A B C D E REVISION HISTORY ECO REV __ DESCRIPTION 1 APPROVED PRODUCTION TOM G. DATE 3-29-13 4 4 R11 0 Ohm 0805 E2 JP1 RUN1 ON OFF RF 100 1 2 3 BURST MODE PULSE-SKIP RPG1 100k GND E11 5 PVIN2 1 SVIN 4 SGND SGND SW2 R3 210k 1% 1 3 5 7 E5 6 E8 Vishay IHLP1616BZER4R7M11 COUT2 10uF 6.3V 2 4 6 8 CFFW2 22pF R2 887k 1% R8 121k 1% R9 OPT. R10 OPT. E12 THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS. B 3 C TECHNOLOGY HZ TOM G. GND GND 2 2 4 6 8 2.5V 3.3V 5V USER SELECT 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 600mA MONOLITHIC, SYNCHRONOUS STEP-DOWN REGULATOR SIZE IC NO. N/A SCALE = NONE VOUT2 600mA JP5 VFB2 1 3 5 7 APPROVALS LINEAR TOM G.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. [*] CIN3 AND CIN4 ARE INSERTED ON DC1596A TO DAMPEN THE (POSSIBLE) RINGING VOLTAGE DUETO THE USE OF LONG INPUT LEADS. ON A NORMAL, TYPICAL PCB, WITH SHORT TRACES, CIN3 AND CIN4 ARE NOT NEEDED. PGOOD2 COUT4 0.1uF 16V R4 280k 1% R7 105k 1% 1 COUT6 47uF 6.3V OPT. E10 U1 LTC3607EMSE R6 196k 1% CUSTOMER NOTICE A 9 R5 140k 1% JP4 VFB1 2 1.2V 1.5V 1.8V USER SELECT PVIN1 SW1 8 10 R1 210k 1% Vishay IHLP1616BZER2R2M11 * PVIN2 4.5V - 15V + CIN4 22uF 35V RPG2 100k GND COUT1 10uF 6.3V + CIN6 47uF 20V OPT. OFF PGOOD1 13 GND E9 CFFW1 22pF CIN2 10uF 16V L2 4.7uH 3 COUT5 47uF 6.3V OPT. ON L1 2.2uH E7 COUT3 0.1uF 16V PGOOD2 17 VOUT1 600mA RUN1 16 E4 CIN2BYP 0.1uF 16V 5.1M RSD2 MODE/SYNC PGND1 PGOOD1 15 2 3 JP3 MODE/SYNC 1 2 3 4 5 6 VFB1 SYNC EXT SYNC 1 2 3 CF 0.1uF 14 RSD1 5.1M E6 JP2 RUN2 11 CIN1BYP 0.1uF 16V RUN2 CIN1 10uF 16V VFB2 E3 + CIN5 47uF 20V OPT. 12 * + CIN3 22uF 35V PGND2 GND E1 7 PVIN1 4.5V - 15V REV. LTC3607EMSE DEMO CIRCUIT 1847A 1 Thursday, August 08, 2013 DATE: D SHEET 1 E OF 1 1