5 4 3 2 1 REVISION HISTORY L1 15uH 2 ECO REV _ 2 DESCRIPTION APPROVED PRODUCTION MOLLY Z. DATE 3-09-15 3 IHCL-4040DZ-5A D 1 D 4 C8 2.2uF D1 MBRA2H100T3G 100V 1210 R6 169k (450kHz) 20 WDO SS RST RT WDI NC R10 1 Meg C7 1uF CWDT NC C5 4.7nF 10 FB R4 100K 1% C3 47uF 10V 1210 C4 47uF 10V 1210 3 15 16 13 E5 E6 SWEN B E9 R11 OPT E7 WDE RST GND NOTES: UNLESS OTHERWISE SPECIFIED A CUSTOMER NOTICE E8 WDO RST WDI B WDE 1 2 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 TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE. THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS. 5 C JP1 1. ALL RESISTORS AND CAPACITORS ARE 0603. * THE MAX LOAD CURRENT IS REDUCED WHEN THE INPUT VOLTAGE IS LESS THAN 12V. PLEASE SEE DEMO MANUAL FOR DETAILS. GND R2 316K 1% 7 WDE C9 1uF E4 19 8 C6 1nF CPOR R3 100K 1% VOUT 5V / 1A * R5 8.87K 1% 2 FB GND 6 C11 4.7pF 11 RSTIN 17 5 E2 SWEN GND 12 C2 2.2uF 100V 1206 21 C1 10uF 63V NC GND + 14 3V - 60V * NC C R1 1 Meg 1% C10 OPT 1 BIAS VIN 9 18 4 E1 VIN R9 0 SW U1 LT8495EFE E3 4 3 TECHNOLOGY LT MOLLY Z. TITLE: SCHEMATIC SIZE IC NO. DATE: SEPIC CONVERTER WITH LOW IQ, POR AND WATCHDOG TIMER A REV. LT8495EFE N/A SCALE = NONE 1630 McCarthy Blvd. Milpitas, CA 95035 Phone: (408)432-1900 www.linear.com Fax: (408)434-0507 LTC Confidential-For Customer Use Only 2 DEMO CIRCUIT 2205A Monday, March 09, 2015 SHEET 1 2 1 OF 1