Linear Technology DC1084A-A Guía de configuración rápida

dc1084a-af

DEMO MANUAL DC1084A-A

DESCRIPTION

LTM4602

20V, 6A Step-Down

µModule Regulator

Demonstration circuit DC1084A-A features the LTM

4602,

the high efficiency, high density step-down μModule

regulator. The input voltage range is from 5V to 20V. The

output voltage is jumper programmable from 0.6V to 5V,

refer to the step-down ratio curve in the LTM4602 data

sheet. The rated load current is 6A, while derating is

necessary for certain VIN, VOUT and thermal conditions. 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 LTM4602 data sheet must be read in conjunction with

this demo manual prior to working on or modifying demo

circuit DC1084A-A.

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 4.5V to 20V

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

6A DC

Default Operating Frequency 800kHz

dc1084a-af

DEMO MANUAL DC1084A-A

QUICK START PROCEDURE

Figure 1. Test Setup of DC1084A-A (EXTVCC Bias Supply is Optional)

Demonstration circuit DC1084A-A is an easy way to

evaluate the performance of the LTM4602EV. 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

1.5VOUT application:

FCB RUN/SS VOUT SEL

CCM ON 1.5V

2. With power off, preset the load to 0A and VIN supply

to be less than 20V. Connect the input power supply,

load, optional 5V bias supply and meters as shown

in Figure1. The optional 5V bias supply must be off

anytime the supply to VIN is turned off.

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

should be 1.5V ±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. Output ripple should be measured at

J6 with a BNC cable.

5. 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 (<15%) to limit the thermal

stress on the transient load circuit. The output tran-

sient current can be monitored at BNC connector J5

(10mV/A).

dc1084a-af

DEMO MANUAL DC1084A-A

QUICK START PROCEDURE

Figure 2. Measured Supply Efficiency with Different VIN and VOUT

(FADJ Open: 1.2VOUT to 2.5VOUT, FADJ = 15kΩ: 3.3VOUT to 5VOUT)

Figure 3. Measured Load Transient Response (0A-5A Step)

VIN = 12V, VOUT = 1.5V

0A to 5A LOAD STEP

FCB = 0V

COUT = 1 ×22μF CERAMIC (1206), 1 ×100μF CERAMIC (1812),

C3 = 100pF

dc1084a-af

DEMO MANUAL DC1084A-A

PARTS LIST

ITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER

Required Circuit Components

1 1 C1 CAP, 150μF 20% 35V ALUM SANYO 35MV150WXV (Now SUNCON 35MV150WXV)

2 2 C5, C2 CAP, 1206 10μF 20% 35V X5R TAIYO YUDEN GMK316 BJ106ML-T

3 1 C10 CAP, 1206 22μF 20% 6.3V X5R AVX 12066D266MAT2A

4 1 C7 CAP, 1812 100μF 20% 6.3V X5R TDK C4532X5R0J107MZ

5 1 C12 CAP, 0603 100pF 10% 50V X7R AVX 06035C101KAT1A

6 1 R2 RES, 0603 66.5k 1% 1/10W AAC CR16-6652FM

7 1 R8 RES, 0603 0Ω JUMPER ACC CJ06-000M

8 1 U1 IC, LTM4602EV LINEAR TECH. LTM4602EV

Additional Demo Board Circuit Components

1 0 C4, C3 CAP, 1206 OPTION TAIYO YUDEN EMK316BJ475ML-T OPTION

2 0 C8 CAP, 1812 100μF 20% 6.3V X5R OPTION TDK C4532X5R0J107MZ OPTION

3 0 C6 CAP, 1812 OPTION TAIYO YUDEN JMK432BJ107MU-T OPTION

4 0 C11, C14, C18, C19 CAP, 0603 OPTION OPTION

5 1 C13 CAP, 0603 100pF 10% 50V NPO AVX 06035A101KAT

6 2 C15,C16 CAP, 0603 1μF 20% 10V X5R TAIYO YUDEN LMK107BJ105MA-T

7 0 C17 CAP, 0805 1μF 20% 16V X5R OPTION TAIYO YUDEN EMK212BJ105MG-T OPTION

8 1 D1 DIODE, ZENER 4.7V DIODES INC. BZX84C4V7

9 1 Q14 XSTR, SUD50N03-10CP MOSFET SILICONIX SUD50N03-10CP

10 1 R1 RES, 0603 49.9k 1% 1/10W AAC CR16-4992FM

11 1 R3 RES, 0603 31.6k 1% 1/10W AAC CR16-3162FM

12 1 R4 RES, 0603 22.1k 1% 1/10W AAC CR16-2212FM

13 1 R5 RES, 0603 13.7k 1% 1/10W AAC CR16-1372FM

14 3 R6, R10, R12 RES, 0603 10k 5% 1/10W VISHAY CRCE060310K0JNEA

15 1 R7 RES, 0603 5.1k 5% 1/10W AAC CR16-512JM

16 1 R9 RES, 0603 1M 5% 1/16W AAC CR16-105JM

17 1 R11 RES, 2512 0.01Ω 5% 1W IRC LRF2512-01-R010-J

18 0 R13 RES, 0603 OPTION OPTION

19 1 R14 RES, 0603 100k 1% 1/10W AAC CR16-1003FM

dc1084a-af

DEMO MANUAL DC1084A-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

dc1084a-af

DEMO MANUAL DC1084A-A

Linear Technology Corporation

1630 McCarthy Blvd., Milpitas, CA 95035-7417

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

LT 0911 • 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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