A B C D E REVISION HISTORY JP1 R1 0.8V 16.2K 1% R2 1.2V JP3 24.3K 1% R3 1.8V JP5 35.7K 1% R4 JP2 4 INT (OPT) C5 0.01uF 2 3 1 4 R6 56K C2 (OPT) C1 68pF ISET PGOOD ITH VOUT 12 RT INTVCC PGOOD INTVCC R8 (OPT) BOOST E2 INTVCC C3 4.7uF 9 VIN E3 5 6 R9 36.5K 1% PGFB 0 Ohm 0805 10 RUN VIN MODE/SYNC SW 8 VIN 4.5V - 15V 7 CIN2 22uF 16V 1210 C4 0.1uF GND L1 2.2uH IHLP-2020CZ-ER-2R2M01 VISHAY * E5 (OPT) COUT2 (OPT) 1210 C6 (OPT) 0805 E6 COUT3 (OPT) 1210 2 NOTES: VIN ON 1 3 JP9 RSD 1M INTVCC MODE/SYNC 1 2 CCM 3 4 DCM 6 SYNC 5 E7 VOUT 1 NOTE: UNLESS OTHERWISE SPECIFIED. 0.8V 1.2V 1.8V 3.3V R10 30.1k 1% 30.1k 1% 30.1k 1% 30.1k 1% OPT R11 90.9k 1% 30.1k 1% 15.0k 1% 6.81k 1% OPT 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. DEFAULT APPROVALS PCB DES. APP ENG. TECHNOLOGY RB THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS. B C 1630 McCarthy Blvd. Milpitas, CA 95035 Phone: (408)432-1900www.linear.com Fax: (408)434-0507 LTC CONFIDENTIAL - FOR CUSTOMER USE ONLY TITLE: SCHEMATIC JEFF Z. 4.5-15VIN, 1.5A MONOLITHIC BUCK REGULATOR SIZE 1. ALL RESISTORS 0402. 2. ALL CAPACITORS 0402. A * CUSTOMER NOTICE JP10 SYNC 2 1. PGOOD FUNCTION REQUIRES R10 AND R11 BEING STUFFED ACCORDING TO THE FOLLOWING TABLE. 2 OFF VOUT 0.8V - 3.3V @1.5A GND R11 (OPT) RUN E4 VOUT COUT1 47uF 6.3V 1210 VOUT R10 * 3 GND 2 JP8 CIN1 + 3.3uF 35V (OPT) CIN3 22uF 16V (OPT) 13 PGOOD 1 3 04/06/11 R12 11 INTVCC EN JEFF Z. R7 100K INTVCC JP7 DIS 02/24/11 E1 1 3 3 LTC3600EDD(UPDATE PIN NAMES: 1, 2 & 6) VALUE CHANGE: R9 from 39k to 36.5k. DATE JEFF Z. INTVCC 2 EXT APPROVED DESCRIPTION PRODUCTION U1 LTC3600EDD INTVCC COMP 2 4 R5 USER SELECT REV - 3 66.5K 1% 3.3V JP6 ECO N/A SCALE = NONE DATE: D IC NO. REV. LTC3600EDD DEMO CIRCUIT 1667A Friday, November 18, 2011 3 SHEET 1 E OF 1 1