5 4 3 2 1 REVISION HISTORY L1 ECO 6.8uH D 13 E1 VIN 2.7V - 40V 10 14 LTC3114-1 BST1 BST2 PVOUT VIN PLDO PVIN LDO E2 R3 21k MODE VC 12 D1 3 PROG R5 1M VIN B 1 2 3 ON OFF JP1 FIXED FREQ RUN R6 BURST MODE C12 DNP DATE J.NOON 12 - 13 - 13 C3 4.7uF 6.3V 9 LDO R1 2M 1% VOUT R7 DNP DNP 6 C4 22uF 25V C13 22uF 25V C5 1uF 25V C R2 499K 1% C10 10pF R4 27.4k E4 GND MODE 1 2 3 D 5.0V / 1A C14 7 U1 E3 R8 49.9 1% 11 GND RUN PRODUCTION APPROVED VOUT C9 4700pF PGND C11 10nF 3 C2 68nF 1 5 FB GND 16 MODE RUN 17 C8 1uF 50V GND C C7 OPT 4 RUN 8 C6 10uF 50V + DESCRIPTION 2 15 - SW2 VIN SW1 C1 68nF REV GND LDO B MODE JP2 DNP CUSTOMER NOTICE 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. A THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS. 5 4 TECHNOLOGY NC J.NOON TITLE: SCHEMATIC 40V, 1A SYNCHRONOUS BUCK - BOOST DC / DC CONVERTER WITH PROGRAMMABLE OUTPUT CURRENT SIZE N/A SCALE = NONE 3 1630 McCarthy Blvd. Milpitas, CA 95035 Phone: (408)432-1900 www.linear.com Fax: (408)434-0507 LTC Confidential-For Customer Use Only DATE: IC NO. REV. LTC3114-1EDHC DEMO CIRCUIT 1821A 12 - 13 - 13 3 SHEET 2 1 1 OF 1 A