_EN
R17
49.9 C21
0.1uF
10V
D7
BAT54
2
VOUT 4
VOUT
VIN
R19
187
C22
10uF
25V
C19
0.1u
10V
C20
10u
25V
Application Note 1781
+
VIN
-
VIN
SOCKET
1
AN1781.0
September 6, 2012
Application Note 1781
12 13
1 6 14
1 11
17
10 18
9
2 20 2 1 8
19 22 15
7 3 4 5 6 FIGURE 4. ZL8101_30AEV2Z 30A DEMO BOARD GUIDE
The top view of the ZL8101_30AEV2Z 30A Demo Board is shown
in Figure 4, and the most important parts of the board are
covered in Table 1
5
AN1781.0
September 6, 2012
Application Note 1781
TABLE 1. COMMENTS ABOUT DIFFERENT PARTS IN THE ZL8101_30AEV2Z 30A DEMO BOARD
ITEM
QUANTITY
REFERENCE
VALUE
TOLERANCE
RATING
1
1
C1
±10%
25V
2
1
C2
3
3
C3, C4, C11
4.7µF
±10%
25V
X7R
10µF
±10%
10V
X7R
4
1
C5
1µF
±10%
16V
X7R
5
1
C6
1µF
10%
10V
6
2
C7, C24
680µF
20%
4V
7
3
C8, C9, C12
100µF
6.3V
X5R
Taiyo Yuden
JMK325BJ107MY-T
Digikey
587-1388-2-ND
8
1
C10
0.01µF
±10%
25V
X7R
Kemet
C0402C103K3RACTU
Digikey
399-1278-2-ND
9
2
C13, C14
330µ
20%
16V
AL POLY
United Chemi-Con
APXA160ARA331MJC0G
Digikey
565-3081-2-ND
10
2
C15, C16
22µF
20%
16V
X5R
Murata
GRM31CR61C226ME15L
Digikey
490-4739-2-ND
11
3
C18, C22,
C25
10µF
10%
25V
X5R
Panasonic - ECG
ECJ-3YB1E106K
Digikey
PCC2414TR-ND
12
1
C19
0.1µ
10%
10V
X7R
Kemet
C0603C104K8RACTU
Digikey
399-1095-2-ND
13
1
C20
10µ
10%
25V
X5R
Panasonic - ECG
ECJ-3YB1E106K
Digikey
PCC2414TR-ND
14
1
C21
0.1µF
10%
10V
X7R
Kemet
C0603C104K8RACTU
Digikey
399-1095-2-ND
15
1
C23
1µF
10%
25V
X5R
Taiyo Yuden
TMK107BJ105KA-T
Digikey
587-1248-2-ND
16
1
D1
GRN
2V
Chicago Minature
CMD17-21VGC
Mouser
606-CMD17-21VGC
17
1
D2
RB521S30
30V
ON SEMI
RB521S30
Digikey
RB521S30CT-ND
18
2
D4, D5
ST Micro
ESDA6V1-4BC6
Digikey
497-4643-2-ND
19
3
D7, D8, D9
BAT54
30V
On Semi
BAT54XV2T1OS
Digikey
BAT54XV2T1OSTR-ND
20
1
FB1
1000 Ω
150mA
21
1
JP1
4 PIN
22
3
J1, J6, J7
2 POS
23
1
J2
24
1
25
1
26
1
L1
0.220nH
70
27
2
P1, P2
JACK_DUAL_BANANA
15A
28
2
P3, P4
JACK_BANANA_1
29
1
Q1
FMMTL618TA
20V
NPN
Diodes Inc
30
1
Q2
2N7002/SOT
60V 115mA
N-CH
10µF
ESDA6V1-4BC6
TYPE
X7R
MANUFACTURER
DISTRIBUTOR
DIST. PN
TMK316B7106KL-TD
Digikey
587-2399-2-ND
AVX
0805YC475KAT2A
Digikey
478-5722-1-ND
Murata
GRM21BR71A106KE51L
Digikey
490-3905-2-ND
Kemet
C0603C105K4RACTU
Digikey
C0603C105K4RACTU-ND
X7R
Taiyo Yuden
LMK107B7105KA-T
Digikey
587-1242-2-ND
AL POLY
Kemet
T530Y687M004ATE005
Digikey
399-4750-1-ND
Schottky
6.1V, 80W
Schottky
Taiyo Yuden
BK1005HM102-T
Digikey
587-1835-2-ND
Tyco
3-644456-4
Digikey
A31114-ND
VERT
Samtec
TSW-102-07-L-S
Digikey
SAM1031-02-ND
HEADER
RA
Samtec
TSW-105-08-T-D-RA
Digikey
SAM1049-05-ND
J3
SOCKET
RA
Samtec
SSQ-105-02-T-D-RA
Digikey
SAM1224-05-ND
J5
JACK_BARREL
RA
Kobiconn
163-5004-E
Mouser
163-5004-E
1.5A @ 18VDC
Ferrite
Taiyo Yuden
PART NUMBER
Inductor
ITG
SL3732_R22KHF
ITG
SL3732_R22KHF
Emerson
108-0740-001
Digikey
J147-ND
Digikey
J147-ND
FMMTL618TA
