1 2 REVISION HISTORY ECO REV 1 1 DESCRIPTION APPROVED PRODUCTION JAMES N. DATE 4-15-10 VAUX C3 1uF 6.3V Place on Back of Board D1 (OPT) 2 1 E5 U1 A E3 C1 1nF 9 8 7 2 VAUX *2 VAUX GND 3 OFF JP2 1 1 JP1 C1 VOUT VOUT2_EN VOUT2 VS1 VLDO VS2 PGD JP3 * 2 3 CHARGE 3 DISCHARGE R1 100 4 5 C11 220uF 6.3V C7 (OPT) C9 (OPT) E4 VOUT 6 C6 220uF 6.3V E6 GND GND VOUT2 C5 0.1uF 6.3V VLDO C4 2.2uF 6.3V VOUT JUMPER CONFIGURATION * * E7 3 ON VAUX 3 GND VOUT2 1 + E2 JP4 1 13 C8 330uF 4V VLDO 2 GND 10 3 VSTORE C10 (OPT) + 1 C2 1 + E1 VIN 20mV - 400mV VAUX 2 11 C2 330pF SW + R2 499K + 12 LPR6235-752SML 4 A VSTORE ** T1 2 GND LTC3108 VOUT E8 VLDO E9 GND LTC3108-1 JP2 JP3 GND GND 2.35V 2.5V VAUX GND 3.3V 3.0V GND VAUX 4.1V 3.7V VAUX VAUX 5.0V 4.5V VOUT E10 PGD B B CUSTOMER NOTICE NOTE: UNLESS OTHERWISE SPECIFIED 1. ALL RESISTORS ARE IN 0603. ALL CAPACITORS ARE IN 0603. ** 2. INSTALL SHUNTS AS SHOWN. ASSY U1 -A LTC3108EDE -B 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. PCB DES. HZ APP ENG. JIM N. TECHNOLOGY 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 ULTRALOW VOLTAGE STEP-UP CONVERTER AND POWER MANAGER SIZE LTC3108EDE-1 THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS. 1 APPROVALS IC NO. N/A SCALE = NONE LTC3108EDE / LTC3108EDE-1 DEMO CIRCUIT 1582B Friday, April 23, 2010 DATE: 2 SHEET 1 REV. 1 OF 1