1 2 3 4 5 6 7 8 A A U1 LTC3225EDDB VIN E1 C6 0.22uF 2.9-5.5V GND L1 10nH 1 2 Etch Inductor E2 C1 1uF 10V E4 1 GND GND C+ 2 C- 4 SHDN 5 PGOOD E3 R4 100k 5% COUT 10 + VOUT R3 100k 5% PGOOD VIN C2 2.2uF 10V 8 B SHDN VOUT 9 exposed pad, solder side VIN CX 3 + PROG 7 VSEL 6 VIN 4.8V or 5.3V GND C3 OPT B R2 15k JP3 150mA 30mA VIN ICHRG JP2 RUN 5.3V SHDN 4.8V Unless Noted: All Resistors are 0402, 1%, 1/16W All Capacitors are 0603, 6.3V 10% C VOUT SELECT CUSTOMER NOTICE 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. APPROVALS TECHNOLOGY DRAWN: J. Drew TITLE: CHECKED: APPROVED: 3 4 1630 McCarthy Blvd. Milpitas, CA 95035 Phone: (408)432-1900 Fax: (408)434-0507 LTC Confidential-For Customer Use Only SCHEMATIC LTC3225EDDB Low Profile Regulated Dual Cell SuperCAP Charger ENGINEER: J. Drew SIZE DESIGNER: DWG NO. DATE: 5 Wednesday, July 23, 2008 6 B SHEET 1 7 D REV DC1220B A THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS. 2 VOUT E6 R1 60.4k R5 100k 5% 11 JP1 C 1 C5 0.22uF COUT 0.20F HS203F 5.5V GND E7 D E5 C4 OPT 8 OF 1