Linear Technology DC2269A-A Quick setup guide

dc2269aaf

DEMO MANUAL DC2269A-A

Description

LTM4676EY

Dual Step-Down µModule Regulator

with PMBus Power System Management

Demonstration circuit 2269A-A is a dual-output, high ef-

ficiency,highdensity,µModule

supplyonasmall1.5"×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 LT M

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.

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 evalu-

ation 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

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.

performance summary

LT C ’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, cur-

rent, temperature and fault status.

GUI Download

The software can be downloaded from:

http://www.linear.com/ltpowerplay

For more details and instructions of LTpowerPlay, please

refer to LTpowerPlay GUI for LTM4676 Quick Start Guide.

Design files for this circuit board are available at

http://www.linear.com/demo/DC2269A-A

Specifications are at TA= 25°C

Figure 1. Dual-Output LTM4676/DC2269A-A Demo Circuit

PARAMETER CONDITIONS VALUE

Input Voltage Range 4.5V to 26.5V

Output Voltage, VOUT0 VIN = 4.5V to 26.5V, IOUT0 = 0A to 13A 0.5V to 4V, Default: 1V

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 13A

Typical Efficiency VIN = 12V, VOUT = 1.8V, IOUT = 13A 86.3%

Default Switching Frequency 500kHz

dc2269aaf

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 measure-

ment 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%.

6. Once the proper output voltages are established, ad-

just 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.

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

setpoints, OV/UV limits, temperature fault limits, sequenc-

ing parameters, the fault log, fault responses, GPIOs and

other functionality. The DC2086A dongle may be plugged

when VIN is present.

dc2269aaf

DEMO MANUAL DC2269A-A

Quick start proceDure

Figure 2. Proper Measurement Equipment Setup

+ +

– –

+–

–

VIN 4.5V to 26.5V

Load0 (0~13A)

–

Load1 (0~13A)

+–

VOUT0

–+

VOUT1

DC2269A-A F02

Figure 3. Measuring Output Voltage Ripple

+ –

VOUT GND

COUT

dc2269aaf

DEMO MANUAL DC2269A-A

USBtoI2C/PMBusDongle

DC1613A+DC2086A

LTM4676Demo

BoardDC2269AA

InputPower

Supply

USBCable VIN

4PIN(J1)

Connector

Load0

Vout0

Vout1

Load1

Quick start proceDure

Figure 4. Demo Setup with PC

LOAD CURRENT (A)

EFFICIENCY (%)

DC2269A-A F05

65 2 4 6 8 10 121 3 5 7 9 11 13

100

VOUT = 1V

VOUT = 1.2V

VOUT = 1.5V

VOUT = 1.8V

VOUT = 2.5V

VOUT = 3.3V

VIN = 5V

fSW = 500kHz

CCM

LOAD CURRENT (A)

EFFICIENCY (%)

DC2269A-A F06

60 2 4 6 8 10 121 3 5 7 9 11 13

VOUT = 1V

VOUT = 1.2V

VOUT = 1.5V

VOUT = 1.8V

VOUT = 2.5V

VOUT = 3.3V

VOUT = 5V

VIN = 12V

fSW = 500kHz

CCM

Figure 5. Efficiency vs Load Current at VIN = 5V Figure 6. Efficiency vs Load Current at VIN = 12V

dc2269aaf

DEMO MANUAL DC2269A-A

Quick start proceDure

100µs/DIV DC2269A-A F07

VOUT0

20MHz BW

50mV/DIV

6.5A to 9.75A

LOAD STEP

100µs/DIV DC2269A-A F08

VOUT1

20MHz BW

50mV/DIV

6.5A to 9.75A

LOAD STEP

2µs/DIV DC2269A-A F09

VOUT0

20MHz BW

10mV/DIV

2µs/DIV DC2269A-A F10

VOUT0

20MHz BW

10mV/DIV

Figure 7. Output Voltage VOUT0

vs Load Current (VOUT0 RANGE = 1)

Figure 8. Output Voltage VOUT1

vs Load Current (VOUT1 RANGE = 1)

Figure 9. Output Voltage Ripple at

VIN = 12V, VOUT0 = 1V, IOUT0 = 13A

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

DEMO MANUAL DC2269A-A

LtpowerpLay software Gui

LTpowerPlay is a powerful Windows based development

environment that supports Linear Technology power sys-

tem 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 pres-

ent) 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 theDC1613Aand DC2086AUSB-

to-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 LT C Digital

Power Products visit Help. View online help on the LT-

powerPlay menu.

