5 D 4 3 2 This circuit is proprietary to Linear Technology and supplied for use with Linear Technology parts. Customer Notice:Linear Technology has made a best effort to design a circuit that meets customer-supplied specifications; however, it remains the customers responsibility to verify proper and reliable operation in the actual application, Component substitution and printed circuit board layout may significantly affect circuit performance or reliability. Contact Linear Applications Engineering for assistance. ECO 2 OFF 1 R3 SHDN J5 4 SHDN C3 10K 12V [1] VOUT UPS120 0.1uF LT1935ES5 SW 1 2 JP1 U1 GND 0805 ON VOUT APPROVED 01/26/04 D1 1A 1 C2 POWERMITE J3 10uF R2 C4 86.6K 10pF 0603 0603 1206 C FB 3 R1 10K 2 10V C 3 VIN 5 4.7uF DATE PROTO 3.3uH TDK SLF7028T-3R3M1R6 C1 DESCRIPTION D VIN J1 REV 2 L1 3.3V-5V 1 REVISION HISTORY 0603 GND GND J4 J2 B B [1] VIN VOUT 3.3V 12V @ 400mA 5V 12V @ 600mA CONTRACT NO. APPROVALS DRAWN MEI CHECKED A DATE 05/01/03 TECHNOLOGY TITLE 1630 McCarthy Blvd. Milpitas, CA 95035 Phone: (408)432-1900 Fax: (408)434-0507 SCH, LT1935ES5 BOOST CONVERTER A APPROVED ENGINEER DESIGNER Friday, February 06, 2004 5 4 3 SIZE CAGE CODE SCALE: DWG NO FILENAME: 683A-2.DSN 2 REV DC683A SHEET 2 1 1 OF 1