Digikey
FMMTL618CT-ND
ON SEMI
2N7002LT1
Digikey
2N7002LT1OSTR-ND
31
1
R1
100k
1%
1/16W
Vishay/Dale
CRCW0402100KFKED
Digikey
541-100KLTR-ND
32
1
R2
1.18k
1%
Resistor
Panasonic - ECG
ERJ-3EKF1181V
Digikey
P1.18KHTR-ND
33
1
R3
6.65k
1%
1/16W
Panasonic - ECG
ERJ-2RKF6651X
Digikey
P6.65KLTR-ND
34
1
R4
10.0k
1%
1/16W
Yageo
RC0402FR-0710KL
Digikey
311-10.0KLRTR-ND
35
1
R5
392
1%
THK FILM
Panasonic - ECG
ERJ-3EKF3920V
Digikey
P392HTR-ND
36
5
R6, R7, R8,
R9, R10
4.75k
1%
1/16W
Panasonic - ECG
ERJ-2RKF4751X
Digikey
P4.75KLTR-ND
37
4
R11, R12,
R16, R17
49.9
1%
100mW
THK FILM
Panasonic - ECG
ERJ-3EKF49R9V
Digikey
P49.9HTR-ND
38
1
R13
100k
1%
63mW
THK FILM
Panasonic - ECG
ERJ-2RKF1003X
Digikey
P100KLTR-ND
39
1
R14
49.9
1%
63mW
THK FILM
Vishay/Dale
CRCW040249R9FKED
Digikey
541-49.9LTR-ND
40
1
R15
10.0k
1%
63mW
THK FILM
Panasonic - ECG
ERJ-2RKF1002X
Digikey
P10.0KLTR-ND
41
1
R18
115
1%
100mW
THK FILM
Panasonic - ECG
ERJ-3EKF1150V
Digikey
P115HTR-ND
6
AN1781.0
September 6, 2012
Application Note 1781
TABLE 1. COMMENTS ABOUT DIFFERENT PARTS IN THE ZL8101_30AEV2Z 30A DEMO BOARD (Continued)
ITEM
QUANTITY
REFERENCE
TOLERANCE
RATING
TYPE
42
1
R19
187
VALUE
1%
100mW
THK FILM
Panasonic - ECG
ERJ-3EKF1870V
Digikey
P187HTR-ND
43
1
R28
909
1%
100mW
THK FILM
Panasonic - ECG
ERJ-3EKF9090V
Digikey
P909HTR-ND
44
1
R29
2.74k
1%
100mW
THK FILM
Panasonic - ECG
ERJ-3EKF2741V
Digikey
P3.32KHTR-ND
45
1
SW1
SW_SPDT
PCB VERT
NKK
G13AP-RO
Mouser
633-G13AP-RO
53
1
U1
ZL8101
54
1
U2
CSD96370Q5M
55
2
U3, U5
REG1117A
7
25V
MANUFACTURER
PART NUMBER
DISTRIBUTOR
DIST. PN
Intersil
ZL8101
Intersil
ZL8101
Texas
Instruments
CSD96370Q5M
Digikey
296-28235-2-ND
Texas
Instruments
REG1117A
Digikey
REG1117A-ND
AN1781.0
September 6, 2012
Application Note 1781
Board Layout – 6 Layers
FIGURE 5. PCB - TOP LAYER
8
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September 6, 2012
Application Note 1781
Board Layout – 6 Layers (Continued)
FIGURE 6. PCB - INNER LAYER 1 (VIEWED FROM TOP)
9
AN1781.0
September 6, 2012
Application Note 1781
Board Layout – 6 Layers (Continued)
FIGURE 7. PCB - INNER LAYER 2 (VIEWED FROM TOP)
10
AN1781.0
September 6, 2012
Application Note 1781
Board Layout – 6 Layers (Continued)
FIGURE 8. PCB - INNER LAYER 3 (VIEWED FROM TOP)
11
AN1781.0
September 6, 2012
Application Note 1781
Board Layout – 6 Layers (Continued)
FIGURE 9. PCB - INNER LAYER 4 (VIEWED FROM TOP)
12
AN1781.0
September 6, 2012
Application Note 1781
Board Layout – 6 Layers (Continued)
FIGURE 10. PCB - BOTTOM LAYER (VIEWED FROM TOP)
13
AN1781.0
September 6, 2012
Application Note 1781
Default Configuration Text
The following text is loaded into the ZL8101 device on the board as default settings. Each PMBus command is loaded via the
PowerNavigator software. The # symbol is used for a comment line.