Figure 12. LTpowerPlay Main Interface

dc2269aaf

DEMO MANUAL DC2269A-A

LtpowerpLay Quick start proceDure

Thefollowingprocedure describes how touseLTpowerPlay

to monitor and change the settings of LTM4676.

1. Download and install the LTPowerPlay GUI:

http://linear.com/ltpowerplay

2. Launch the LTpowerPlay GUI.

a. TheGUIshould automatically identify theDC2269A-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:

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.

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:

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.

Ifthewrite is successful,youwill see thefollowingmessage:

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

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

Hardware: For Demo Board Only

1 1 J1 CONN., CARD EDGE SAMTEC MEC2-20-01-L-DV--TR

dc2269aaf

DEMO MANUAL DC2269A-A

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 representa-

tion that the interconnection of its circuits as described herein will not infringe on existing patent rights.

schematic DiaGram

VOS0+R

VOUT1

CO5

100uF

6.3V

1210

V OUT1

CIN5

10uF

25V

1210

V IN1

OPT

CIN6

10uF

25V

1210

R38 10

VOS0-R

47uF

0805

6.3V

COMP1A

CO2

100uF

6.3V

1210

CO7

100uF

6.3V

1210

V OUT0

R21

10K

L1 1uH

R36

C6 OPT

R20

4.22k 1%

VOS0+R

VOUT1

OPT

R39 100

OPT

C11 OPT

VOSNS0-

VDD33

R40

OPT

1210

CIN3

10uF

25V

1210

OPT

GPIO1BGPIO0B

R11

10K

OPT

R32

OPT

0805

LTM4676EY

VOUT0 A1

VOUT0 A2

VOUT0 A3

GND

SNUB0

VOUT0 B1

VOUT0 B2

VOUT0 B3

GND

VOUT0 C1

VOUT0 C2

VOUT0 C3

GND

TSNS0A

ISNS1A- G2

INTVCC G9

SCL E6

RUN0 F5

ALERT E5

TSNS0B

GND

A10

VIN0

A11

VIN0

A12

GND

SW0

B10

VIN0

B11

VIN0

B12

GND

DNC C10

VIN0

C11

VIN0

C12

GND

G11

SGND

SYNC E7

INTVCC F9

COMP0B

GND

VOUT1 M2

VOUT1 M3

GND

SNUB1 M5

GND

M10

VIN1 M11

VOUT1 L2

VOUT1 L3

GND

SW1 L10

VIN1 L11

VOUT1 K2

VOUT1 K3

GND

DNC K10

VIN1 K11

VOUT1 J2

VOUT1 J3

GND

VCRB1 J9

GND

J10

VIN1 J11

GND

VOUT0 D1

VOUT0 D2

VOUT0 D3

GND

VOSNS0+

VORB0+

D10

VIN0

D11

VIN0

D12

ISNS0B-

ISNS0A-

GND

GPIO0 E4

VORB0-

E10

DNC E11

VIN0

E12

ISNS0B+

ISNS0A+

GND

F10

SVIN

F11

SVIN

F12

ISNS1B- G1

GND

G10

GND

G12

ISNS1B+ H1

ISNS1A+ H2

GND

FSWPHCFG

VTRIM0CFG

VTRIM1CFG

SHARE_CLK H7

VOSNS1 H9

GND

H10

DNC H11

VIN1 H12

VIN1 M12

VOUT1 M1

VIN1 L12

VOUT1 J1

TSNS1A J5

COMP1B J8

VIN1 J12

VOUT1 K1

TSND1B K5

WP K6

GND

VIN1 K12

VOUT1 L1

SDA D6

RUN1 F6

SGND

VOUT1CFG

SGND

GND

ASEL

COMP0A

VOSNS0-

VOUT0CFG

GPIO1 F4

VDD25 J6

COMP1A H8

