5 4 3 2 ECO REV 2 - E1 VIN -1.5V to -36V R13 (Opt) GND R14 0 Ohm 1 2 11 CIN2 4.7µF 50V X7R 1206 * CIN1 10µF 50V + E4 PRODUCTION R1 R1 10.0k 1% 0805 3 SHDN 2 3 USER SELECT 6 ON 4 1 4 5 OFF IN IN IN OUT OUT ILIM SET SHDN Nov 13, 2013 VOUT C1 4.7µF 50V X7R 1206 R2 49.9k 1% 0805 D 7 E3 GND 8 R12 0 Ohm JP4 E9 VOUT -600mA Max C3 (Opt) 1206 C2 0.1µF GND E2 9 10 IMONP IMONN DATE EDWIN LI U1 LT3090EDD VIN D 1 REVISION HISTORY DESCRIPTION APPROVED SHDN E6 1 IMONP C 3 VIN R15 (Opt) 1 IMONP 3 R4 2.00k 1% 4 VIN IMP JP1 -1.25V 4 -2.5V R5 R6 24.9k 1% -5V 49.9k 1% 7 8 -12V R8 9 R9 243k 1% 10 -15V USER SELECT R10 301k 1% 12 11 C R7 6 5 2 2 100k 1% (Opt) JP2 E7 IMONN IMONN E8 +3V C4 1µF 10V B R11 1.00k 1% 4 5 6 +3V IMN B CDC CUSTOMER NOTICE 1. ALL RESISTORS 0603. 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. 2. ALL CAPACITORS 0603. * 2 3 JP3 NOTE: UNLESS OTHERWISE SPECIFIED. A 1 R1 = 10k is chosen to activate internal current limit. If lower current limit is required, modify R1 value. EDWIN LI C:\PADS PROJECTS\1948A(LT3090EDD)\SCH\1948A_REV2.DSN THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS. 5 4 3 TECHNOLOGY RB LTC CONFIDENTIAL - FOR CUSTOMER USE ONLY TITLE: SCHEMATIC SIZE N/A SCALE = NONE 1630 McCarthy Blvd. Milpitas, CA 95035 www.linear.com Phone: (408)432-1900 Fax: (408)434-0507 -36V, 600mA Negative Linear Regulator with Programmable Current Limit IC NO. REV. LT3090EDD 2 Demo Circuit 1948A MODIFY DATE: Nov 13, 2013 2 SHEET 1 1 OF 1 A