A B C D E 4 4 U1 LTC3025EDC-1 Vin 0.9V - 5.5V GND E1 3 * CIN 1uF 6.3V CIN1 + 10uF 25V E2 VIN 1 BIAS 6 ENABLE OUT 4 E3 GND 2 FB 5 GND BIAS E5 3 7 C1 1uF 6.3V Vout Enable 1 ON 2 OFF 3 JP5 R5 40.2K 1% 0.8V JP1 1.2V JP2 R1 40.2K 1% R2 40.2K 1% 1.5V JP3 1.8V JP4 COUT 1uF 6.3V COUT1 1uF 6.3V (Opt) + COUT2 100uF 10V (Opt) E4 R4 30.1K 1% R3 30.1K 1% E6 Vout 500mA (max) GND GND 3 PCB Layout R6 10M R5 C1 R1 2 2 U1 * CIN1 is an optional capacitor. It is inserted on the DC1283A to dampen the (possible) ringing voltage due to the use of long input leads. On a normal, typical PCB, with short traces, CIN1 is not needed. 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. 1 A B CIN CONTRACT NO. APPROVALS DRAWN DATE AntoninaK 5/17/07 Tom Gross 5/17/07 CHECKED APPROVED ENGINEER DESIGNER Tuesday, July 31, 2007 C TECHNOLOGY TITLE COUT 1630 McCarthy Blvd. Milpitas, CA 95035 Phone: (408)432-1900 Fax: (408)434-0507 LTC3025EDC-1 VLDO Linear Regulator SIZE CAGE CODE SCALE: FILENAME: D DWG NO 1 REV DC1283A SHEET A 1 E OF 1