5 4 3 2 1 U1 LT3013EDE CT CT 1000PF,50V VOUT 250mA MAX. D GND 6 5V 3.3V R3 294K E4 E5 JP2 VOLTAGE SELECT C SHDN GND 5 PG 6 COUT 4.7UF,10V 0805 5 NC R2 499K 3 ON 7 VOUT 3 FB/ADJ 4 VIN 4 9 8 OFF 2 JP1 VOUT ENABLE 10 B R1 100K E3 VOUT 3 CIN 2.2UF,100V 1812 VIN 2 * 10UF,100V SANYO 100CV10BS NC 1 VOUT 2 NC A +CINA E2 11 1 VIN GND GND 12 E1 1 ** VIN 3V-80V 13 D R4 162K USER SELECT R5 TBD GND RPG 499K C C E6 PGOOD NOTES: UNLESS OTHERWISE SPECIFIED 1. ALL RESISTORS ARE IN OHMS, 0402. 2. INSTALL SHUNTS ON JP1 PIN 2 AND 3, AND JP2 PIN 1 AND 2. B B IS AN OPTIONAL PART. IT IS INSERTED ON THE DC813A TO DAMPEN THE (POSSIBLE) RINGING VOLTAGE DUE TO * CINA THE INDUCTANCE OF LONG INPUT CABLES. ON NORMAL, TYPICAL PCBS, WITH SHORT TRACES, CINA IS NOT NEEDED. IS THE MINIMUM INPUT VOLTAGE THAT THE LT3013 WILL OPERATE AT. THE MINIMUM INPUT VOLTAGE FOR ** 3V A SPECIFIC REGULATOR CIRCUIT DEPENDS ON THE OUTPUT VOLTAGE (PLUS THE DROPOUT VOLTAGE). 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 CIRUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT PERFORMANCE OR RELIABILITY. CONTACT LINEAR TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE. A THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS. 5 4 3 APPROVALS DRAWN: TECHNOLOGY KIM T. 1630 McCarthy Blvd. Milpitas, CA 95035 Phone: (408)432-1900 Fax: (408)434-0507 LTC Confidential-For Customer Use Only CHECKED: TITLE: SCHEMATIC APPROVED: HIGH VOLTAGE MICROPOWER VOLTAGE REGULATOR ENGINEER: TOM G. DESIGNER: SIZE A DATE: DWG NO. A DC813A * LT3013EDE Monday, September 19, 2005 2 SHEET 1 1 REV A OF 1