5 E2 C1 + C6 47uF 10V GND C5 0.22uF C2 2.2uF 1.0uF E4 1 2 Vin Vout 6 C+ GND 4 SHDN/FB C- Vout C3 C7 * R1 4.7uF 3 E1 R3 GND * * GND E3 Vin 7 2 R2 * C4 0.22uF * 1 * Vin * * * JP1 Vout ON OFF 3 U1 Vin VERSION TABLE Vout/Iout(max) ASSEMBLY VERSION U1 Vin DC862A-A LTC3221EDC-3.3 1.8V-4.4V 3.3V/60mA DC862A-B LTC3221EDC-5 2.7V-5.5V DC862A-C LTC3221EDC 1.8V-3.8V ** R2 R3 R1 C7 JP1 3.32M DO NOT INSTALL INSTALL 5.0V/60mA 3.32M DO NOT INSTALL INSTALL 3.0V/60mA 107K 154K 0 OHM 220pF DO NOT INSTALL ** See Quick Start Guide for Vin requirements to generate Iout(max). 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. CONTRACT NO. APPROVALS DRAWN DATE June Wu 12/29/04 Julian Zhu 12/29/04 CHECKED TECHNOLOGY TITLE DESIGNER LTC3221EDC-3.3 / LTC3221EDC-5 / LTC3221EDC Micropower Regulated Charge Pump DC/DC Converter APPROVED ENGINEER 1630 McCarthy Blvd. Milpitas, CA 95035 Phone: (408)432-1900 Fax: (408)434-0507 SIZE CAGE CODE Wednesday, August 02, 2006 SCALE: FILENAME: DWG NO REV A DC862A SHEET 1 OF 1