5 4 3 2 1 REVISION HISTORY ECO REV DESCRIPTION DATE PROD 1 04/12/13 APPROVED CHARLIE Z. D D U1 LTC3630AEMSE E1 VIN VIN C1 220nF 100V 0805 4V - 76V R5 4.7 0805 R2 OPT ON D1 OPT GND C2 4.7uF 100V 2220 R1 OPT L1 VIN SW VFB 68uH SUMIDA CDRH105 B A 5 2 3 RUN VPRG1 1 2 7 VOUT C9 1.8V/3.3V/5V 0.1uF 500mA GND E3 1 GND VOUT JP2 C E6 2 C10 OPT 1210 10 GND GND C8 OPT 1210 2 2 6 C7 100uF 10V 1210 C11 OPT 1210 C4 47nF 17 C3 220pF GND R4 220k SS 8 OPT ISET 14 11 VIN FBO GND R3 VPRG2 16 12 JP1 C6 100uF 10V 1210 R7 OPT B A 3 FBO C5 OPT R6 0 9 3 E5 E2 VOUT 1 JP3 OFF E4 C 1 3 B B NOTE: UNLESS OTHERWISE SPECIFIED 1. ALL RESISTORS AND CAPACITORS ARE 0603. 2 VOUT JP1 JP2 1.8V B B 3.3V A B 5.0V B A EXT. R A A A CUSTOMER NOTICE 1630 McCarthy Blvd. Milpitas, CA 95035 Phone: (408)432-1900 www.linear.com Fax: (408)434-0507 LTC Confidential-For Customer Use Only APPROVALS LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS; TECHNOLOGY HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO PCB DES. MI VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL APP ENG. CHARLIE Z. TITLE: SCHEMATIC APPLICATION. COMPONENT SUBSTITUTION AND PRINTED CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT HIGH EFFICIENCY, 76V, 500mA PERFORMANCE OR RELIABILITY. CONTACT LINEAR STEP-DOWN CONVERTER TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE. SIZE THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS. 5 4 3 LTC3630AEMSE DEMO CIRCUIT 2105A-A IC NO. N/A SCALE = NONE DATE: A SYNCHRONOUS 04/16/13 12:29:21 2 SHEET 1 1 REV. 1 OF 1