DC2269A-A - Demo Manual

DEMO MANUAL DC2269A-A
LTM4676EY
Dual Step-Down µModule Regulator
with PMBus Power System Management
Description
Demonstration circuit 2269A-A is a dual-output, high efficiency, high density, µModule® supply on a small 1.5"×1.2"
PCB board with 4.5V to 26.5V input range. Each output
can supply 13A maximum load current. The demo board
has a LTM®4676 µModule regulator, which is a dual 13A
or single 26A step-down regulator with PMBus power
system management. The DC2269A can be easily inserted
to an edge connector for testing and debugging. It has an
optional input filter inductor (L1) to further reduce input
ripple EMI noise.
LTC’s I2C/SMBus/PMBus dongle DC2086A together with
DC1613A to connect to the board. LTpowerPlay allows
the user to reconfigure the part on the fly and store the
configuration in EEPROM, view telemetry of voltage, current, temperature and fault status.
DC2269A-A powers up to default settings and produce
power based on configuration resistors without the need
for any serial bus communication. This allows easy evaluation of the DC/DC converter. To fully explore the extensive
power system management features of the part, download
the GUI software LTpowerPlay™ onto your PC and use
For more details and instructions of LTpowerPlay, please
refer to LTpowerPlay GUI for LTM4676 Quick Start Guide.
Performance Summary
PARAMETER
GUI Download
The software can be downloaded from:
http://www.linear.com/ltpowerplay
Design files for this circuit board are available at
http://www.linear.com/demo/DC2269A-A
L, LT, LTC, LTM, Linear Technology, the Linear logo and µModule are registered trademarks
and LTpowerPlay is a trademark of Linear Technology Corporation. All other trademarks are the
property of their respective owners.
Specifications are at TA = 25°C
CONDITIONS
Input Voltage Range
VALUE
4.5V to 26.5V
Output Voltage, VOUT0
VIN = 4.5V to 26.5V, IOUT0 = 0A to 13A
Maximum Output Current, IOUT0
VIN = 4.5V to 26.5V, VOUT = 0.5V to 4V
13A
Output Voltage, VOUT1
VIN = 4.5V to 26.5V, IOUT1 = 0A to 13A
0.5V to 5.4V, Default: 1.8V
Maximum Output Current, IOUT1
VIN = 4.5V to 26.5V, VOUT = 0.5V to 5.4V
Typical Efficiency
VIN = 12V, VOUT = 1.8V, IOUT = 13A
Default Switching Frequency
0.5V to 4V, Default: 1V
13A
86.3%
500kHz
Figure 1. Dual-Output LTM4676/DC2269A-A Demo Circuit
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1
DEMO MANUAL DC2269A-A
Quick Start Procedure
Table 1. LTM4676 Demo Cards for Up to 100A Point-of-Load Regulation
MAXIMUM OUTPUT CURRENT
NUMBER OF OUTPUT
VOLTAGES
NUMBER OF LTM4676 µMODULE
REGULATORS ON THE BOARD
DEMO BOARD NUMBER
13A, 13A
2
1
DC1811A
13A, 13A
2
1
DC2269A-A
26A
1
1
DC2087A
50A
1
2
DC1989A-A
75A
1
3
DC1989A-B
100A
1
4
DC1989A-C
100A
1
1 + (3× LTM4620A)
DC2106A-A
130A
1
1 + (3× LTM4630)
DC2106A-B
DC2269A-A is easy to set up to evaluate the performance
of the LTM4676EY. It can be easily inserted to an edge
connector (SAMTEC MEC2-20-01-L-DV--TR) for testing
and debugging. Refer to Figure 2 for the proper measurement equipment setup and follow the procedure below.
1.With power off, connect the input power supply to VIN
(4.5V-26.5V) and GND (input return).
2.Connect the 1.0V output load between VOUT and GND
(Initial load: no load).
3.Connect the 1.8V output load between VOUT and GND
(Initial load: no load).
4.Connect the DVMs to the input and outputs.
