Analog Devices LINEAR DC2702A-A Quick setup guide

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DEMO MANUAL DC2702A-A
Rev 0
DESCRIPTION
LTM4700EY
Dual 50A or Single 100A µModule Regulator
With Digital Power System Management
Demonstration circuit 2702A-A is a dual-output, high
efficiency, high density, µModule regulator with 4.5V to
16V input range. Each output can supply 50A maximum
load current. The demo board has a LTM4700 µModule
regulator, which is a dual 50A or single 100A step-down
regulator with digital power system management. Please
see LTM4700 data sheet for more detailed information.
DC2702A-A powers up to default settings and produce
power based on configuration resistors without the need
for any serial bus communication. This allows easy evalu-
ation of the DC/DC converter. To fully explore the extensive
power system management features of the part, down-
load the GUI software LTpowerPlay™onto your PC and use
All registered trademarks and trademarks are the property of their respective owners.
BOARD PHOTO
LT C ’s I2C/SMBus/PMBus dongle 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.
GUI Download
The software can be downloaded from: LTpowerPlay
For more details and instructions of LTpowerPlay, please
refer to LTpowerPlay GUI for LTM4700 Quick Start Guide.
Design files for this circuit board are available.
Figure1. Dual-Output LTM4700/DC2702A-A Demo Circuit

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DEMO MANUAL DC2702A-A
Rev 0
QUICK START PROCEDURE
Demonstration circuit 2702A-A is easy to set up to evalu-
ate the performance of the LTM4700EY. 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-16V) and GND (input return).
2. Connect the 1.0V output load between VOUT0 and GND
(Initial load: no load).
3. Connect the 1.5V output load between VOUT1 and GND
(Initial load: no load).
4. Connect the DVMs to the input and outputs. Set default
jumper position: JP1: ON; JP2: ON; JP3: ON.
5. Turn on the input power supply and check for the
proper output voltages. VOUT0 should be 1.0V ±0.5%,
and VOUT1 should be 1.5V ±0.5%.
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 voltages
from the GUI. See “LTpowerPlay GUI for the LTM4700
Quick Start Guide” for details.
Note: Internal bias circuit is enabled when VIN >7V and
JP3 is ON.
Note:When measuring the output or input voltage rip-
ple, 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.
PERFORMANCE SUMMARY
Specifications are at TA= 25°C
PARAMETER CONDITIONS VALUE
Input Voltage Range 4.5V to 16V
Output Voltage, VOUT0 VIN = 4.5V to 16V, IOUT0 = 0A to 50A 0.5V to 1.8V, Default: 1.0V
Maximum Output Current, IOUT0 VIN = 4.5V to 16V, VOUT0 = 0.5V to 1.8V 50A
Output Voltage, VOUT1 VIN = 4.5V to 16V, IOUT1 = 0A to 50A 0.5V to 1.8V, Default: 1.5V
Maximum Output Current, IOUT1 VIN = 4.5V to 16V, VOUT1 = 0.5V to 1.8V 50A
Typical Efficiency VIN = 12V, VOUT0 = 1.0V, IOUT0 = 50A
VIN = 12V, VOUT1 = 1.5V, IOUT1 = 50A
88.7% (See Figure5)
91.3% (See Figure6)
Default Switching Frequency 500kHz
MAXIMUM OUTPUT CURRENT NUMBER OF OUPUTS
NUMBER OF LTM4700 µMODULE
REGULATORS ON THE BOARD DEMO BOARD NUMBER
50A 2 1 DC2702A-A
100A 1 1 DC2702A-B
200A 1 2 DC2784A-A
300A 1 3 DC2784A-B
400A 1 4 DC2784A-C

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DEMO MANUAL DC2702A-A
Rev 0
QUICK START PROCEDURE
–
+IOUT0
IIN
VIN
4.5V to 16V
DC2702A F02
VOUT0
LOAD0
0A-50A
+
–IOUT1
VOUT1
LOAD1
0A-50A
–
+
–+
+–
–+
–+
+ –
VOUT GND
COUT
Figure2. Proper Measurement Equipment Setup
Figure3. Measuring Output Voltage Ripple

