A B C D E REVISION HISTORY D2 L1 4 OPT VCC SW2 D1 PMEG2010EA VOUT 2.7V - 40V 13 BST1 BST2 10 VIN 14 PVIN 11 PVCC 9 3 PWM C10 4.7uF 50V 1812 + C12 1uF 50V 1206 C5 OPT 5 8 C9 4.7uF 6.3V 0603 E4 2 C13 0.1uF 0805 16 4 PVOUT VCC FB GND DATE - 1 PRODUCTION FAB J.NOON 06 - 04 - 13 E1 OPT VOUT 5.0V 2A VIN > 6.0V RUN R1 1M OPT 7 R4 137k R8 0 VC R3 15k C8 3300pF C14 47uF 10V 1812 0603 6 RUN 1 C11 10pF C6 47uF 10V 1812 3 C7 1uF 25V 0603 R2 249k U1 LTC3115EDHD-2 E2 GND GND VIN ON 1 2 RUN 3 OFF R5 C3 OPT OPT JP2 1 FIXED FREQ SYNC BURST MODE 2 UNLESS NOTED: RESISTORS: OHMS, 0402, 1% CAPACITORS: uF, 0402 R6 1M RUN 4 C4 33pF VOUT 3 RT R7 47.5k APPROVED 12 PWM/SYNC GND DESCRIPTION B360A C15 PGND VIN VIN 17 E3 REV C2 0.1uF SW1 C1 0.1uF 2 15 10uH 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 SYNCHRONOUS BUCK BOOST DC / DC CONVERTER SIZE N/A JP1 THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS. SCALE = NONE A B C DATE: IC NO. REV. LTC3115EDHD-2 DEMO CIRCUIT 2119A 06 - 04 - 13 1 SHEET 1 D 1 E OF 1