4 GND C2 2.2uF 50V 1206 E2 E3 VIN R1 100k 5% 3 SHDN SW 6 DA 5 CAP 8 SHDN R3 0.4 1% LED + 0805 C4 4.7uF 16V 0805 D1 DFLS140 E6 2 4 D SUMIDA 3 + 200/20mV 1 E1 VIN 6V - 36V 1 C3 CDRH3D18 0.1uF L2 16V 4.7uH 1 U1 LT3592EDDB 2 2 D 3 BOOST 7 5 LED1 LR W5SM RED OSRAM _ 1 RT R2 48.7k 1% 2.2MHz C 2 BRIGHT 3 R4 51.1k 1% VFB 10 R5 10k 1% 1 GND E5 2 GND E4 BRIGHT 11 C OUT 9 LED2 LR W5SM RED OSRAM E7 GND B B CONTRACT NO. APPROVALS A DRAWN: NOTE: UNLESS OTHERWISE SPECIFIED CHECKED: 1. ALL RESISTORS ARE IN OHMS, 0402. ALL CAPACITORS ARE IN MICROFARADS, 0402. APPROVED: ENGINEER: KEITH S. DESIGNER: TECHNOLOGY KIM T. TITLE: SCHEMATIC 4 3 A STEP-DOWN 500mA LED DRIVER WITH 10:1 DIMMING SIZE DWG NO. A DATE: 5 1630 McCarthy Blvd. Milpitas, CA 95035 Phone: (408)432-1900 Fax: (408)434-0507 LTC Confidential-For Customer Use Only DC1205A-1 * LT3592EDDB Thursday, April 24, 2008 2 SHEET 1 1 REV A-1 OF 1