Linear Technology DC1041A-B Manual de usuario

dc1041a-bf

DEMO MANUAL DC1041A-B

DESCRIPTION

LTM4601HV

5VIN to 28VIN,

12A Step-Down

µModule Regulator

Demonstration circuit DC1041A-B features the

LT M

4601HVEV, a 12A high efficiency, high density

switch mode step-down converter. The input voltage

range is from 4.5V to 28V. The output voltage is jumper

selectable for popular voltages from 0.6V to 5V. The PLLIN

pin supports synchronizing the μModule

regulator to

an external clock. The TRACK/SS pin allows the user to

program output ramp-up and ramp-down rates which

may coincidentally or ratiometrically track with another 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.

PERFORMANCE SUMMARY

BOARD PHOTO

supply’s output if desired. Output voltage margining of

±5% from the nominal value is available via the margin

control pins MARG0 and MARG1. The LTM4601HV data

sheet must be read in conjunction with this demo manual

prior to working on or modifying demo circuit DC1041A-B.

Design files for this circuit board are available at

http://www.linear.com/demo

(TA= 25°C)

PARAMETER CONDITION VALUE

Input Voltage Range 4.5V to 28V

Output Voltage VOUT Jumper Selectable (Open for 0.6V) 1.2V, 1.5V, 1.8V, 2.5V, 3.3V, 5V

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

Thermal Conditions

12A DC

Default Operating Frequency 800kHz

External Synchronous Clock Frequency Range Refer to Data Sheet for Details 560kHz to 1000kHz

Efficiency VIN = 12V, VOUT = 1.5V, IOUT = 12A 83%, See Figure 2

dc1041a-bf

DEMO MANUAL DC1041A-B

QUICK START PROCEDURE

Figure 1. Demo Board Setup

Demonstration circuit DC1041A-B is an easy way to evalu-

ate the performance of the LTM4601. Please refer to

Figure1 for proper measurement equipment setup and

follow the procedure below:

1. With the power supply off, connect the input power

supply, load and meters as shown in Figure 1. Preset

the load to 0A and power supply voltage within the

LTM4601’s operating input voltage range.

2. Place jumpers in the following positions for a typical

1.5VOUT application:

MARG0 MARG1 RUN VOUT SELECT

LO LO ON 1.5V

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

should be 1.5V ±1%.

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. Output ripple should be measured at J4

with a BNC cable.

5. For optional load transient test, apply an adjustable

pulse signal between IOSTEP (E3) and GND pins.

Pulse amplitude sets the current step. The pulse signal

should have very small duty cycle (<15%) to limit the

thermal stress on the transient load circuit. The output

transient current can be monitored at BNC connector

J3 (10mV/A).

6. For Margining function test, place jumper MARG0 and

MARG1 in the configurations shown in the following

table, measure the output voltage at J4.

MARG1 MARG0 ΔVOUT

LO LO 0

LO HI 5%

HI LO –5%

HI HI 0

dc1041a-bf

DEMO MANUAL DC1041A-B

QUICK START PROCEDURE

Figure 2. Measured Supply Efficiency with Different VIN and VOUT

VIN = 12V

VOUT = 1.5V

0A TO 10A LOAD STEP

COUT = 1 ×22μF CERAMIC, 2 ×100μF CERAMIC, C5 = 47pF

Figure 3. Measured Load Transient Response (0A to 10A Step)

dc1041a-bf

DEMO MANUAL DC1041A-B

PARTS LIST

ITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER

Required Circuit Components

1 1 CIN1 Cap., Alum 150μF 35V 20% Sanyo 35ME150WXV (now SUNCON 35ME150WXV)

2 2 CIN2, CIN3 Cap., X7R 10μF 35V 20% Taiyo Yuden GMK316BJ106ML-T

3 2 COUT1, COUT2 Cap., X5R 100μF 6.3V 20% Taiyo Yuden JMK432BJ107MU-T

4 1 COUT4 Cap., X5R 10μF 10V 10% Taiyo Yuden LMK316BJ106KL-T

5 1 CSS Cap., X7R 0.1μF 16V 20% AVX 0603YC104MAT2A

6 1 R4 Res., Chip 392k 0.1W 1% AAC CR16-3923FM

7 2 R8,R5 Res., Chip 10Ω 0.1W 5% AAC CR16-100JM

8 1 R19 Res., Chip 30.1k 0.06W 1% AAC CR16-3012FM

9 1 U1 I.C., Volt. Reg. Linear Technology Corp. LTM4601EV

Additional Demo Board Circuit Components

1 0 CIN4, CIN5 Cap., 1206 TBD

2 0 COUT3 Cap., 1210 TBD

3 0 C3, C4, C5, C6, C7 Cap., 0603 TBD

4 2 C1, C2 Cap., X5R 1μF 10V 10% Taiyo Yuden LMK107BJ105KA

5 1 D1 Zener Diode, 5.1V On Semi. MMBZ5231B

6 1 Q1 MOSFET, N-Channel 30V Siliconix SUD50N03-10

7 0 R6, R9, R11, R12, R18 Res., 0603 TBD

8 2 R17, R1 Res., Chip 10k 0.1W 5% AAC CR16-103JM

9 1 R2 Res., LRC 0.010Ω 0.25W 1% IRC LRF1206-01-R010-F

10 1 R3 Res., Chip 51k 0.1W 5% AAC CR16-513JM

11 3 R7, R10, R23 Res/Jumper, Chip 0Ω 1/16W 1A AAC CJ06-000M

12 1 R14 Res., Chip 49.9k 0.06W 1% AAC CR16-4992FM

13 1 R15 Res., Chip 60.4k 0.1W 1% AAC CR16-6042FM

14 1 R16 Res., Chip 40.2k 0.1W 1% AAC CR16-4022FM

15 1 R20 Res., Chip 19.1k 0.1W 1% AAC CR16-1912FM

16 1 R21 Res., Chip 13.3k 0.1W 1% AAC CR16-1332FM

17 1 R22 Res., Chip 8.25k 0.1W 1% AAC CR16-8251FM

dc1041a-bf

DEMO MANUAL DC1041A-B

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

dc1041a-bf

DEMO MANUAL DC1041A-B

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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