5 4 3 2 1 REVISION HISTORY ECO REV __ 2 DESCRIPTION PRODUCTION APPROVED DATE ZHONGMING Y. 1-9-12 D D E1 VIN C E3 1 R2 53.6K 1% GND C1 OPT 0805 U1 LT8300ES5 2 3 EN/UV VIN 5 R4 OPT SW 4 E2 4 VOUT- 2 GND RFB T1 3 2 C2 2.2uF 100V 1210 R1 806K 1% 6 1 750312366 SW R3 365K C4 D1 DFLS130L 2 1 C3 100uF 6.3V 1210 D2 5.6V BZT52C5V6T-7 * +5V SEE QSG C 1 VIN 22V - 75V E4 VOUT+ +5V / 0.25A 3.3nF 250 1210 B B NOTE: UNLESS OTHERWISE SPECIFIED 1. ALL RESISTORS AND CAPACITORS ARE 0603. CUSTOMER NOTICE 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. HZ VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL APP ENG. ZHONGMING Y. TITLE: SCHEMATIC APPLICATION. COMPONENT SUBSTITUTION AND PRINTED CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT PERFORMANCE OR RELIABILITY. CONTACT LINEAR TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE. A 1630 McCarthy Blvd. Milpitas, CA 95035 Phone: (408)432-1900 www.linear.com Fax: (408)434-0507 LTC Confidential-For Customer Use Only A 100V MICROPOWER ISOLATED FLYBACK CONVERTER SIZE THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS. 5 4 3 IC NO. N/A SCALE = NONE DATE: REV. LT8300ES5 2 DEMO CIRCUIT 1825A Wednesday, July 11, 2012 2 SHEET 1 1 OF 1