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DEMO MANUAL DC2702A-A
Rev 0
70
75
80
85
90
95
100
0 5 10 15 20 25 30 35 40 45 50
EFFICIENCY (%)
OUTPUT LOAD CURRENT (A)
VIN = 12V
VIN = 6V
DC2702A-A F05
70
75
80
85
90
95
100
0 5 10 15 20 25 30 35 40 45 50
EFFICIENCY (%)
OUTPUT LOAD CURRENT (A)
VIN = 12V
VIN = 6V
DC2702A-A F05
Figure5. Efficiency vs Load Current on CH0
(CH1 is Disabled, RUNP is ON)
Figure6. Efficiency vs Load Current on
CH1 (CH0 is Disabled, RUNP is ON)
QUICK START PROCEDURE
INPUT POWER
SUPPLY
USB TO I2C/PMBus
DONGLE DC1613A
LTM4700 DEMO BOARD
DC2702A-A
LOAD0
USB CABLE
12-PIN (J1)
CONNECTOR DC2702A-A F04
VIN
VOUT0
VOUT1
LOAD1
Connecting a PC to DC2702A
You can use a PC to reconfigure the power management
features of the LTM4700 such as:nominal V
OUT
, mar-
gin set points, OV/UV limits, temperature fault limits,
sequencing parameters, the fault log, fault responses,
GPIOs and other functionalities. The DC1613A dongle
may be plugged when VIN is present.
Figure4. Demo Setup with PC
Efficiency vs Load Current at VO= 1.0V, fSW = 500kHz Efficiency vs Load Current at VO= 1.5V, fSW = 500kHz

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DEMO MANUAL DC2702A-A
Rev 0
QUICK START PROCEDURE
DC2702A-A F07
VOUT0 (20MHz BW) [50mV/DIV]
0A to 12.5A LOAD STEP
DC2702A-A F08
VOUT1 (20MHz BW) [50mV/DIV]
0A to 12.5A LOAD STEP
DC2702A-A F09
VOUT0 (20MHz BW) [5mV/DIV] VOUT1 (20MHz BW) [5mV/DIV]
DC2702A-A F10
Figure7. Output Voltage VOUT0 vs Load Current (VOUT0 = 1.0V) Figure8. Output voltage VOUT1 vs Load Current (VOUT1 = 1.5V)
Figure9. Output Voltage Ripple at VIN = 12V,
VOUT0 = 1.0V, IOUT0 = 50A
Figure10. Output Voltage Ripple at VIN = 12V,
VOUT1 = 1.5V, IOUT1 = 50A

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DEMO MANUAL DC2702A-A
Rev 0
QUICK START PROCEDURE
Figure11. Thermal at VIN = 12V, VOUT0 = 1.0V, IOUT0 = 50A, VOUT1 = 1.5V, IOUT1 = 50A, TA= 25°C, No Airflow
Figure12. Thermal at VIN = 12V, VOUT0 = 1.0V, IOUT0 = 50A, VOUT1 = 1.5V, IOUT1 = 50A, TA= 25°C, 200LFM Airflow

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DEMO MANUAL DC2702A-A
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LTpowerPlay is a powerful Windows based development
environment that supports Linear Technology power
system management ICs and μModules, including the
LTM4675, LTM4676, LTM4677, LTM4678, LTC3880,
LTC3882 and LTC3883. 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
LTPOWERPLAY SOFTWARE GUI
Figure13. LTpowerPlay Main Interface
DC1613A USB-to-SMBus controller to communicate with
one of many potential targets, including the LTM4675,
LTM4676, LTM4677, LTM4678, LTC3880, LTC3882,
LTC3883’s demo system, or a customer board. The soft-
ware 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: LTpowerPlay
To access technical support documents for LTC Digital
Power Products visit the LTpowerPlay Help menu. Online
help also available through the LTpowerPlay.

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DEMO MANUAL DC2702A-A
Rev 0
LTPOWERPLAY QUICK START PROCEDURE
The following procedure describes how to use LTpowerPlay
to monitor and change the settings of LTM4700.
1. Download and install the LTpowerPlay GUI.
2. Launch the LTpowerPlay GUI.
a. TheGUIshouldautomaticallyidentifytheDC2702A.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 LTM4700 is
communicating:
c. In the tool bar, click the “R” (RAM to PC) icon to read the
RAM from the LTM4700. This reads the configuration
from the RAM of LTM4700 and loads it into the GUI.
d. If you want to change the output voltage to a different
value, like 0.8V. In the Config tab, type in 0.8 in the
VOUT_COMMAND box, like this:
Then, click the “W” (PC to RAM) icon to write these reg-
ister values to the LTM4700. After finishing this step, you
will see the output voltage will change to 0.8V.
Ifthewriteissuccessful,you willseethefollowing message:
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.

