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 DATE PROD A APPROVED 06/29/07 D C2 1 2 1uF E1 VIN R1 C5 4.5V - 55V E2 GND 50V 10uF 100V OPT 0.47uF 100V L1 ON C4 0.1uF VREG 5 LED 10 GND OFF 6 GND R3 1 CTRL 2 3 1 0.1uF JP1 2 C3 2 2 100K 1% 1 SW U1 330uH LT3590EDC COILCRAFT LPS3010-334ML C 3 7 R2 1 E3 VIN 4 C CTRL E5 LED+ 1 to 10 LEDS LED50mA 4.02 1% C1 + E4 E6 VREG B B 3.3V, 1mA CONTRACT NO. APPROVALS DRAWN MEI CHECKED A DATE 06/29/07 TECHNOLOGY TITLE 1630 McCarthy Blvd. Milpitas, CA 95035 Phone: (408)432-1900 Fax: (408)434-0507 SCH, LT3590EDC, 48V BUCK-MODE LED DRIVER A APPROVED ENGINEER DESIGNER Thursday, July 12, 2007 5 4 3 SIZE CAGE CODE SCALE: DWG NO FILENAME: 2 REV DC1166A 1166A-A.DSN SHEET A 1 1 OF 1