4 3 2 1 REVISION HISTORY ECO 4 E1 ON OFF R1 VBUS 10V - 15V C1 1uF 25V 0603 10 % E2 GND JP7 LBO LED OFF R9 1.0 5% OPT 25 mils clearance NTC HBO 2 NTC GND GND 5 9 LBO OPT 1 1 2 3 OPT R8 1K 5% E6 4 HBO E5 6 LBO E4 2 Charging GND HBO LED JP6 D2 1 Charged INT 3 BAT GND ENTC 2 Q1 FDN352AP OPT 1 JP5 NTC JP3 GND D1 LBO 2 25 mils clearance 25 mils clearance 1 NTCBIAS R3 10k E3 7 3 R2 200 DRV E7 R11 1.0 5% OPT J1 DF3-3P-2DSA 8 VCC R10 1.0 5% OFF C2 0.22uF 25V 0805 ADJ 4 BAT 75mA OPT U1 LTC4070EDDB 3 10/15/09 100uF 6.3V 1206 20 % ON 4.2V 4.1V 4.0V DATE NJC E8 JP4 SHUNT JP2 VFLOAT APPROVED PRODUCTION RELEASE C3 ON 3 DESCRIPTION A 25 mils clearance 169 1% 2512 JP1 VIN REV 2 HBO R7 Charging 1K 5% Charged 2 R4 EXT 0 R5 0 R6 10k 1 Unless noted: Resistors: Ohms, 0402, 1%, 1/16W Capacitors: uF, 0402, 10%, 50V CUSTOMER NOTICE 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. THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS. 4 3 2 APPROVALS TECHNOLOGY DRAWN: G. Barbehenn CHECKED: APPROVED: ENGINEER: G. Barbehenn DESIGNER: 1630 McCarthy Blvd. Milpitas, CA 95035 Phone: (408)432-1900 Fax: (408)434-0507 LTC Confidential-For Customer Use Only TITLE: LTC4070EDDB: SIMPLE LOW - Iq BATTERY CHARGER / PROTECTOR WITH NTC THERMISTOR INPUT SIZE X DATE: DWG NO. REV DC1584A A SHEET Wednesday, November 04, 2009 1 1 OF 1 1