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DEMO MANUAL DC2702A-A
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PARTS LIST
ITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER
Required Circuit Components
1 16 COUT1, COUT2, COUT3, COUT6,
COUT7, COUT8, COUT14, COUT15,
COUT16, COUT18, COUT19, COUT20,
COUT21, COUT22, COUT9, COUT10
CAP., 330µF, X6S, 4V, 20%, 1210 TAIYO YUDEN, AMK325AC6337MM-P
2 1 CIN1 CAP., 180µF, ALUM. POLY., 25V, 20%, 8 ×12mm SMD,
E12
PANASONIC, 25SVPF180M
3 2 C2, C15 CAP., 6800pF, X7R, 50V, 5%, 0603 AVX, 06035C682JAT2A
4 8 CIN2, CIN3, CIN4, CIN5, CIN6, CIN7,
CIN8, CIN9
CAP., 22µF, X5R, 25V, 10%, 1210 AVX, 12103D226KAT2A
MURATA, GRM32ER61E226KE15L
TAIYO YUDEN, TMK325BJ226KM-P
TAIYO YUDEN, TMK325BJ226KM-T
5 3 C21, C22, C24 CAP., 1µF, X5R, 25V, 10%, 0603 AVX, 06033D105KAT2A
NIC, NMC0603X5R105K25TRPF
6 1 C23 CAP., 1µF, X7R, 25V, 10%, 0805 AVX, 08053C105KAT2A
71 C26 CAP., 0.1µF, X5R, 16V, 10%, 0603 AVX, 0603YD104KAT2A
NIC, NMC0603X5R104K16TRPF
8 2 C27, C28 CAP., 0.01µF, X7R, 25V, 5%, 0603 AVX, 06033C103JAT2A
9 1 C33 CAP., 22µF, X5R, 6.3V, 20%, 0603 MURATA, GRM188R60J226MEA0D
10 26 E1, E2, E3, E4, E5, E6, E8, E9, E10,
E11, E12, E13, E14, E15, E16, E17,
E18, E19, E20, E21,E22, E23, E24,
E25, E26
TEST POINT, TURRET, 0.064", MTG. HOLE MILL-MAX, 2308-2-00-80-00-00-07-0
11 1 J1 CONN., SHROUDED HDR, MALE, 2 ×6, 2mm, VERT,
STR, THT
FCI, 98414-G06-12ULF
12 3 JP1, JP2 CONN., HDR,MALE, 1 ×3, 2mm, VERT, STR, THT WURTH ELEKTRONIK, 62000311121
13 3 J2, J3, J4 CONN., RF, BNC, RCPT JACK, 5-PIN, STR, THT, 50Ω AMPHENOL RF, 112404
14 6 J5, J6, J7, J8, J9, J10 RING, LUG, CRIMP, #10, NON-INSULATED,
SOLDERLESS TERMINALS
KEYSTONE, 8205
15 12 J5, J6, J7, J8, J9, J10 NUT, HEX, STEEL, ZINC PLATE, 10-32 KEYSTONE, 4705
16 6 J5, J6, J7, J8, J9, J10 STUD, FASTENER, #10-32 PENNENGINEERING, KFH-032-10ET
17 6 J5, J6, J7, J8, J9, J10 WASHER, FLAT, STEEL, ZINC PLATE, OD: 0.436 [11.1] KEYSTONE, 4703
18 1 J12 CONN., HDR, FEMALE, 2 ×7, 2mm, R/A THT SULLINS CONNECTOR SOLUTIONS,
NPPN072FJFN-RC
19 1 J11 CONN., HDR, MALE, 2 ×7, 2mm, R/A THT MOLEX, 0877601416
MOLEX, 87760-1416
20 4 MH1, MH2, MH3, MH4 STANDOFF, NYLON, SNAP-ON, 0.50" WURTH ELEKTRONIK, 702935000
21 2 Q1, Q2 XSTR., MOSFET, N-CH, 40V, TO-252 (DPAK) VISHAY, SUD50N04-8M8P-4GE3
22 1 Q3 XSTR., MOSFET, P-CH, 20V, 5.9A, TO-236 (SOT23-3) VISHAY, SI2365EDS-T1-GE3
23 6 R3,R25,R32,R69,R70,R93 RES.,10 OHMS,1%,1/10W,0603 "NIC, NRC06F10R0TRF
PANASONIC, ERJ3EKF10R0V
ROHM, MCR03EZPFX10R0
VISHAY, CRCW060310R0FKEA
YAGEO, RC0603FR-0710RL"
24 8 R9,R29,R33,R63,R65,R66,R91,R92 RES.,0 OHM,1/10W,0603,AEC-Q200 "NIC, NRC06ZOTRF
VISHAY, CRCW06030000Z0EA"

