A B C D E REVISION HISTORY D2 OPT VCC SW2 BST1 BST2 10 VIN 14 PVIN 11 PVCC 9 3 C10 4.7uF 50V 1812 C5 PWM + C12 1uF 50V 1206 OPT 5 8 C9 4.7uF 6.3V 0603 E4 2 C13 0.1uF 0805 16 4 3 FB 7 VCC GND PRODUCTION FAB J.NOON 4 VC RUN C4 33pF R1 1M C8 3300pF C6 47uF 10V 1812 0603 6 1 R3 15k RUN C11 10pF 3 C7 1uF 25V 0603 R2 249k U1 LTC3115EDHD-1 E2 GND VIN 1 2 RUN 3 R5 C3 OPT OPT JP2 1 FIXED FREQ SYNCH BURST MODE 2 UNLESS NOTED: RESISTORS: OHMS, 0402, 1% CAPACITORS: uF, 0402 R6 1M RUN OFF 02-08-12 VOUT 5.0V / 2A GND ON DATE E1 R4 60.4k RT GND 2 VOUT PWM/SYNC R7 47.5k - 12 PVOUT PGND D1 PMEG2010EA VOUT 2.7V - 40V 13 17 VIN VIN APPROVED C2 0.1uF SW1 E3 DESCRIPTION OPT 2 15 10uH C1 0.1uF REV B360A L1 4 ECO PWM 1 2 3 VCC PWM 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. APPROVALS PCB DES. NC APP ENG. J.NOON 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 40V, 2A BUCK BOOST DC / DC CONVERTER SIZE IC NO. N/A JP1 THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS. SCALE = NONE A B C DATE: 1 REV. LTC3115EDHD-1 DEMO CIRCUIT 1687A 02-08-12 2 SHEET 1 D E OF 1