5 4 VIN 5.5V - 65V GND FB1 E1 C11 0.1uF 100V E2 EN/UV SYNC C12 0.1uF 100V C3 4.7uF 100V 1210 L2 4.7uH C10 4.7uF 100V 1210 + C1 10uF 100V SUNCON 100CE10BS C2 2.2uF 100V 1206 C13 0.1uF 100V 0402 U1 LT8620EMSE R1 1M 5 R6 OPT 1 3 2 1 SYNC GND 13 JP1 GND 6 4 C 1 D E6 E5 2 2 C7 1uF 0402 6.3V 3 R2 18.2k (2MHz) E9 7 8 E7 BST 12 C4 0.1uF 16V 0402 VIN EN/UV SW SYNC SW INTVCC SW TR/SS BIAS RT PG NC FB GND 9 L1 2.2uH C8 0.1uF VOUT 10 C6 47uF 10V 1210 11 VOUT 5V / 2A E3 XFL4020-222MEC C9 1uF 16V 0805 C GND E4 14 R3 15 R4 16 R5 243k 49.9k 1Meg C5 17 TR/SS VIN GND D 3 10pF PG E8 B B NOTES: UNLESS OTHERWISE SPECIFIED 1. ALL RESISTORS ARE 0603. ALL CAPACITORS ARE 0603. 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. A THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS. 5 4 3 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 A 65V, 2A MICROPOWER SYNCHRONOUS MONOLITHIC STEP-DOWN REGULATOR SIZE N/A DATE: 2 IC NO. REV. LT8620EMSE DEMO CIRCUIT 1992A 2 SHEET Wednesday, April 02, 2014 1 1 OF 1