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DEMO MANUAL DC2702A-A
Rev 0
ITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER
25 15 R10, R11, R12, R13, R14, R15, R16,
R18, R19, R24, R52, R77, R94, R95,
R106
RES., 10kΩ, 5%, 1/10W, 0603, AEC-Q200 PANASONIC, ERJ3GEYJ103V
VISHAY, CRCW060310K0JNEA
26 1 R30 RES., 2.43kΩ, 1%, 1/10W, 0603, AEC-Q200 NIC, NRC06F2431TRF
PANASONIC, ERJ3EKF2431V
VISHAY, CRCW06032K43FKEA
27 1 R31 RES., 4.22kΩ, 1%, 1/10W, 0603, AEC-Q200 NIC, NRC06F4221TRF
PANASONIC, ERJ3EKF4221V
VISHAY, CRCW06034K22FKEA
28 1 R48 RES., 0Ω, 3/4W, 2010, AEC-Q200 NIC, NRC50ZOTRF
PANASONIC, ERJ12ZY0R00U
VISHAY, CRCW20100000Z0EF
29 2 R50, R51 RES., 30Ω, 1%, 1W, 2512, AEC-Q200 VISHAY, CRCW251230R0FKEG
30 1 R53 RES., 0.01Ω, 1%, 1/2W, 2010, SENSE, AEC-Q200 VISHAY, WSL2010R0100FEA
31 2 R72, R73 RES., 4.99kΩ, 1%, 1/10W, 0603, AEC-Q200 NIC, NRC06F4991TRF
PANASONIC, ERJ3EKF4991V
VISHAY, CRCW06034K99FKEA
32 1 R78 RES., 15.8kΩ, 1%, 1/10W, 0603, AEC-Q200 NIC, NRC06F1582TRF
PANASONIC, ERJ3EKF1582V
VISHAY, CRCW060315K8FKEA
33 1 R90 RES 0.001Ω, 1%, 1W, 2010 VISHAY, WSL20101L000FEA18
34 1 U1 IC, DUAL 50A POP PSM MODULE,
BGA 15 ×22 ×7.82mm
ANALOG DEVICES, LTM4700EY#PBF
35 1 U2 IC, MEMORY, EEPROM, 2Kb (256x8), TSSOP-8,
400kHz
MICROCHIP, 24LC025-I/ST
MICROCHIP, 24LC025T-I/ST
36 3 XJP1, XJP2 CONN., SHUNT, FEMALE, 2 POS, 2mm WURTH ELEKTRONIK, 60800213421
37 1 LABEL SPEC, DEMO BOARD SERIAL NUMBER BRADY, THT-96-717-10
38 0 PCA ASSY DWG, DC2702A
39 1 TOOL, STENCIL, 700-DC2702A ANALOG DEVICES, 830-DC2702A
40 0 RES., OPTION, 1206
41 0 CAP., OPTION, 0603
42 1 PCB, DC2702A PHASE 3 TECHNOLOGIES INC.,
600-DC2702A
43 0 RES., OPTION, 0805
44 0 CAP., OPTION, D-CASE
45 0 RES., OPTION, 0603
46 0 RES., OPTION, 2010
47 0 DIODE, OPTION, SOD-323
PARTS LIST