5 4 3 2 1 REVISION HISTORY ECO REV __ DESCRIPTION APPROVED DATE MOLLY Z. 03-14-13 PRODUCTION 1 D D BOOST 15 13 SUNCON 100CE100KXT 2 PG OUT EN FB SS SYNC 8 NC C6 10nF C 5 6 7 C2 0.47uF 0603 4 VOUT D1 PDS360 2 3 SW SW SW NC C7 2.2uF 100V 1210 VIN VIN VIN GND E4 C3 2.2uF 100V 1210 C12 0.1uF 100V 0603 R1 1.00M 1% C1 47uF 10V 1210 C5 10pF C8 47uF 10V 1210 C11 E1 1uF 10V 0603 E2 3 VOUT 3.3V / 3A GND 1 16 R2 576k 1% 14 RT R5 182k 1% (300kHz) 9 + C4 100uF 100V GND 10 11 12 VIN E3 17 VIN 4.3V - 60V L1 8.2uH 1 U1 LT3995EMSE E7 3 2 1 SYNC C JP2 SYNC RT FREQ R6 200K PG E6 EN/UVLO E5 JP1 ON B OFF 1 2 3 L3 3.3uH IND-IHLP2020BZ-01 L2 1.0uH IND-IHLP1616BZ-01 R7 OPT 0603 VIN VEMI B E8 R8 OPT 0603 C9 2.2uF 100V 1210 C10 2.2uF 100V 1210 + C13 33uF 63V 63HVP33 GND E9 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 NOTE: UNLESS OTHERWISE SPECIFIED PCB DES. JUNE W. APP ENG. MOLLY Z. TECHNOLOGY THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS. 4 3 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 60V, 3A, MICROPOWER BUCK REGULATOR SIZE 1. ALL RESISTORS ARE IN OHMS, 0402. ALL CAPACITORS ARE IN MICROFARADS, 0402. 5 APPROVALS IC NO. N/A SCALE = NONE DATE: REV. LT3995EMSE DEMO CIRCUIT 1832A 1 Monday, April 01, 2013 2 SHEET 1 1 OF 1