5 4 3 2 1 INTVCC U1 RPG1 100k 1% LTC3622EDE E1 D VIN1 2.7V - 17V 1 CIN1 22uF 35V 7343 C5 10uF 25V 1206 + SW1 1 13 2 E8 E12 7 CIN2 22uF 35V 7343 + 14 VOUT1 RUN1 RSET1 619k 1% VIN2 FB1 SYNC SYNC INTVCC BURST PULSE-SKIP 180 INTVCC 0 2 OFF 3 9 RUN2 1 2 3 4 5 6 JP6 1.2V VOUT1 SELECT MODE/SYNC 3 500mA INTVCC 500mA CHAN 2 ONLY 1A 2 3 4 4 3 4 5 6 JP9 3.3V R5 OPT JP10 USER SELECT E6 PHASE PGOOD2 SW2 2 JP8 2.5V R4 137k 1% RPG2 100k 1% ILIM 1 JP7 1.8V R3 196k 1% INTVCC PHASE 1 R2 309k 1% C 6 FB2 L2 4.7uH 8 VOUT2 1A C4 OPT E10 B GND R11 412k 1% R12 309k 1% R13 137k 1% R14 84.5K 1% JP11 1.5V JP12 1.8V JP13 3.3V JP14 5V R15 OPT 15 INTVCC 10 C2 47uF 1206 CFF2 22pF RSET2 619k 1% GND 11 C7 1uF PGOOD2 E7 ILIM JP5 INTVCC 5 R8 0 E3 3.6V E9 MODE/SYNC JP4 INTVCC CFF1 22pF GND R1 619k 1% JP3 B 1A C3 OPT 12 JP2 E2 C1 47uF 1206 1 ON D E5 L1 3.3uH R7 0 RUN2 C6 10uF 25V 1206 GND C PGOOD1 JP1 E11 VIN2 2.7V - 17V E4 2 3 OFF R6 0 0805 PGOOD1 RUN1 ON GND VIN1 VOUT2 SELECT CUSTOMER NOTICE JP15 USER SELECT 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 APP ENG. 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 DUAL WIDE VIN SYNCHRONOUS BUCK REGULATOR WITH ULTRA-LOW QUIESCENT CURRENT SCALE = NONE SIZE IC NO. N/A PCB NO. DATE: 2 LTC3622EDE DEMO CIRCUIT 2003A SHEET 1 Thursday, May 15, 2014 1 REV. 2 OF 1 A