A B C D E REVISION HISTORY E1 VIN VIN REV DESCRIPTION APPROVED - 2 PRODUCTION FAB JIM N. VOUT C7 47uF 16V C5 + R5 1.0M OPT C8 1uF VCC 12 SW1 SW2 9 13 SW1 SW2 10 14 BST1 BST2 11 C3 0.1uF R3 33K R4 10K C6 680pF VIN VOUT 8 5 VIN COMP 1 FB 2 R6 IOUT 7 OPT OVP 3 15 VCC 16 PWMSYNCH 6 RUN R10 1.0M C12 100pF E3 R2 1M 1% C9 47uF 16V C13 100pF R9 42.2k 1% R1 845k 1% C14 47uF 16V OPT C10 1uF 3 R7 R8 158K 133K 1% 1% E4 GND GND ON 1 2 3 OFF JP1 750kHz OSC SYNCH BURST 1 2 3 1. ALL RESISTORS ARE IN OHMS, 0402. 2. INSTALL SHUNTS AS SHOWN. A IOUT / IADJ 10k 1% 2 JP2 CUSTOMER NOTICE NOTE: UNLESS OTHERWISE SPECIFIED E5 R11 PWM RUN 2 1 4 C1 47pF 4 3 C11 1uF C4 10pF GND C2 0.1uF VOUT 5.0V / 2.5A E2 D1 4.7uH U1 LTC3112EDHD 2.7V - 15.0V DATE 10-07-10 VCC L1 17 4 ECO 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. APPROVALS PCB DES. NC APP ENG. JIM N. TECHNOLOGY 1630 McCarthy Blvd. Milpitas, CA 95035 Phone: (408)432-1900 www.linear.com Fax: (408)434-0507 LTC Confidential-For Customer Use Only TITLE: SCHEMATIC 15V, 2.5A SYNCHRONOUS BUCK-BOOST DC / DC CONVERTER SIZE IC NO. N/A THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS. SCALE = NONE B C DATE: REV. LTC3112EDHD DEMO CIRCUIT 1598A 10-07-10 2 SHEET 1 D 1 E OF 1