5.Turn on the input power supply and check for the proper
output voltages. VOUT0 should be 1.0V ±1%, and VOUT1
should be 1.8 ±1%.
Note: When measuring the output or input voltage ripple,
do not use the long ground lead on the oscilloscope probe.
See Figure 3 for the proper scope probe technique. Short,
stiff leads need to be soldered to the (+) and (–) terminals
of an output capacitor. The probe’s ground ring needs to
touch the (–) lead and the probe tip needs to touch the
(+) lead.
Connecting a PC to DC2269A-A
You can use a PC to reconfigure the power management
features of the LTM4676 such as: nominal VOUT, margin
set points, OV/UV limits, temperature fault limits, sequencing parameters, the fault log, fault responses, GPIOs and
other functionality. The DC2086A dongle may be plugged
when VIN is present.
6.Once the proper output voltages are established, adjust the loads within the operating range and observe
the output voltage regulation, ripple voltage and other
parameters.
7.Connect the dongle and control the output volt-ages
from the GUI. See “LTpowerPlay GUI for the LTM4676
Quick Start Guide” for details.
2
dc2269aaf
DEMO MANUAL DC2269A-A
Quick Start Procedure
–
VIN 4.5V to 26.5V
++
+
–
Load0 (0~13A)
–
–
+
+
–
VOUT0
Load1 (0~13A)
–
–
+
+
VOUT1
DC2269A-A F02
Figure 2. Proper Measurement Equipment Setup
+
VOUT
–
COUT
GND
Figure 3. Measuring Output Voltage Ripple
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3
DEMO MANUAL DC2269A-A
Quick Start Procedure
Input Power Supply USB Cable VIN USB to I2C/PMBus Dongle DC1613A+DC2086A 4-­‐PIN (J1) Connector Vout0 LTM4676 Demo Board DC2269A-­‐A Load0 Load1 Vout1 100
95
95
90
90
85
85
80
75
70
65
VIN = 5V
fSW = 500kHz
CCM
VOUT = 1V
VOUT = 1.2V
VOUT = 1.5V
VOUT = 1.8V
VOUT = 2.5V
VOUT = 3.3V
0 1 2 3 4 5 6 7 8 9 10 11 12 13
LOAD CURRENT (A)
DC2269A-A F05
Figure 5. Efficiency vs Load Current at VIN = 5V
4
EFFICIENCY (%)
EFFICIENCY (%)
Figure 4. Demo Setup with PC
80
75
70
65
60
VIN = 12V
fSW = 500kHz
CCM
VOUT = 1V
VOUT = 1.2V
VOUT = 1.5V
VOUT = 1.8V
VOUT = 2.5V
VOUT = 3.3V
VOUT = 5V
0 1 2 3 4 5 6 7 8 9 10 11 12 13
LOAD CURRENT (A)
DC2269A-A F06
Figure 6. Efficiency vs Load Current at VIN = 12V
dc2269aaf
DEMO MANUAL DC2269A-A
Quick Start Procedure
VOUT0
20MHz BW
50mV/DIV
VOUT1
20MHz BW
50mV/DIV
6.5A to 9.75A
LOAD STEP
6.5A to 9.75A
LOAD STEP
100µs/DIV
DC2269A-A F07
100µs/DIV
Figure 7. Output Voltage VOUT0
vs Load Current (VOUT0 RANGE = 1)
VOUT0
20MHz BW
10mV/DIV
DC2269A-A F08
Figure 8. Output Voltage VOUT1
vs Load Current (VOUT1 RANGE = 1)
VOUT0
20MHz BW
10mV/DIV
2µs/DIV
DC2269A-A F09
Figure 9. Output Voltage Ripple at
VIN = 12V, VOUT0 = 1V, IOUT0 = 13A
2µs/DIV
DC2269A-A F10
Figure 10. Output Voltage Ripple at
VIN = 12V, VOUT0 = 1.8V, IOUT0 = 13A
Figure 11. Thermal Performance at VIN = 12V, VOUT0 = 1V/11A, VOUT1 = 1.8V/11A,
fSW = 500kHz, TA = 23°C, 200LFM Airflow
dc2269aaf
5
DEMO MANUAL DC2269A-A
LTpowerPlay Software GUI
LTpowerPlay is a powerful Windows based development
environment that supports Linear Technology power system management ICs, including the LTM4675, LTM4676,
LTC3880, LTC3882, LTC3883, LTC2974 and LTC2978.
