1 CIN 4.7uF 6.3V 2 RSD1 1M 3 A L1 VOUT1 300mA E1 4.7uH COUT3 0.1uF GND COUT1 4.7uF 6.3V R1 150K 1% CFFW1 10pF ON OFF 2 LTC3547EDDB 2 Run1 Run2 7 4 SW1 SW2 6 1 Vfb1 RSD2 1M A L2 E2 4.7uH COUT2 4.7uF 6.3V Vfb2 8 5 E3 U1 JP2 3 ON OFF 1 JP1 CFFW2 10pF GND E6 COUT4 0.1uF R2 475K 1% E4 VOUT2 300mA GND 9 CIN2 (OPT) Vin 3 CIN1 47uF 10V GND GND E5 1 VIN 2.5V-5.5V 2 JP3 R3 R6 JP6 1.2V 150K 1% 150K 1% 2.5V JP4 R4 1.5V 100K 1% R7 JP7 JP5 R5 105K 1% 3.3V 1.8V 75K 1% VOUT1 E7 VOUT2 GND B B 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. 1 CONTRACT NO. APPROVALS DRAWN HELEN DATE 10/24/05 CHECKED TECHNOLOGY ENGINEER Tom Gross 10/24/05 DESIGNER Wednesday, May 24, 2006 LTC3547EDDB, Dual TITLE APPROVED 1630 McCarthy Blvd. Milpitas, CA 95035 Phone: (408)432-1900 Fax: (408)434-0507 Monolithic Synchronous Buck Regulator SIZE CAGE CODE SCALE: DWG NO FILENAME: SHEET 2 REV A DC1013A 1 OF 1