5 4 3 2 1 E1 E13 OV/UV 14 D3 (Opt) SOD-123 13 L3 C6 1µF 50V 1206 15µH 744025150 R9 100k 4 17 8 R11 (Opt) E11 L2 10µH 74437324100 1 18 VIN2 FB2 OV/UV 16 2 *See Demo Manual C12 (Opt) 1210 E7 R4 316k 1% C9 47µF 10V 1210 C22 (Opt) 0603 C17 47µF 10V 1210 C18 (Opt) 1210 C19 (Opt) 1210 VOUT2 - 5V -800mA * E8 GND R5 59.0k 1% E3 L1 6.8µH 74437324068 D1 DFLS240L-7 PG1 R2 316k 1% C10 47µF 10V 1210 C21 (Opt) 0603 C14 47µF 10V 1210 C15 (Opt) 1210 FB1 SS1 15 E12 VOUT1 +5V 1.4A * C16 (Opt) 1210 E6 PG2 C7 0.1µF 0603 SS1 B 19 C11 (Opt) 1210 D2 VS-10MQ060NTRPBF C3 SS2 R12 (Opt) U1 LT8471EFE E1 E5 PG2 E2 R7 (Opt) E4 PG1 C4 2.2µF 50V 1206 C 6 R8 100k SHOUT SYNC R6 499k 1% VIN1 C5 2.2µF 50V 1206 2.2µF 50V 1206 C2 0.47µF 50V 1206 3 C1 0.47µF 50V 1206 20 GND C D C3 C20 (Opt) 1206 C2 E2 C13 47µF 35V C1 + GND 5 R3 59.0k 1% 7 RT 10 11 GND 12 GND 21 GND GND VIN 6V to 32V 9 D E10 SGND B SS2 C8 0.1µF 0603 E9 SYNC R10 0 Ohm R1 187k 1% 450kHz CUSTOMER NOTICE A NOTE: UNLESS OTHERWISE SPECIFIED. ALL RESISTORS 0603. 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 APP ENG. 5 4 3 LTC CONFIDENTIAL - FOR CUSTOMER USE ONLY TITLE: SCHEMATIC SIZE C:\PADS PROJECTS\1854A(LT8471)\SCH\1854A_REV2.DSN THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS. TECHNOLOGY PCB DES. IC NO. N/A SCALE = NONE 1630 McCarthy Blvd. Milpitas, CA 95035 www.linear.com Phone: (408)432-1900 Fax: (408)434-0507 DUAL OUTPUT BUCK AND INVERTING CONVERTER LT8471EFE REV. DC1854A MODIFY DATE: Feb 18, 2014 2 SHEET 1 2 1 OF 1 A