1 2 3 7 8 C5 (Opt.) 1206 2 D5 LED (White) 11 GND D16 LED (White) B D12 LED (White) FB2 5 C3 1uF 50V D14 LED (White) 6 R1 15 1% Gnd 2 JP2 Vout2 3 SHDN CTRL1 7 1 ENABLE E6 CTRL2 C E5 1 ENABLE 3 R2 147K 1% SHDN JP1 Vout1 2 R3 15 1% 8 9 E4 D17 LED (White) C 4 FB1 D15 LED (White) D10 LED (White) CTRL2 10 D8 LED (White) U1 LT3466EDD VOUT2 RT D13 LED (White) VOUT1 CTRL1 1 C2 1uF 50V A D6 LED (White) SW2 D11 LED (White) VIN 2 SW1 D9 LED (White) E3 D4 LED (White) L2 68uH D62CB680M 3 L1 68uH D62CB680M D7 LED (White) C6 (Opt.) 1206 D2 LED (White) D18 BAT54A (Opt.) D3 LED (White) B Vout2 Test 24V-28V 3 C1 1uF 16V E2 D1 LED (White) A Gnd 6 Vin 3V-8V or 3V-20V (With Diode Option) C4 (Opt.) 1206 E1 5 1 Vout1 Test 34V-40V 4 kevin lac E7 Customer Notice D LTC CONFIDENTIAL - FOR CUSTOMER USE ONLY 1 2 3 LINEAR TECHNOLOGY CORPORATION Linear Technology Has Made A Best Effort To Design A Circuit That Meets Customer-Supplied Specifications; However, It Remains The Customer's 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 Technology Applications Engineering For Assistance. This Circuit Is Proprietary To Linear Technology And Supplied For Use With Linear Technology Parts. 4 5 Title 1630 McCARTHY BLVD. MILPITAS, CA. 95035 PHONE (408) 954-8400 FAX (408) 434-0507 D Dual High Efficiency White LED ( 7/10 ) Driver Size A Document Number Date: Monday, October 06, 2003 DC723A 6 Rev LT3466EDD 7 Sheet 1 of 8 1