A B C D E REVISION HISTORY ECO REV __ DESCRIPTION 2 APPROVED PRODUCTION TOM G. DATE 3-15-13 4 4 R11 0 Ohm 0805 E2 JP1 RUN1 ON OFF JP2 RUN2 RF 100 1 2 3 1 2 3 BURST MODE PULSE-SKIP 2 E4 RPG1 100k GND E11 JP4 VFB1 2 1.2V 1.5V 1.8V USER SELECT 1 3 5 7 2 4 6 8 7 PVIN2 3 SVIN PVIN1 PGOOD1 E5 LTC3607EUD SGND SGND SW2 8 E8 Vishay IHLP-1616BZER4R7M11 COUT2 10uF 6.3V CFFW2 22pF R2 887k 1% COUT6 47uF 6.3V OPT 3 R4 280k 1% R5 140k 1% R6 196k 1% R7 105k 1% R8 121k 1% VOUT2 600mA COUT4 0.1uF 16V E10 R3 210k 1% R9 OPT E12 GND GND JP5 VFB2 1 3 5 7 2 2 4 6 8 2.5V 3.3V 5V USER SELECT R10 OPT 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 APP ENG. APPLICATION. COMPONENT SUBSTITUTION AND PRINTED CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT PERFORMANCE OR RELIABILITY. CONTACT LINEAR TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE. 1 [*] 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. A PGOOD2 RPG2 100k SW1 10 12 R1 210k 1% Vishay IHLP-1616BZER2R2M11 GND COUT1 10uF 6.3V OFF U1 15 GND E9 CFFW1 22pF * PVIN2 4.5V - 15V + CIN4 22uF 35V L2 4.7uH 5 COUT5 47uF 6.3V OPT + CIN6 47uF 20V OPT 11 L1 2.2uH E7 COUT3 0.1uF 16V PGOOD2 17 VOUT1 600mA ON CIN2 10uF 16V RSD2 5.1M MODE/SYNC PGND1 PGOOD1 1 4 3 RUN1 E6 JP3 MODE/SYNC 1 2 3 4 5 6 VFB1 SYNC EXT SYNC 6 CF 0.1uF 16 RSD1 5.1M CIN2BYP 0.1uF 16V 13 CIN1BYP 0.1uF 16V RUN2 CIN1 10uF 16V VFB2 E3 + CIN5 47uF 20V OPT 14 * + CIN3 22uF 35V PGND2 GND E1 9 PVIN1 4.5V - 15V THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS. B C TECHNOLOGY HZ TG TITLE: SCHEMATIC DUAL 600mA MONOLITHIC, SYNCHRONOUS STEP-DOWN REGULATOR SIZE IC NO. N/A SCALE = NONE 1630 McCarthy Blvd. Milpitas, CA 95035 Phone: (408)432-1900 www.linear.com Fax: (408)434-0507 LTC Confidential-For Customer Use Only REV. LTC3607EUD DEMO CIRCUIT 1596A 2 Monday, May 13, 2013 DATE: D SHEET 1 E OF 1 1