5 SHDN JP1 SHDN E3 SHDN 5 R3 1M 4 C 1. ALL RESISTORS ARE IN OHMS, 0402. ALL CAPACITORS ARE IN MICROFARADS, 0402. A 2. INSTALL SHUNT ON JP1 PIN 1 AND 2. GND U1 * E1 VCAP E4 C2 * 1206 FB 6 GND E6 VOUT 15V * C GND B FOR ASSEMBLY C2 C3 -A LT3494EDDB 2.2UF 0.22UF -B LT3494AEDDB 4.7UF 0.47UF CUSTOMER NOTICE D1 VOUT OPT 15V @ 17mA CMDSH-3 15V @ 27mA 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. 4 VOUT R2 2.05M THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS. 5 * 0805 VOUT 7 CTRL B NOTES: UNLESS OTHERWISE SPECIFIED VCAP C3 SHDN CTRL DC1024A * CAP 8 2 CTRL E5 1 U1 SW 1 RUN C1 4.7UF,6.3V 0603 D * 2 MURATA LQH32C GND GND R1 1M 1 D1 L1 15UH VIN E7 2 9 VIN 3V - 4.2V E2 3 VCC 3 D 4 3 APPROVALS DRAWN: CHECKED: APPROVED: ENGINEER: JESUS R. DESIGNER: TECHNOLOGY KIM T. TITLE: 1630 McCarthy Blvd. Milpitas, CA 95035 Phone: (408)432-1900 Fax: (408)434-0507 LTC Confidential-For Customer Use Only SCHEMATIC A MICROPOWER LOW NOISE BOOST CONVERTER WITH OUTPUT DISCONNECT SIZE DWG NO. A DATE: DC1024A-1 LT3494EDDB/LT3494AEDDB Friday, October 27, 2006 SHEET 2 1 REV A-1 1 OF 1