# Zilker Labs 8101 6/7/2012
# ZL Configuration File Revision A
# Schematic revision level
# BOM revision level
# Change log:
RESTORE_FACTORY
STORE_USER_ALL
STORE_DEFAULT_ALL
MFR_ID
MFR_MODEL
MFR_REVISION
MFR_LOCATION
MFR_DATE
MFR_SERIAL
VOUT_COMMAND
FREQUENCY_SWITCH
POWER_GOOD_DELAY
IOUT_SCALE
IOUT_CAL_OFFSET
TON_DELAY
TON_RISE
TOFF_DELAY
TOFF_FALL
VOUT_OV_FAULT_RESPONSE
VOUT_UV_FAULT_RESPONSE
OVUV_CONFIG
IOUT_OC_FAULT_LIMIT
IOUT_AVG_OC_FAULT_LIMIT
IOUT_UC_FAULT_LIMIT
IOUT_AVG_UC_FAULT_LIMIT
MFR_IOUT_OC_FAULT_RESPONSE
MFR_IOUT_UC_FAULT_RESPONSE
MFR_VMON_OV_FAULT_LIMIT
VMON_OV_FAULT_RESPONSE
MFR_VMON_UV_FAULT_LIMIT
VMON_UV_FAULT_RESPONSE
VIN_OV_WARN_LIMIT
VIN_OV_FAULT_LIMIT
VIN_OV_FAULT_RESPONSE
VIN_UV_WARN_LIMIT
VIN_UV_FAULT_LIMIT
VIN_UV_FAULT_RESPONSE
OT_WARN_LIMIT
OT_FAULT_LIMIT
OT_FAULT_RESPONSE
UT_WARN_LIMIT
UT_FAULT_LIMIT
14
Zilker_Labs
30A
REV_A
Austin
8/2012
1p0V_35A
1.0
533
5
0.30
-2.0
5
5
5
5
0x80
0x80
0x80
50
45
-40
-40
0x80
0x80
7.0
0x80
4.5
0x80
14.3
14.5
0x80
4.2
4.0
0x80
110.0
125
0x80
-20
-40
AN1781.0
September 6, 2012
Application Note 1781
UT_FAULT_RESPONSE
DEADTIME
DEADTIME_CONFIG
DEADTIME_MAX
MAX_DUTY
TRACK_CONFIG
INTERLEAVE
#SEQUENCE
MFR_CONFIG
NLR_CONFIG
TEMPCO_CONFIG
MISC_CONFIG
ISHARE_CONFIG
AUTO_COMP_CONFIG
PID_TAPS
USER_CONFIG
DDC_GROUP
#DDC_CONFIG
INDUCTOR
ON_OFF_CONFIG
STORE_DEFAULT_ALL
RESTORE_DEFAULT_ALL
0x00
0x0C0C
0x8686
0x0C0C
94
0x00
0x0000
0x0000
0x6A10
0x00000000
0x28
0x2000
0x0000
0x79
A=6504.62, B=-11568.50, C=5078.00
0x0011
0x00000000
0x0000
0.22
0x1A
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Application Note 1781
Measured Data The following data was acquired using a ZL8101_30AEV2Z 30A Demo Board.
EFFICIENCY
96
VOUT = 2.5V
EFFICIENCY (%)
91
VOUT = 3.3V
VOUT = 1.8V
VOUT = 1.2V
86
VOUT = 1V
81
76
2
4
6
8
10
12
14
16
18
20
22
24
26
28
30
32
34
36
OUTPUT CURRENT (A)
FIGURE 11. EFFICIENCY FOR DIFFERENT OUTPUT VOLTAGES, VIN = 12V, F SW = 533kHz
TURNON RAMP
VIN = 12V, VOUT = 1V, FSW = 533kHz, IOUT = 15A
TRISE = 5ms, MIN DUTY = DISABLED
AUTOCOMP = OFF
5ms
MINIMUM DUTY CYCLE ARTIFACT
~100mV
FIGURE 12. RAMP UP
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Application Note 1781
TURN OFF RAMP
VIN = 12V, VOUT = 1V, FSW = 533kHz, IOUT = 15A
TFALL= 5ms, MIN DUTY = DISABLED
AUTOCOMP = OFF
VOUT
5ms
FIGURE 13. RAMP DOWN
TRANSIENT RESPONSE
VIN = 12V, VOUT = 1V, FSW = 533kHz, ΔI = 10A
AUTOCOMP = ON, TAPS A = 8728.25
B = 14684.25, C = 5966.00
55mVP-P
VOUT, MEASURED ACROSS C7
DYNAMIC LOAD CURRENT
di/dt = 5A/µs
IMIN = 15A, IMAX = 25A
FIGURE 14. DYNAMIC RESPONSE, 10A TO 25A (AND VICE VERSA) LOAD STEP
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Application Note 1781
STATIC RIPPLE MEASURED ACROSS C24
VIN = 12V, VOUT = 1V, FSW = 533kHz, IOUT = 15A
VOUT = 10mVP-P
SWITCH NODE USED AS
SYNC SIGNAL
FIGURE 15. OUTPUT VOLTAGE RIPPLE WHEN VO = 1V, IO = 25A, V IN = 12V, F sw= 800kHZ
References
[1] ZL8101 Data Sheet, Zilker Labs, Inc., 2012.
[2] AN2033 – PMBus™ Command Set, Zilker Labs, Inc., 2009.
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 the Application Note or Technical Brief is current before proceeding.
For information regarding Intersil Corporation and its products, see www.intersil.com
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