VDD33 J7

SGND

GND

V OUT0

R12

10K

CO4

100uF

6.3V

1210

R31

OPT

0805

SDA

100

R22 100

C7 OPT

R13

10K

SCL

CIN1

10uF

25V

1210

OPT

R14

10K

VOS1+R

CIN2

10uF

25V

1210

VOS1+R

R19

OPT

0805

V OUT0

OPT

R15

10K

R24 OPT

C10

47uF

0805

6.3V

V OUT1

OPTIONAL JUMPER FOR DUAL PHASE

SINGLE OUTPUT CONFIGURATION

VOUT0

R35 OPT

1206

SV IN

R25 OPT

R16

10K

R27 OPT

+CO6

330uF

6.3V

R17

10K

R28 OPT

RUN1RUN0 R4

OPT

V IN2

CO3

100uF

6.3V

1210

R33 0

R18

10K

COMP1 ACOMP0 A R5

OPT

R23 OPT

SHARE_CLK

RUN1

VOUT0

VDD33

RUN0

OPT

0805

ALER TB

VIN

1VIN 2

VIN

3VIN 4

GND

5GND 6

GND

7GND 8

GND

9GND 10

GND

11 GND 12

GND

13 GND 14

N/A

15 N/A 16

GND

17 GND 18

VOS1+

19 GND 20

VOS1-

21 RUN1 22

VOS2+

23 RUN2 24

VOUT1

25 VOUT1 26

VOUT1

27 VOUT1 28

VOUT1

29 VOUT1 30

VOUT1

31 VOUT1 32

VOUT2

33 VOUT2 34

VOUT2

35 VOUT2 36

VOUT2

37 VOUT2 38

VOUT2

39 VOUT2 40

V IN1

VOUT1

R10

10K

RUN1

SCL

VOUT0

SDA 1

GND 2

SCL 3

AUX3V4 4

VOSNS0-

C5 2200pF

R37 10

4.99k

SDA

V IN1

+CO1

330uF

6.3V

7343

SV IN

VOS0-R

VOSNS0-

GPIO0B

C12

10uF

25V

RUN0

B0520WS-7-F

GPIO1B

R29 6.34k 1%

C1 2200pF

SIZE

DATE:

IC NO. REV .

SHEET OF

TITLE:

APPROVALS

PCB DES.

APP ENG.

TECHNOLOGY Fax: (408)434-0507

Milpitas, CA 95035

Phone: (408)432-1900

1630 McCarthy Blvd.

LTC CON FI DEN TIA L - FOR C USTOM ER USE ON LY

CUSTOMER NOTICE

LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A

CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS;

HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO

VERIFY PROPER AND RELIABLEOPERATION IN THEACTUAL

APPLICATION. COMPONENT SUBSTITUTION AND PRINTED

CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT

PERFORMANCE OR RELIABILITY. CONTACT LINEAR

TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE.

THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND

SCHEMATIC

SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.

SCALE = NONE

www.linear.com

DEMO CIRCUIT 2269A

Monday, October 13, 2014 11

HIGH EFFICIENCY , DC/DC STEP-DOWN, MODULE

N/A LTM4676EY

REGULAT OR WIT H POWER SY STEM MANAGEMENT

C:\PROJECTS\LTM4676\DEMO BOARD DC2269A\1013\2269A-2.DSN

COMP0A

C13

10uF

25V

SYBC

CIN4

10uF

25V

1210

dc2269aaf

DEMO MANUAL DC2269A-A

Linear Technology Corporation

1630 McCarthy Blvd., Milpitas, CA 95035-7417

(408) 432-1900 ●FAX: (408) 434-0507 ●www.linear.com

 LINEAR TECHNOLOGY CORPORATION 2015

LT 0515 • PRINTED IN USA

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

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