The software supports a variety of different tasks. You
can use LTpowerPlay to evaluate Linear Technology ICs
by connecting to a demo board system. LTpowerPlay can
also be used in an offline mode (with no hardware present) in order to build a multichip configuration file that
can be saved and reloaded at a later time. LTpowerPlay
provides unprecedented diagnostic and debug features. It
becomes a valuable diagnostic tool during board bring-up
to program or tweak the power management scheme in
a system, or to diagnose power issues when bringing up
rails. LTpowerPlay utilizes the DC1613A and DC2086A USBto-SMBus controller to communicate with one of many
potential targets, including the LTM4676, the LTC3880,
LTC3882 and the LTC3883’s demo system, or a customer
board. The software also provides an automatic update
feature to keep the software current with the latest set
of device drivers and documentation. The LTpowerPlay
software can be downloaded from:
http://linear.com/ltpowerplay
To access technical support documents for LTC Digital
Power Products visit Help. View online help on the LTpowerPlay menu.
Figure 12. LTpowerPlay Main Interface
6
dc2269aaf
DEMO MANUAL DC2269A-A
LTpowerPlay Quick Start Procedure
The following procedure describes how to use LTpowerPlay
to monitor and change the settings of LTM4676.
1.Download and install the LTPowerPlay GUI:
d.If you want to change the output voltage to a different
value, like 1.5V. In the Config tab, type in 1.5 in the
VOUT_COMMAND box, like this:
http://linear.com/ltpowerplay
2.Launch the LTpowerPlay GUI.
a. The GUI should automatically identify the DC2269A-A.
The system tree on the left hand side should look
like this:
b.A green message box shows for a few seconds in
the lower left hand corner, confirming that LTM4676
is communicating:
Then, click the “W” (PC to RAM) icon to write these register
values to the LTM4676. After finishing this step, you will
see the output voltage will change to 1.5V.
If the write is successful, you will see the following message:
c. In the Toolbar, click the “R” (RAM to PC) icon to
read the RAM from the TM4676. This reads the
configuration from the RAM of LTM4676 and loads
it into the GUI.
e. You can save the changes into the NVM. In the tool
bar, click “RAM to NVM” button, as following:
f. Save the demo board configuration to a (*.proj) file.
Click the Save icon and save the file. Name it whatever
you want.
