1 2 REVISION HISTORY ECO REV 1 1 DESCRIPTION DATE REBUILD WITH CHANGE 09/29/09 APPROVED K.Szolusha VOUT JP1 R1 OPT 0402 3 E1 + C1 10uF 50V VIN N/C VSW 5 BIAS 7 FB 8 GND GND E2 U1 LT3470ETS8 A 0603 1206 X7R 2 C5 OPT 6.3V C2 1uF 50V 1206 E9 C4 22uF X5R TOKO D52LC 6 3 BOOST VIN 7V TO 40V SHUTDOWN 5V@200mA L1 33uH C6 22pF NPO 0402 R3 200k 1% 0402 R2 604k 1% 0402 4 1 1 VOUT ENABLE 0.22uF X5R 0402 SHDN A 2 C3 B B CUSTOMER NOTICE 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. APPROVALS THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS. 1 TECHNOLOGY PCB DES. MIKEI ENG. KEITHS 1630 McCarthy Blvd. Milpitas, CA 95035 Phone: (408)432-1900 Fax: (408)434-0507 LTC Confidential-For Customer Use Only TITLE: SCHEMATIC 40V MICROPOWER SOT23 BUCK REGULATOR WITH INTEGRATED BOOST AND CATCH DIODES SIZE A DATE: IC NO. REV LT3470ETS8 DEMO CIRCUIT 716B Tuesday, September 29, 2009 2 1 SHEET 1 OF 1