5 3 2 ECO 1 GND 10uH + C1 22uF E2 C3 0.47uF 63V 1 C 2 SHDN 3 C2 2.2uF 50V R1 100K 4 E3 1 BD RT 10 2 BOOST VC 9 3 SW FB 8 4 VIN PGOOD 7 SYNC 6 5 C4 0.1uF 50V R3 20K C6 C5 680pF 100pF C RUN/SS R4 110K R5 590K E4 C7 22uF R6 10V 100K C8 0.1uF 50V E6 E7 CONTRACT NO. APPROVALS DRAWN MEI CHECKED DATE 10/05/06 TECHNOLOGY TITLE APPROVED ENGINEER DESIGNER Monday, April 30, 2007 5 4 3 SIZE VOUT 5V@2A E5 B A APPROVED 1% R2 60.4K 50V JP1 RUN EXTSS EXTSS U1 LT3685EMSE 60V TRANSIENT 6.3V - 38V DATE 10/05/06 L1 GND VIN DESCRIPTION PROTO D DFLS240L E1 REV 1 D1 2 1 REVISION HISTORY 11 D 4 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. GND PGOOD B SYNC 1630 McCarthy Blvd. Milpitas, CA 95035 Phone: (408)432-1900 Fax: (408)434-0507 SCH, LT3685EMSE, 2A, 38V STEP-DOWN SWITCHING REGULATOR WITH SYNC FUNCTION CAGE CODE SCALE: DWG NO FILENAME: 2 1167A-1.DSN REV DC1167A SHEET 1 1 1 OF 1 A