dc2269aaf
7
DEMO MANUAL DC2269A-A
Parts List
ITEM
QTY
REFERENCE
PART DESCRIPTION
MANUFACTURER/PART NUMBER
Required Circuit Components
1
6
CIN1, CIN2, CIN3, CIN4, CIN5, CIN6
CAP, 1210 10µF 10% 25V X5R
MURATA GRM32DR61E106KA12L
2
2
CO1, CO6
CAP, 7343 330µF 20% 6.3V POSCAP
PANASONIC 6TPF330M9L
3
5
CO2, CO3, CO4, CO5, CO7
CAP, 1210 100µF 10% 6.3V X5R
AVX 12106D107KAT2A
4
2
C1, C5
CAP, 0603 2200pF 10% 50V X7R
AVX 06035C222KAT2A
5
2
C9, C10
CAP, 0805 47µF 20% 6.3V X5R
MURATA GRM21BR60J476ME15L
6
2
C12, C13
CAP, 0603 10µF 20% 25V X5R
MURATA GRM188R61E106MA73J
7
1
D1
DIODE, SCHOTTKY BARRIER RECTIFIER
DIODES INC. B0530WS-7-F
8
1
J2
HEADER, 4PIN 2mm STR DL
HIROSE DF3A-4P-2DSA
9
1
L1
IND, 1.0µH
COILCRAFT XAL5030-102MEC
10
3
R1, R22, R39
RES, 0603 100Ω 5% 0.1W
VISHAY CRCW0603100RJNEA
11
2
R6, R33
RES, 0603 0Ω
VISHAY CRCW06030000Z0EA
12
1
R7
RES, 0603 4.99kΩ 1% 0.1W
VISHAY CRCW06034K99FKEA
13
10
R10, R11, R12, R13, R14, R15, R16,
R17, R18, R21
RES, 0603 10kΩ 5% 0.1W
VISHAY CRCW060310K0JNEA
14
1
R20
RES, 0603 4.22kΩ 1% 1/10W
VISHAY CRCW06034K22FKEA
15
1
R29
RES, 0603 6.34kΩ 1% 0.1W
VISHAY CRCW06036K34FKEA
16
3
R36, R37, R38
RES, 0603 10Ω 5% 0.1W
VISHAY CRCW060310R0JNEA
17
1
U1
IC, VOLTAGE REGULATOR LGA
LINEAR TECH. LTM4676EY#PBF
Additional Demo Board Circuit Components
1
0
C2, C3, C4, C6, C7, C8, C11
CAP, 0603 OPTION
OPTION
2
0
R2, R19, R31, R32
RES, 0805 OPTION
OPTION
3
0
R3, R4, R5, R8, R9, R23, R24, R25,
R27, R28
RES, 0603 OPTION
OPTION
4
0
R35
RES, 1206 OPTION
OPTION
0
R40
RES, 1210 OPTION
OPTION
CONN., CARD EDGE
SAMTEC MEC2-20-01-L-DV--TR
Hardware: For Demo Board Only
1
8
1
J1
dc2269aaf
Information furnished by Linear Technology Corporation is believed to be accurate and reliable.
However, no responsibility is assumed for its use. Linear Technology Corporation makes no representation that the interconnection of its circuits as described herein will not infringe on existing patent rights.
VOUT1
VOUT0
VOS1+R
VOS0-R
VIN1
1
3
5
7
9
11
13
15
17
19
21
23
25
27
29
31
33
35
37
39
VOSNS0-
VOS0-R
VOS0+R
VOS0+R
VOUT0
SVIN
CIN3
10uF
25V
1210
C7 OPT
R22 100
C6 OPT
VIN
VIN
GND
GND
GND
GND
GND
N/A
GND
VOS1+
VOS1VOS2+
VOUT1
VOUT1
VOUT1
VOUT1
VOUT2
VOUT2
VOUT2
VOUT2
J1
VIN
VIN
GND
GND
GND
GND
GND
N/A
GND
GND
RUN1
RUN2
VOUT1
VOUT1
VOUT1
VOUT1
VOUT2
VOUT2
VOUT2
VOUT2
R38 10
2
4
6
8
10
12
14
16
18
20
22
24
26
28
30
32
34
36
38
40
E9
D9
E10
D10
G6
H6
R28 OPT
R29 6.34k 1%
R33 0
VOUT1
VOUT0
RUN1
RUN0
H5
R27 OPT
VIN1
H4
G5
R25 OPT
G4
P6
P4
D8
E8
C5
D5
F1
F2
E1
E2
A5
B10
F11
F12
A11
A12
B11
B12
C11
C12
D11
D12
E12
CIN6
10uF
25V
1210
R24 OPT
C8
OPT
R23 OPT
OPT
0805
P3
CIN5
10uF
25V
1210
0
R6
R19
CIN4
10uF
25V
1210
VOSNS0-
C5 2200pF
VIN2
R37 10
4.22k 1%
R20
CIN2
10uF
25V
1210
COMP0A
CIN1
10uF
25V
1210
L1 1uH
1206
R35 OPT
C12
10uF
25V
SVIN
SVIN
VIN0
VIN0
VIN0
VIN0
VIN0
VIN0
VIN0
VIN0
VIN0
VTRIM1CFG
VOUT1CFG
VTRIM0CFG
VOUT0CFG
FSWPHCFG
ASEL
VOSNS0-
VOSNS0+
VORB0-
VORB0+
COMP0B
COMP0A
TSNS0B
TSNS0A
ISNS0B+
ISNS0A+
ISNS0BISNS0A-
SNUB0
SW0
C13
10uF
25V
H12
J11
J12
K11
K12
L11
L12
M11
M12
VIN1
VIN1
VIN1
VIN1
VIN1
VIN1
VIN1
VIN1
VIN1
P1
L10
R2
OPT
0805
R7
4.99k
1%
C1 2200pF
P2
OPT
C2
LTM4676EY
U1
R3
OPT
COMP1A
VOUT1
C9
47uF
6.3V
0805
R31
OPT
0805
VOUT0
R32
OPT
0805
VOUT1
330uF
6.3V
7343
+ CO1
SY NC
VDD33
INTVCC
INTVCC
SCL
SDA
GPIO0B
GPIO1B
E6
D6
E4
F4
THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.
