5 4 3 U1 LTC3560ES6 GND 4 * E2 +CIN1 CIN 10UF 6.3V 0805 22UF 10V 3528 6 1 SYNC/MODE RUN JP2 MODE C PULSE-SKIP BURST JP1 VOUT ENABLE ON OFF SYNC B E6 RBM 1.0M COUT 10UF 6.3V 0805 COUT1 0.1UF 0805 JP3 RFB2 806K RFB1 806K 1.2V 1% 1% JP4 RFB3 536K 1.5V 1% JP5 RFB4 402K 1.8V 1% JP6 RFB5 OPT E5 GND CFFW 10PF C SYNC CIN1 IS AN OPTIONAL CAPACITOR. IT IS INSERTED ON THE DC1025A TO DAMPEN THE (POSSIBLE) RINGING VOLTAGE DUE TO THE LONG INPUT LEADS. ON A NORMAL, TYPICAL PCB, WITH SHORT TRACES, THE CAPACITOR IS NOT NEEDED. 5 TDK VLF3010AT-1R5N1R2 E3 VOUT 800mA MAX. E4 GND RSD 1.0M 1. ALL RESISTORS ARE IN OHMS, 0402. ALL CAPACITORS ARE 0402. 2. INSTALL SHUNT ON JP1, JP2, & JP5 PINS 1 AND 2. * VOUT USER SELECT B NOTES: UNLESS OTHERWISE SPECIFIED A D FB 5 E7 1 L1 1.5UH SW 3 VIN 2 GND VIN GND D VIN E1 2.5V - 5.5V 2 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. THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS. 4 3 APPROVALS DRAWN: CHECKED: APPROVED: ENGINEER: TOM G. DESIGNER: TECHNOLOGY KIM T. 1630 McCarthy Blvd. Milpitas, CA 95035 Phone: (408)432-1900 Fax: (408)434-0507 LTC Confidential-For Customer Use Only TITLE: SCHEMATIC A 800mA MONOLITHIC SYNCHRONOUS BUCK REGULATOR SIZE DWG NO. A DC1025A-1 * LTC3560ES6 Friday, December 22, 2006 DATE: 2 SHEET 1 REV A-1 1 OF 1