5 4 3 2 1 C1 7 ENF B1 OPT 6 SW1 R3 GND ENT CPO 2 ILED 3 C2 4.7uF 6.3V GND 9 CP + 4 8 E3 C3 2.2uF 10V ISETT GND C4 4.7uF 6.3V VIN 5 E1 10 ISETF 2.9V - 4.5V VIN D U1 LTC3218EDDB CM 1 2.2uF 10V + D1 AOT2015 11 D C C LED ON R1 10.0K 1% SW2 FLASH ENT 0V - VIN B OPT R2 20.5K 1% E2 ENF 0V - VIN E4 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. 5 ENT ILED 0 0 0mA 0 1 1 50mA 0 300mA 1 1 400mA B CUSTOMER NOTICE A ENF 4 CONTRACT NO. APPROVALS DRAWN DATE Nick Carlone 12/18/06 TECHNOLOGY 1630 McCarthy Blvd. Milpitas, CA 95035 Phone: (408)432-1900 Fax: (408)434-0507 TITLE CHECKED LTC3218EDDB, 400mA Single Wire Camera LED Charge Pump APPROVED ENGINEER Marty Merchant 12/18/06 DESIGNER SIZE CAGE CODE DWG NO REV A DC1030A Monday, March 05, 2007 3 SCALE: FILENAME: 2 SHEET 1 OF 1 1 A