Linear Technology DC1392A Quick setup guide

dc1392af

DEMO MANUAL DC1392A

DESCRIPTION

LTM4604A

2.375VIN(MIN), 4A Step-Down

µModule Regulator

Demonstration circuit 1392A features the LTM

4604AEV,

the high efficiency, high density switch mode step-down

μModule

regulator. The input voltagerange is from 2.375V

to 5.5V with a jumper selectable output voltage from 0.8V

to 3.3V. The rated load current is 4A, while derating is

necessary for certain VIN, VOUT and thermal conditions.

By using the TRACK pin, the output can be set to coin-

cidentally or ratiometrically track to another voltage rail.

L, LT, LTC, LTM, μModule, Linear Technology and the Linear logo are registered trademarks of

Linear Technology Corporation. All other trademarks are the property of their respective owners.

BOARD PHOTO

The LTM4604A data sheet must be read in conjunction

with this demo manual prior to working on or modifying

demo circuit DC1392A.

Design files for this circuit board are available at

http://www.linear.com/demo

PERFORMANCE SUMMARY

(TA= 25°C)

PARAMETER CONDITION VALUE

Input Voltage Range 2.375V to 5.5V

Output Voltage, VOUT Jumper Selectable (Open for 0.8V) 1.2V, 1.5V, 1.8V, 2.5V, 3.3V; ±2%

Maximum Continuous Output Current Derating is Necessary for Certain VIN, VOUT and

Thermal Conditions

4A DC

Default Operating Frequency 1.25MHz

Efficiency VIN = 5V, VOUT = 3.3V, IOUT = 4A 88% Typical, See Figure 3

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dc1392af

DEMO MANUAL DC1392A

QUICK START PROCEDURE

Figure 1. Test Setup of DC1392A

Demonstration circuit 1392A is an easy way to evaluate the

performance of the LTM4604AEV. Please refer to Figure 1

for proper measurement equipment setup and follow the

procedure below:

1. Place jumpers in the following positions for a typical

1.2VOUT application:

VO SELECT TRACK RUN/SS

1.2V OFF ON

2. With power off, connect the input power supply, load

and meters as shown in Figure 1. Preset the load to

0A and VIN supply within the operating range of the

LTM4604A.

3. Turn on the power at the input. The output voltage

should be 1.2V ±2%.

4. Once the proper output voltage is established, adjust

the load within the operating range and observe the

output voltage regulation, ripple voltage, efficiency and

other parameters

5. To measure input and output ripple, please refer to

Figure 2 for proper setup.

For optional load transient test, apply adjustable pulse

signal between IOSTEP CLK and GND pins. Pulse am-

plitude sets the current step. The pulse signal should

have very small duty cycle (<5%) to limit the thermal

stress on the transient load circuit. The output tran-

sient current can be monitored at BNC connector J1

(10mV/A), the output voltage can be monitored at BNC

connector J2.

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dc1392af

DEMO MANUAL DC1392A

QUICK START PROCEDURE

INPUT OR OUTPUT CAPACITOR

Figure 2. Scope Probe Placements for Measuring Input or Output Ripple

Figure 3. Measured Supply Efficiency with Different VIN and VOUT

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dc1392af

DEMO MANUAL DC1392A

PARTS LIST

ITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER

Required Circuit Components

1 2 C1, CO5 CAP., X5R, 100μF, 6.3V, 20%, 1812 TDK, C4532X5R0J107M

2 2 CIN1, CIN2 CAP., X5R, 10μF, 6.3V, 10%, 1206 AVX, 12066D106KAT2A

3 1 CO3 CAP., X5R, 22μF, 6.3V, 10%, 1206 AVX, 12066D226KAT2A

4 1 R5 RES., CHIP, 10k, 1/16W, 1%, 0603 VISHAY, CRCW060310K0FKEA

5 1 R2 RES., CHIP, 510k, 1/16W, 5%, 0603 VISHAY, CRCW0603510KJNEA

6 1 U1 I.C., LTM4604AEV LINEAR TECH., LTM4604AEV#PBF

Additional Demo Board Circuit Components

1 0 C2 (OPT) CAP., 0603

2 1 C3 CAP., X5R, 4.7μF, 6.3V, 10%, 0603 AVX, 06036D475KAT2A

3 0 CO1, CO2 (OPT) CAP., 1210

4 0 CO4 (OPT) CAP., 1812

5 0 CSS, CP, CFF (OPT) CAP., 0603

6 1 Q1 N-CHANNEL 30V MOSFET, TO-252 VISHAY, SUD50N03-10CP-E3

7 1 R1 RES., CHIP, 100K, 1/16W, 5% ,0603 VISHAY, CRCW0603100KJNEA

8 1 R3 RES., CHIP, 10K, 1/16W, 1%, 0603 VISHAY, CRCW060310K0FKEA

9 1 R4 RES., CHIP, 0.01Ω, 0.5W, 1% ,1206 VISHAY, WSL1206R0100FEA18

10 1 R6 RES., CHIP 5.76k, 1/16W, 1%, 0603 VISHAY, CRCW06035K76FKEA

11 1 R7 RES., CHIP 4.02k, 1/16W, 1%, 0603 VISHAY, CRCW06034K02FKEA

12 1 R8 RES., CHIP, 2.37k, 1/16W, 1%, 0603 VISHAY, CRCW06032K37FKEA

13 1 R9 RES., CHIP, 1.58k, 1/16W, 1%, 0603 VISHAY, CRCW06031K58FKEA

14 0 R10-R12 (OPT) RES., 0603

Hardware–For Demo Board Only

1 2 J1, J2 CONN, BNC, 5-PINS CONNEX, 112404

2 5 JP1-JP5 2MM SINGLE ROW HEADER, 2-PIN SAMTEC, TMM-102-02-L-S

3 2 JP6, JP7 2MM SINGLE ROW HEADER, 3-PIN SAMTEC, TMM-103-02-L-S

4 3 JP1, JP6, JP7 SHUNT SAMTEC, 2SN-BK-G

5 10 TP1, TP4-TP9, TP12, TP14, TP15 TESTPOINT, TURRET, 0.095" MILL-MAX, 2501-2-00-80-00-00-07-0

6 4 TP2, TP3, TP10, TP11 BANANA JACK KEYSTONE, 575-4

7 4 STAND OFF STAND-OFF, NYLON 0.50" TALL KEYSTONE, 8833 (SNAP ON)

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dc1392af

DEMO MANUAL DC1392A

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

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dc1392af

DEMO MANUAL DC1392A

Linear Technology Corporation

1630 McCarthy Blvd., Milpitas, CA 95035-7417

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

LT 0511 • 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 applica-

tion engineer.

Mailing Address:

Linear Technology

1630 McCarthy Blvd.

Milpitas, CA 95035

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