5 D 4 3 2 1 REVISION HISTORY 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 REV DESCRIPTION 3 DATE PROD APPROVED 02/06/05 D U1 LT3493EDCB C9 63V + 2 10uF [2] C2 1uF 50V R5 100K 1% 3 C SHDN JP1 2 C11 6 SHDN 2 GND SW 4 D2 1 CMDSH-4E 2 C3 0.1uF D1 MBRM140T3G FB 1 L1 E3 10uH TAIYO YUDEN C7 [1] C 22uF R1 20K E4 1% 0.1uF VOUT 3.3V [2] C1 NP05DZB100M 1 RUN BOOST 3 2 4.5V - 36V 5 VIN 1 E1 1 VIN GND R2 6.19K GND 1% E9 B B NOTES: UNLESS OTHERWISE SPECIFIED, [1] DO NOT STUFF. [2] VIN 4.5V A 8V IOUT (MAX) CONTRACT NO. 0.95A APPROVALS DRAWN 1.2A MEI DATE 03/21/05 CHECKED TECHNOLOGY TITLE SCH, LT3493EDCB, 1.2A, 750KHz STEP-DOWN SWITCHING ENGINEER Tuesday, February 07, 2006 5 4 3 A REGULATOR IN 2mmX3mm DFN APPROVED DESIGNER 1630 McCarthy Blvd. Milpitas, CA 95035 Phone: (408)432-1900 Fax: (408)434-0507 SIZE CAGE CODE SCALE: DWG NO FILENAME: 2 897A-3.DSN REV DC897A SHEET 3 1 1 OF 1