5 ON D 4 3 2 1 JP1 VOUT OFF R5 1.0M D U1 VIN VIN E1 2.7V-5.5V +C7 47uF,10V 3528 C GND 4 +C5 0.22uF 0603 E2 R1 R8 C1 2.2uF 6.3V 0603 R7 * * * C2 2.2uF 6.3V 0603 SHDN 7 VIN VOUT 2 3 C1+ C2+ 1 10 C1- C2- 8 6 R2 100K 1% MODE 3 5 * JP2 VSEL 9 VIN C3 2.2uF 6.3V 0603 R3 C4 4.7uF 16V 0805 R6 * * * * C6 4.7uF 6.3V 0603 * E4 C8 VSEL/FB 5 VOUT GND C R4 11 2 4 5V 6 4.5V FOR BOARD ASSEMBLY B B * U1 JP2 C8 R1 R3 R4 R6 DC863A-A LTC3203BEDD OPT 4.7PF 267K 280K 105K 0 DC863A-B LTC3203EDD-1 INSTALLED OPT OPT OPT 3.32M OPT 402K 357K 4.5V OR 5V@500mA BURST MODE DC863A-C LTC3203BEDD-1 INSTALLED OPT OPT OPT 3.32M OPT 402K 357K 4.5V OR 5V@500mA CUSTOMER NOTICE NOTES: UNLESS OTHERWISE SPECIFIED 1. ALL RESISTORS ARE IN OHMS, 0402. 2. INSTALL SHUNT ON JP1(1&2), JP2 (1&3, 2&4). 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. 4 R7 R8 OPT VOUT 3.3V@500mA CONTRACT NO. THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS. 5 E3 GND GND 1 A * 3 APPROVALS DRAWN: CHECKED: APPROVED: ENGINEER: JULIAN Z. 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 500mA LOW NOISE, HIGH EFFICIENCY CHARGE PUMP SIZE DWG NO. A DATE: DC863A-LTC3203 Wednesday, June 28, 2006 2 SHEET 1 1 REV A OF 1