5 4 3 2 1 REVISION HISTORY ECO REV __ ANDY R. 01-21-13 PRODUCTION GND 1 JP3 VOUT1 SELECT R9 113k R11 249k R15 732k OUT1 OUT2 BYP2 PWRGD1 R5 237k PWRGD2 ADJ1 ADJ2 GND GND GND GND GND GND GND GND GND GND GND GND ON 1.5V 1.8V 2.5V 3.3V 5V OPT E5 8 7 C4 10uF 6.3V 0805 JP4 VOUT2 SELECT 9 D PWRGD2 + C10 OPT 7343 E6 VOUT2 250mA C GND 15 R8 54.9k R10 113k R12 249k R14 402k R16 732k R18 OPT 10 18 13 12 11 6 5 R6 237k B 29 19 24 25 26 3 4 * VIN2 C8 2.2V - 20V 4.7uF 50V OPT 7343 E7 GND 16 IN2 IN1 OUT2 14 R17 OPT 27 B OUT1 BYP1 + E10 C6 0.01uF 28 R13 402k SHDN2 C5 0.01uF 22 R7 54.9k SHDN1 R4 1M 5% 5% 2 4 6 8 10 12 C3 22uF 6.3V 0805 1 3 5 7 9 11 C9 OPT 7343 R2 1M C2 1uF 25V 0805 1 3 5 7 9 11 2 + E4 23 GND E3 2 4 6 8 10 12 VOUT1 750mA 1.5V 1.8V 2.5V 3.3V 5V OPT U1 LT3030EUFD 17 E9 JP2 VOUT2EN JP1 VOUT1EN IN2 5% OFF R1 1M R3 1M 5% R20 OPT 3 2 1 R19 OPT 20 C1 1uF 25V 0805 ON OFF C7 4.7uF 50V OPT 7343 IN1 + GND C DATE E8 E2 PWRGD1 2 APPROVED E1 21 * VIN1 2.2V - 20V 1 2 3 D DESCRIPTION * SEE DEMO MANUAL CUSTOMER NOTICE A NOTE: UNLESS OTHERWISE SPECIFIED 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. ANDY R. 1. ALL RESISTORS ARE IN OHMS 1% 0603 ALL CAPACITORS ARE IN MICROFARADS 0603. TITLE: SCHEMATIC 4 3 IC NO. DATE: REV. LT3030EUFD DEMO CIRCUIT 1855A N/A SCALE = NONE A DUAL 750mA/250mA LDO REGULATOR SIZE THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS. 5 TECHNOLOGY LT 1630 McCarthy Blvd. Milpitas, CA 95035 Phone: (408)432-1900 www.linear.com Fax: (408)434-0507 LTC Confidential-For Customer Use Only Monday, January 21, 2013 2 2 SHEET 1 1 OF 1