REVISION HISTORY ECO REV DESCRIPTION APPROVED DATE 1 PRODUCTION FAB M. MERCHANT 03-12-12 C3 1uF U1 E1 9 VIN 4.5V - 32V C1 4.7uF 50V 1210 E2 GND R2 1M R1 1M 5% 5% C2 10uF 50V 1210 VIN 8 50V 1206 5 C+ C- E6 VOUT EN 1 2 3 ON OFF JP1 EN E3 R5 1K 5% E4 MODE 10 MODE 1 BURST CONT FREQ 2 3 JP2 C5 OPT 0603 11 C6 OPT 0603 EN MODE 4 NC 1 NC 3 NC 6 NC 7 NC 12 RT 2 VOUT C4 10uF 50V 1210 GND LTC3261EMSE ( - VIN ) 100mA E7 GND R3 1.0M 13 FREQ R6 1K 5% R4 200K E5 50KHz 1 2 3 4 200KHz 500KHz JP3 GND CUSTOMER NOTICE NOTE: UNLESS OTHERWISE SPECIFIED 1. ALL RESISTORS ARE 0402, 1%, 1/16W 2. INSTALL SHUNTS AS SHOWN. 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. THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS. APPROVALS PCB DES. TECHNOLOGY NC APP ENG. MARTY M. 1630 McCarthy Blvd. Milpitas, CA 95035 Phone: (408)432-1900 www.linear.com Fax: (408)434-0507 LTC Confidential-For Customer Use Only TITLE: SCHEMATIC LOW NOISE INVERTING CHARGE PUMP SIZE IC NO. N/A SCALE = NONE DATE: 03-12-12 REV. LTC3261EMSE DEMO CIRCUIT 1882A 1 SHEET 1 OF 1