5 4 3 2 1 SHOULD BE PLACED BETWEEN VIN1 AND GND1. C12 ** C2 SHOULD BE PLACED BETWEEN VIN2 AND GND2. THESE CAPACITORS MUST BE PLACED AS CLOSE AS POSSIBLE TO LT8614. EN/UV SYNC E1 R1 100K E2 + C1 22uF 63V R6 OPT C11 10uF 50V 1206 SUNCON 63CE22BS C2 1uF 50V 13 C12 1uF 50V ** 14 E6 JP1 E5 SYNC GND C 17 1 2 3 2 16 C7 1uF 25V GND ** 15 R2 18.2K (2MHz) E9 TR/SS E7 C8 0.1uF L2 0.22uH VEMI VEMI E10 C14 0.1uF 50V 0402 C3 4.7uF 50V 1206 VIN2 BST 3 L1 C4 1.5uH 0.1uF 16V IHLP2020CZER1R5M01 VOUT 8 SW 9 SW 21 SW 22 SW EN/UV SYNC BIAS RT PG FB C6 47uF 10V 1210 R7 1 VOUT 5V / 4A R4 20 R5 243k C5 GND E4 R3 19 * C9 4.7uF C 100k 1Meg 4.7pF PG B VIN IHLP1616ABERR22M01 C10 10uF 50V 1210 LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS; TECHNOLOGY HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL APPLICATION. COMPONENT SUBSTITUTION AND PRINTED TITLE: SCHEMATIC CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT PERFORMANCE OR RELIABILITY. CONTACT LINEAR TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE. NOTES: UNLESS OTHERWISE SPECIFIED 1. ALL RESISTORS ARE 0603. ALL CAPACITORS ARE 0603. SIZE THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS. 5 C13 1uF 0 CUSTOMER NOTICE A SEE DEMO MANUAL E3 INTVCC TR/SS * E8 FB1 MPZ2012S300A B D VIN1 GND GND 4 VIN 18 VIN 5.8V - 42V 6 7 GND1 10 GND1 11 GND2 GND2 D U1 LT8614EUDC 4 3 N/A DATE: 1630 McCarthy Blvd. Milpitas, CA 95035 Phone: (408)432-1900 www.linear.com Fax: (408)434-0507 LTC Confidential-For Customer Use Only A 42V, 4A MICROPOWER SYNCHRONOUS STEP-DOWN SILENT SWITCHER IC NO. REV. LT8614EUDC 3 DEMO CIRCUIT 2019B Thursday, April 23, 2015 2 SHEET 1 1 OF 1