REVISION HISTORY ECO REV __ VOUT 5V/500mA DESCRIPTION REBUILD WITH CHANGES 1 DATE MOLLY Z. 06-18-10 L1 10uH VOUT E1 C1 10uF 10V 0805 GND E2 CDRH4D22/HP-100 U1 LT3502AEDC VIN VIN 7V - 40V 1 VIN SW BD BOOST 8 E3 VOUT + C4 10uF 50V opt. APPROVED C3 1uF 50V 2 3 C5 22pF R1 52.3K 4 FB SHDN GND EXPOSED PAD GND DA GND C2 0.1uF 16V 7 D1 MBR0540T1 6 5 9 E4 R2 10.0K VIN R3 1 JP1 RUN/SS ON 2 22K OFF C6 opt. 3 CUSTOMER NOTICE E5 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. TECHNOLOGY JW MOLLY Z. TITLE: SCHEMATIC 40V, 500mA, 2.2MHz BUCK REGULATOR IN 2x2 DFN SIZE THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS. 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 DATE: IC NO. REV. LT3502AEDC DEMO CIRCUIT 1089B 06-18-10 1 SHEET 1 OF 1