SCALE = NONE
R11
10K
SVIN
R12
10K
C3
OPT
SDA
SCL
DATE:
N/A
SIZE
VOUT0
R40
OPT
1210
VOUT1
R13
10K
TECHNOLOGY
R14
10K
R8
R16
10K
VOSNS0-
330uF
6.3V
+ CO6
IC NO.
Monday, October 13, 2014
DEMO CIRCUIT 2269A
LTM4676EY
SHEET
1
OF
1
2
REV.
HIGH EFFICIENCY, DC/DC STEP-DOWN,µ MODULE
REGULATOR WITH POWER SYSTEM MANAGEMENT
LTC CONFIDENTIA L - FOR CUSTOM ER USE ONLY
1630 McCarthy Blvd.
Milpitas, CA 95035 www.linear.com
Phone: (408)432-1900
Fax: (408)434-0507
C11 OPT
R18
10K
COMP1A
RUN1
GPIO1B
VOUT0
R17
10K
CO5
100uF
6.3V
1210
OPT
R5
OPT
R4
OPT
R39 100
CO4
100uF
6.3V
1210
R15
10K
COMP0A
RUN0
GPIO0B
OPTIONAL JUMPER FOR DUAL PHASE
SINGLE OUTPUT CONFIGURATION
D1
B0520WS-7-F
VDD33
VOS1+R
R1
100
TITLE: SCHEMATIC
4
3
2
1
C10
47uF
6.3V
0805
10K
R21
AUX3V4
SCL
GND
SDA
APPROVALS
C10
E11
H11
K10
A1
A2
A3
B1
B2
B3
C1
C2
C3
D1
D2
D3
P5
RUN1
F6
J6
RUN0
F5
J2
ALERTB
E5
K6
SHARE_CLK
H7
LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A
CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS;
PCB DES.
HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO
VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL
APP ENG.
APPLICATION. COMPONENT SUBSTITUTION AND PRINTED
CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT
PERFORMANCE OR RELIABILITY. CONTACT LINEAR
TECHNOLOGY
APPLICATIONS ENGINEERING
FOR DC2269A\1013\2269A-2.DSN
ASSISTANCE.
