Analog Devices LINEAR DC2702A-A Quick setup guide

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

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

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

DEMO MANUAL DC2702A-A

Rev 0

100

0 5 10 15 20 25 30 35 40 45 50

EFFICIENCY (%)

OUTPUT LOAD CURRENT (A)

VIN = 12V

VIN = 6V

DC2702A-A F05

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

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

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

DEMO MANUAL DC2702A-A

Rev 0

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.

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.

DEMO MANUAL DC2702A-A

Rev 0

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"

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

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