5 4 3 2 1 REVISION HISTORY E1 ECO VIN VIN REV DESCRIPTION 2 PRODUCTION J1 DATE APPROVED 08/04/11 ZHONGMING Y. VIN CIN1 1.8V - 4.5V CIN2 100uF 6.3V D J2 + 1210 1210 GND CIN3 100uF 6.3V 270uF 10V D VIN E2 GND VIN D1 L1 2 E7 U1 2.2uH 3 C1 R2 C2 C3 22nF R3 0.1uF 5.1k 1% SYNC 3 1 ON Q1 8 1 SENSE 15.8k 1% 4 5 RT SYNC FBX 100uF 6.3V 1210 100uF 6.3V 1210 E4 C VOUT 7 R5 0815 2 6 100k 1% E6 PG PGOOD 13 PGOOD CO2 RCS1 0.005 4 CO1 GND SS VC RFBA VOUT 5V / 2.0A RFBB INTVCC GATE VOUT 34k 1% Si7858ADP R4 SYNC 10 C4 120pF E5 DRIVE 4.7uF 0805 9 887k 1% JP1 EN_UVLO 1 2 3 OFF C 12 SBR3U20SA 5 2 1 VOUT VIN 1 ON LT3759EMSE 348k 1% GND EN 11 R1 EN B E3 16.9k 1% B 2 OFF 3 JP2 CUSTOMER NOTICE 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. MI VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL APP ENG. ZHONGMING Y. APPLICATION. COMPONENT SUBSTITUTION AND PRINTED CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT PERFORMANCE OR RELIABILITY. CONTACT LINEAR TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE. A TECHNOLOGY TITLE: SCHEMATIC LOW INPUT VOLTAGE BOOST CONVERTER SIZE THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS. 5 4 N/A SCALE = NONE 3 1630 McCarthy Blvd. Milpitas, CA 95035 Phone: (408)432-1900 www.linear.com Fax: (408)434-0507 LTC Confidential-For Customer Use Only LT3759EMSE IC NO. REV. DEMO CIRCUIT 1725A DATE: Tuesday, November 08, 2011 2 SHEET 1 1 2 OF 1 A