2 3 4 5 6 NOTE: UNLESS OTHERWISE SPECIFIED ECO 1. ALL RESISTORS ARE IN OHMS 0402 ALL CAPACITORS ARE IN MICROFARADS 0402 E2 CIN1 1uF 25V 0805 VIN1 VIN2 RSD1 1M RSD2 1M 1 2 3 GND OFF VOUT2 3 VOUT2 6 CBYP2 0.01uF GND E5 COUT2 10uF 6.3V 0805 JP4 VOUT2 SELECT BYP2 8 R1F OPT R2A 54.9K ADJ2 NC ADJ1 GND R2B 113K R2C 249K R2D 402K R2E 732K R2F OPT 9 C R2 237K 1% 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 4 VOUT2 500mA + COUT2A (OPT) 7343 1 3 5 7 9 11 BYP1 2 2 + CIN2A** 10uF 25V (Opt.) 7343 E7 B 2 4 6 8 10 12 VOUT1 PCB DES. ENG. TECHNOLOGY K.L. M. ZHU D DUAL 500mA LDO REGULATOR SIZE IC NO. LT3029EDE REV 1 DEMO CIRCUIT 1408A Friday, February 12, 2010 DATE: 5 1630 McCarthy Blvd. Milpitas, CA 95035 Phone: (408)432-1900 Fax: (408)434-0507 LTC Confidential-For Customer Use Only TITLE: SCHEMATIC N/A THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS. 1 CIN2 1uF 25V 0805 A VIN2* 2.3V - 20V 11 12 7 16 ** CIN1A AND CIN2A ARE OPTIONAL, FOR VIN DAMPING PURPOSE ONLY E8 VIN2 VOUT2 R1 237K 1% D 02-12-10 E6 C * SEE QUICK START GUIDE. VIN2 VOUT1 GND R1E 732K 13 4 1 R1D 402K DATE M. ZHU 17 R1C 249K 10 GND R1B 113K SHDN2 5 R1A 54.9K SHDN1 3 JP3 VOUT1 SELECT E4 15 CBYP1 0.01uF 2 4 6 8 10 12 GND COUT1 10uF 6.3V 0805 VOUT1 VIN1 14 1.5V 1.8V 2.5V 3.3V 5V OPT. + COUT1A (OPT) 7343 1 3 5 7 9 11 E3 VIN1 U1 LT3029EDE VOUT1 500mA APPROVED PRODUCTION JP2 VOUT2EN OFF ON JP1 VOUT1EN B DESCRIPTION 1 E1 + CIN1A** 10uF 25V (OPT) 7343 REV ON VIN1* 2.3V - 20V 8 3 2 1 A 7 REVISION HISTORY 1.5V 1.8V 2.5V 3.3V 5V OPT. 1 6 7 1 OF 1 SHEET 8