A B C D E REVISION HISTORY ECO REV DESCRIPTION - 2 PRODUCTION FAB APPROVED JIM N. L1 4 2.2uH 7 3 C7 47uF 10V + C6 OPT C5 1uF R4 1M 8 15 16 SW2 SW2 1 VOUT 2 RUN FB R3 6.49K RT VC C2 100uF 6.3V C8 680pF R5 49.9K 9 R7 182K 1% C9 10pF C4 100uF 6.3V OPT C3 1uF C10 100uF 6.3V OPT 3 OPTIONAL FOR PULSED LOAD APPLICATIONS GND GND 4 R2 825k 1% 10 BURST R1 90.9k 1% E4 VOUT1 PGND 11 VIN VIN VIN 17 3 4 5 SGND VIN 6 E3 VIN 1.8V - 5.5V SW1 SW1 SW1 LTC3113EDHD C1 47pF 11-02-10 VOUT 3.3V / 3A E1 VOUT 12 13 14 U1 DATE E2 GND PWM 2 ON 1 2 3 OFF JP2 R6 1 2 3 BURST MODE FIXED FREQ 1 1. ALL RESISTORS ARE IN OHMS, 0402. 2. INSTALL SHUNTS AS SHOWN. A 2 1.0M JP1 CUSTOMER NOTICE NOTE: UNLESS OTHERWISE SPECIFIED VIN APPROVALS LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS; HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO PCB DES. VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL APP ENG. 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. B TECHNOLOGY NC JIM N. 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 3A LOW NOISE BUCK - BOOST DC / DC CONVERTER SIZE IC NO. N/A SCALE = NONE C DATE: REV. LTC3113EDHD DEMO CIRCUIT 1551A 11-02-10 2 SHEET D 1 E 1 OF 1