5 4 3 2 1 OPTIONAL CIRCUIT TAIYO YUDEN VISHAY FB MJ3216HS800 IHLP-2525CZ-01 L2 FB1 10UH BEAD C9 0.01UF 0603 GND EXTSS U1 LT1913EDD 22UF,50V SANYO 50CE22BS D1 MBRA340T3 2 1 C1 0.47UF 1 2 VIN 4 + C2 C3 10UF,35V 1206 22UF,63V E2 SANYO 63CE22BS 5 RT 10 VC 9 BD BOOST VIN E3 R3 590K SYNC 6 R4 100K C8 100PF E4 RUN SHDN EXTSS JP1 1 2 3 4 R2 110K FB 8 PGOOD 7 SW RUN/SS R1 45.3K 11 C + C11 3 VIN E1 6.5V - 25V GND C10 10UF,35V 1206 D GND D VISHAY IHLP-2525CZ-01 L1 6.8UH E5 VOUT C4 47UF,10V 1206 C5 0.1UF 50V 0603 E6 R5 15K E7 C6 1000PF R6 100K E8 C7 0.22UF,50V 0805 E9 VOUT [email protected] C GND PGOOD GND SYNC B B CUSTOMER NOTICE NOTES: UNLESS OTHERWISE SPECIFIED 1. ALL RESISTORS ARE IN OHMS, 0402. ALL CAPACITORS ARE IN MICROFARADS, 0402. A 2. INSTALL SHUNT ON JP1 PINS 1&2. CONTRACT NO. 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. THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS. 5 4 3 APPROVALS DRAWN: TECHNOLOGY KIM T. CHECKED: TITLE: SCHEMATIC SIZE DWG NO. APPROVED: ENGINEER: KEVIN H. DESIGNER: A DATE: 1630 McCarthy Blvd. Milpitas, CA 95035 Phone: (408)432-1900 Fax: (408)434-0507 LTC Confidential-For Customer Use Only A 3.5A, 25V STEP-DOWN SWITCHING REGULATOR WITH SYNC FUNCTION DC1316A - LT1913EDD Monday, December 10, 2007 2 SHEET 1 REV A 1 OF 1