Linear Technology DC1900A Demo Manual Download Page 6

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dc1900af

DEMO MANUAL DC1900A

Linear Technology  Corporation

1630 McCarthy Blvd., Milpitas, CA 95035-7417  

(408) 432-1900 

 

FAX

: (408) 434-0507 

 

www.linear.com

 

LINEAR TECHNOLOGY CORPORATION 2013

LT 0913 • 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

Copyright © 2004, Linear Technology Corporation

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Summary of Contents for DC1900A

Page 1: ... respective owners Performance Summary Board Photo few input and output capacitors Output voltage tracking is available through the TRACK SS pin for supply rail se quencing External clock synchronization is also available through the CLKIN pin The LTM4644 data sheet must be readinconjunctionwiththisdemomanualpriortoworking on or modifying demo circuit 1900A Design files for this circuit board are ...

Page 2: ... voltage supply and meters as shown in Figure 1 4 Turn on input power supply The output voltage meters for each phase should display the programmed output voltage within 2 5 Once the proper output voltage is established adjust the load currents for each phase within the 0A to 4A range and observe the load regulation efficiency and other parameters 6 To observe increased light load efficiency place...

Page 3: ... Measured VOUT1 3 3V and VOUT4 1 2V Load Transient Responses 2A to 4A Load Step Figure 4 Measured Thermal Capture with All Phases at Full Load 4A 20µs DIV DC1900A F03a VOUT1 200mV DIV VIN 12V VOUT 3 3V 2 47µF 6 3V CERAMIC LOAD STEP SLEW RATE 1A µs IOUT1 2A DIV 20µs DIV DC1900A F03b VOUT4 200mV DIV IOUT4 2A DIV VIN 12V VOUT 1 2V 2 47µF 6 3V CERAMIC LOAD STEP SLEW RATE 1A µs DC1900A F04 VIN 12V VOUT...

Page 4: ...C30 C38 C33 C34 CAP 1206 CER OPTION OPTION 6 2 C13 C32 CAP 0603 CER 100PF AVX 06033C101KAT2A 7 4 R7 R8 R15 R16 RES 0603 0Ω 1 1 10W VISHAY CRCW06030000Z0ED 8 1 R28 RES 0805 0Ω 5 1 16W VISHAY CRCW08050000Z0EA 9 4 R19 R20 R21 R22 RES 0603 150kΩ 5 1 10W VISHAY CRCW0603150KJNEA 10 4 R23 R24 R25 R26 RES 0603 100kΩ 5 1 10W VISHAY CRCW0603100KJNEA 11 4 R9 R10 R17 R18 RES 0603 OPTION OPTION 12 12 R32 R35 R...

Page 5: ...ATION 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 3 LTM4644EY Tuesday April 23 2013 1 1 QUAD 4A STEP DOWN MODULE REGULATOR LT S...

Page 6: ...CEPT 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...

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