5 4 3 2 1 D D D1 2 L1 1 DFLS240L E1 E2 + C1 22uF 63V C3 0.47uF 1 GND U1 LT1912EDD C RUN EXTSS 2 3 C2 4.7uF 50V R1 100K 4 SHDN EXTSS 50V JP1 E3 R2 1 BD RT 10 2 BOOST VC 9 3 SW FB 8 4 VIN NC 7 5 RUN/SS C4 0.1uF 50V 68.1K 1% R3 20K C5 1000pF C6 100pF R4 110K C R5 590K SYNC 6 11 GND VIN 6.3V - 36V 10uH C7 47uF 10V C8 0.1uF 50V B VOUT E4 5V@2A GND E5 SYNC E6 CUSTOMER NOTICE 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. A 5 4 CONTRACT NO. APPROVALS DRAWN HELEN DATE 8/3/07 CHECKED APPROVED ENGINEER DESIGNER KEVIN H. 8/3/07 TECHNOLOGY TITLE 1630 McCarthy Blvd. Milpitas, CA 95035 Phone: (408)432-1900 Fax: (408)434-0507 LT1912EDD, 2A, 36V, 500KHz STEP-DOWN SWITCHING REGULATOR SIZE CAGE CODE FILENAME: Wednesday, November 07, 2007 SCALE: 3 B 2 DWG NO REV A DC1313A SHEET 1 1 OF 1 A