0603 C2+ 1 C2- 10 C1+ 2 C1- 12 EN2 8 CPO 3 VIN EN1 EN2 2 B 2 3 3 4 5 6 7 4 RA5 VSS 14 RA0 13 RA4 RA1 MCLR# RA2 RC5 RC0 RC4 RC1 RC3 RC2 VDD 12 LED1 LXCL-PWF1 200mA/800mA LUMILEDS C2 4.7uF,6.3V 0603 11 10 13 11 9 8 R6 10k PIC16F630I/ST R7 10k B CONTRACT NO. 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 CIRUIT 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 R4 6.34k 1% SW3 BOURNS-7914J 1 2 ON/OFF CUSTOMER NOTICE 1. ALL RESISTORS ARE IN OHMS, 0402. + 1 1 R2 1K NOTES: UNLESS OTHERWISE SPECIFIED 6 4 R3 19.1k 1% U2 LED2 LTST-C155KGJRKT 1 ILED 5 C SW2 BOURNS-7914J 1 2 Torch R1 1K U1 LTC3216EDE GND 7 GND EN1 ISET2 C6 2.2uF,6.3V 0603 D 2 1 1 9 R5 10k SW1 BOURNS-7914J 1 2 Flash 5 0603 ISET1 BT1 2479 PC MOUNT KEYSTONE C A C3 2.2uF,6.3V 2 VIN C4 0.1uF,6.3V 1 C1 2.2uF,6.3V 2 3 4 5 2 C5 0.1uF,6.3V PLASTIC BATTERY HOLDER HOLDS 3 AAA CELLS IN SERIES + 4 6 6 JP1 HD2X3-079 OPT D 3 3 4 5 5 3 APPROVALS DRAWN: CHECKED: APPROVED: ENGINEER: KEITH S. DESIGNER: TECHNOLOGY KIM T. TITLE: 1630 McCarthy Blvd. Milpitas, CA 95035 Phone: (408)432-1900 Fax: (408)434-0507 LTC Confidential-For Customer Use Only SCHEMATIC A LOW NOISE HIGH CURRENT LED CHARGE PUMP SIZE DWG NO. A DATE: DC805A-1* LTC3216EDE Thursday, September 09, 2004 2 SHEET 1 1 REV A OF 1