A B C D E REVISION HISTORY ECO R3 1% R28 1 2 5.0V 3 4 3.3V CVCC 2.2uF 0805 INTVCC OPT OPT RTH 1k 1% CTH 4.7nF NPO CTHP 10pF NPO 17 18 R10 IMON EXT_SYNC E2 CIMON 470pF MODE EXT I/O E12 9 2 FCC 10 3 4 EXT C3 8 5 6 BURST OPT R19 R18 1M 1% 0805 ON 1 OPT EXT I/O 3 INTVCC 11 VOUT JP1 R25 1M 1% RUN 12 1 2 3 4 2 4 OFF 5 GND 1% 16 1 VIN E1 R17 100 VOUT GND 2 15 200k 1% 13 R14 0 i ^ R2 10M 1% 6 JP2 C4 OPT R5 10k U1 LTC3649EFE#PBF-ES ISET INTVCC ITH VINREG RT VIN IMON VIN VOUT SW SGND SW MODE/SYNC SW RUN SW PGOOD SW PGDFB SW GND SW GND BOOST GND EXTVCC GND R26 137k 1% SGND R1 GND R21 OPT 20 14 R22 OPT 0805 7 6 C7 1uF 0603\0805 100V 28 27 26 CIN1 10uF 63V 1210 VIN CIN4 1uF 0805 100V CIN2 10uF 63V 1210 E3 VIN 60V MAX + CIN5 + CIN3 OPT 3 10uF 63V E4 GND 25 L1 5.6uH 24 23 22 C6 0.1uF 21 19 VOUT COILCRAFT XAL5050-562MEB COUT1 22uF 10V 1206 VOUT 5 COUT2 22uF 10V 1206 E5 VOUT COUT3 5V AT 4.0A + 150uF E6 GND C5 1uF R27 10 29 R29 E8 E7 APPROVED 4 C1 0.01uF R30 OPT RIMON 10.0k 1% DATE 11/13/15 INTVCC 6 USER SELECT JP3 R31 OPT PROD VOUT 1% 5 196k 3 DESCRIPTION 3 100k 4 REV E10 2 EXTVCC R13 100k E9 PGOOD 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 APPLICATION. COMPONENT SUBSTITUTION AND PRINTED APP ENG. CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT PERFORMANCE OR RELIABILITY. CONTACT LINEAR TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE. 1 NOTES: UNLESS OTHERWISE SPECIFIED, i ^ 1. ALL CAPACITORS AND RESISTORS ARE 0603. 2. ALL RESISTORS ARE 5%. THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS. A B C TECHNOLOGY `\ SCALE = NONE 1630 McCarthy Blvd. Milpitas, CA 95035 Phone: (408)432-1900www.linear.com Fax: (408)434-0507 LTC CONFIDENTIAL - FOR CUSTOMER USE ONLY TITLE: SCHEMATIC HIGH VOLTAGE, MONOLITHIC SYNCHRONOUS BUCK REGULATOR SIZE IC NO. LTC3649EFE#PBF-ES N/A DEMO CIRCUIT 2113A DATE: D Tuesday, February 09, 2016 SHEET 1 E REV. 3 OF 1 1