A B C D E REVISION HISTORY ECO REV ON OFF 1 VOUT DATE 03-29-10 WALKER B. 4 U1 11 E2 10 R4 200k R5 10 ** PG RUN/SS NC VIN exposed pad, solder side DA VIN C6 0.1uF 50V 0603 5 C1 2.2uF 50V 1206 + CIN 10uF 63V 63CE10GA 8 E1 VIN 6.9V * - 36V TRANSIENT TO 60V E4 GND 2 2 R3 100k PGOOD PRODUCTION APPROVED 1 2 3 JP1 RUN 4 DESCRIPTION D1 MBRM140T3 L1 10uH 9 VC SW 6 R2 40.2k 1% C5 470pF 50V BOOST 12 GND OUT1 3 VOUT E3 16 C2 10uF 10V 1206 C3 0.47uF 10V 0603 14 E5 7 C7 220pF 50V E6 FIXED FREQ ** SYNC ** 1 2 3 4 SYNC 2 ASSY TYPE U1 VOUT DC1578A-A LT3695EMSE-3.3 3.3V DC1578A-B LT3695EMSE-5 SEE QUICK START GUIDE CUSTOMER NOTICE 1 * GND JP2 MODE BURST MODE * 1A 13 NC NC PGND VOUT C4 0.22uF 16V 15 2 SYNC 3 1 PGND OUT2 17 R1 16.2k 1% RT 4 1 3 APPROVALS LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS; HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO PCB DES. VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL APP ENG. APPLICATION. COMPONENT SUBSTITUTION AND PRINTED CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT PERFORMANCE OR RELIABILITY. CONTACT LINEAR NOTE: UNLESS OTHERWISE SPECIFIED TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE. 1. ALL RESISTORS ARE IN 0402. ALL CAPACITORS ARE IN 0402. 2. INSTALL SHUNTS AS SHOWN. A TECHNOLOGY JW WALKER B. B N/A SCALE = NONE C 1630 McCarthy Blvd. Milpitas, CA 95035 Phone: (408)432-1900 www.linear.com Fax: (408)434-0507 LTC Confidential-For Customer Use Only TITLE: SCHEMATIC SIZE THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS. 5V DATE: 1A FAULT TOLERANT MICROPOWER STEP-DOWN SWITCHING REGULATOR IC NO. LT3695EMSE-3.3/5 DEMO CIRCUIT 1578A-A / B 03-29-10 SHEET D E 1 REV. 1 1 OF 1