1 VIN E2 VOUT L2 C3 10uF LTC3524EUF R2 324K C10 10uF LED1 LED1 19 1 LED2 18 1 LED2 2 1 2 1 LED5 3 PBVO E4 1 PMEG3005EA VLED 20 R1 1M PROG 23 R10 LED3 2 1 LED6 LED4 2 1 LED7 2 1 A 2 LED8 2 1 2 100K ELED1 24 7 C2+ ECLD 1 6 C2- VNIN 9 15 VH E5 Vout R5 470K R3 1M 14 FBH 1 2 D2 MA3X704E C9 0.1uF D4 R9 4.7M E7 E8 VOFF -7.5V@2mA GND V2X JP4 D3 2 1 PMEG3005EA 3 JP2 LED1 ON OFF 2 ON OFF 2 C8 0.1uF 1 R8 4.7M C11 0.47uF 25 GND 11 NC E6 VN 12 10 CN+ 16 CH+ R4 107K JP1 VON ON OFF 2 R6 1M Vin JP3 LED2 R7 4.7M Vin FBN 13 17 CH- C7 0.47uF Vin 1 ELED2 22 3 C6 0.1uF 8 V2X 1 C4 0.47uF GND 2 4 VOUT V2X VH 12.5V@2mA D1 3.3uH 3 E3 U1 10uH 2 PMEG3005EA VOFF 1 GND L1 1 A VOUT 5V@25mA C2 10uF 3 GND C1 47uF 10V SW2 21 + VIN 2 E1 SW1 5 VIN 2.5V - 4.6V 2 R11 0 NV (Normal Voff) 2 B B 3 HV (High Voff) C12 0.47uF CUSTOMER NOTICE 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. 1 CONTRACT NO. APPROVALS DRAWN HELEN DATE 1/4/07 CHECKED APPROVED ENGINEER Kevin Huang 1/4/07 DESIGNER Wednesday, March 12, 2008 TECHNOLOGY 1630 McCarthy Blvd. Milpitas, CA 95035 Phone: (408)432-1900 Fax: (408)434-0507 TITLE LTC3524EUF Adjustable TFT Bias Supply with White LED Driver SIZE CAGE CODE SCALE: FILENAME: 2 DWG NO REV A DC1121A SHEET 1 OF 1