C:\PROJECTS\LTM4676\DEMO
BOARD
DNC
DNC
DNC
DNC
VOUT0
VOUT0
VOUT0
VOUT0
VOUT0
VOUT0
VOUT0
VOUT0
VOUT0
VOUT0
VOUT0
VOUT0
VDD25
RUN1
RUN0
WP
GPIO1
GPIO0
SDA
SCL
ALERT
R10
10K
SYBC
E7
OPT
R9
R36
10
CO7
100uF
6.3V
1210
VDD33
C4
OPT
CO3
100uF
6.3V
1210
J7
G9
F9
CO2
100uF
6.3V
1210
SHARE_CLK
CUSTOMER NOTICE
A4
A6
A7
A8
A9
A10
B4
B5
B6
B7
B8
B9
C4
C6
C7
C8
C9
D4
D7
E3
F3
F10
G3
G10
G11
G12
H3
H10
J4
J10
K4
K7
K8
K9
L4
L5
L6
L7
L8
L9
M4
M6
M7
M8
M9
M10
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
SW1
M5
SNUB1
G2
G1
ISNS1AISNS1B-
H2
H1
ISNS1A+
ISNS1B+
K5
J5
TSND1B
TSNS1A
H8
COMP1A
J8
COMP1B
J9
VCRB1
J1
J2
J3
K1
K2
K3
L1
L2
L3
M1
M2
M3
VOUT1
VOUT1
VOUT1
VOUT1
VOUT1
VOUT1
VOUT1
VOUT1
VOUT1
VOUT1
VOUT1
VOUT1
H9
VOSNS1
SGND
SGND
SGND
SGND
G7
G8
F7
F8
VIN1
DEMO MANUAL DC2269A-A
Schematic Diagram
dc2269aaf
9
DEMO MANUAL DC2269A-A
DEMONSTRATION BOARD IMPORTANT NOTICE
Linear Technology Corporation (LTC) provides the enclosed product(s) under the following AS IS conditions:
This demonstration board (DEMO BOARD) kit being sold or provided by Linear Technology is intended for use for ENGINEERING DEVELOPMENT
OR EVALUATION PURPOSES ONLY and is not provided by LTC for commercial use. As such, the DEMO BOARD herein may not be complete
in terms of required design-, marketing-, and/or manufacturing-related protective considerations, including but not limited to product safety
measures typically found in finished commercial goods. As a prototype, this product does not fall within the scope of the European Union
directive on electromagnetic compatibility and therefore may or may not meet the technical requirements of the directive, or other regulations.
If this evaluation kit does not meet the specifications recited in the DEMO BOARD manual the kit may be returned within 30 days from the date
of delivery for a full refund. THE FOREGOING WARRANTY IS THE EXCLUSIVE WARRANTY MADE BY THE SELLER TO BUYER AND IS IN LIEU
OF ALL OTHER WARRANTIES, EXPRESSED, IMPLIED, OR STATUTORY, INCLUDING ANY WARRANTY OF MERCHANTABILITY OR FITNESS
FOR ANY PARTICULAR PURPOSE. EXCEPT TO THE EXTENT OF THIS INDEMNITY, NEITHER PARTY SHALL BE LIABLE TO THE OTHER FOR
ANY INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES.
The user assumes all responsibility and liability for proper and safe handling of the goods. Further, the user releases LTC from all claims
arising from the handling or use of the goods. Due to the open construction of the product, it is the user’s responsibility to take any and all
appropriate precautions with regard to electrostatic discharge. Also be aware that the products herein may not be regulatory compliant or
agency certified (FCC, UL, CE, etc.).
No License is granted under any patent right or other intellectual property whatsoever. LTC assumes no liability for applications assistance,
customer product design, software performance, or infringement of patents or any other intellectual property rights of any kind.
LTC currently services a variety of customers for products around the world, and therefore this transaction is not exclusive.
Please read the DEMO BOARD manual prior to handling the product. Persons handling this product must have electronics training and
observe good laboratory practice standards. Common sense is encouraged.
This notice contains important safety information about temperatures and voltages. For further safety concerns, please contact a LTC application
engineer.
Mailing Address:
Linear Technology
1630 McCarthy Blvd.
Milpitas, CA 95035
Copyright © 2004, Linear Technology Corporation
10 Linear Technology Corporation
dc2269aaf
LT 0515 • PRINTED IN USA
1630 McCarthy Blvd., Milpitas, CA 95035-7417
(408) 432-1900
●
FAX: (408) 434-0507 ● www.linear.com
 LINEAR TECHNOLOGY CORPORATION 2015
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