A B C D E REVISION HISTORY ECO REV - 3.2 R1 100k R29 4 196k 1% PROD. P/L Change DATE APPROVED 03/30/16 i ^ VOUT1 2 -5.0V 3 1% 5 4 -3.3V R30 DESCRIPTION 4 6 USER SEL JP3 OPT INTVCC VOUTR10 200k 1% RTH 511 1% INTVCC R27 OPT 0.1uF 17 18 15 MODE E7 R3 EXT_SYNC 0 E2 VIN FCC 1 2 EXT 3 BURST 5 4 8 C3 OPT 6 11 12 JP1 GND R19 OPT E1 1 R18 1M 1% 0805 EXT I/O 2 RUN ON 1 4 OFF 5 6 JP2 VLOGIC 3 2 EXT I/O 3 E13 4 R2 10M 1% 5 C4 OPT R31 20 1% 9 R32 16 100 1% R13 100k E9 2 10 ISET INTVCC ITH VINREG RT VIN MODE/SYNC VIN RUN SW PGOOD SW PGDFB SW VOUT- SW VOUT- SW VOUT- SW VOUT- SW VOUT- BOOST GND VOUTSNS R25 EXTVCC VOUT- 20 VOUT- 14 7 VIN E3 6 CIN4 1uF 0805 100V 28 27 26 CIN1 2.2uF 100V 1210 + CIN5 OPT CIN2 10uF 63V 1210 10uF 63V 24 VOUT- 22 COILCRAFT XAL5050-562MEB C6 0.1uF 21 E5 19 13 C5 1uF 25V R5 10 1% GND COUT1 22uF 25V 1210 COUT2 22uF 25V 1210 COUT3 + 150uF 16V 7343 E6 VOUT-5V / 4A MAX VOUT- E14 VOUT- CUSTOMER NOTICE 1. ALL CAPACITORS AND RESISTORS ARE 0603. 2. ALL RESISTORS ARE 5%. TECHNOLOGY `\ i^ EXTVCC A B C LTC CONFIDENTIAL - FOR CUSTOMER USE ONLY HIGH VOLTAGE, NEGATIVE OUTPUT MONOLITHIC SYNCHRONOUS REGULATOR N/A SCALE = NONE 1630 McCarthy Blvd. Milpitas, CA 95035 Phone: (408)432-1900www.linear.com Fax: (408)434-0507 TITLE: SCHEMATIC SIZE THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS. 2 E15 R33 OPT 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. NOTES: UNLESS OTHERWISE SPECIFIED, E4 GND L1 5.6uH 23 VOUT- GND 3 25 R26 1M 1% E12 VIN 3.5V - 55V + CIN3 137k 1% PGOOD 1 CVCC 2.2uF 0805 16V R4 0 29 3 U1 LTC7149EFE C1 CTHP 220pF C0G SVOUT- VOUT- CTH 10nF X7R DATE: D IC NO. REV. LTC7149EFE DEMO CIRCUIT 2354A Wednesday, March 30, 2016 3.2 SHEET 1 E OF 1 1