G5805 Global Mixed-mode Technology Single Cell Li-Ion Battery Linear Charger Features General Description The G5805 is a standalone linear Li-Ion battery charger with a complete pre-charge, constant-current and constant-voltage charge loop. No External Power MOSFET, Sense Resistor or Blocking Diode Required 1% Regulation Voltage Accuracy Programmable Constant Charge Current Limit up to 800mA Automatic Recharge Complete Pre-Charge, Constant Current, Constant Voltage and Charge Termination Charge Procedure Support for 5V Power Supply Voltage Internal Thermal Protection Circuit TSOT-23-5 Package No external power MOSFET, sense resistor and blocking diode is required due to internal power MOSFET architecture. The charge voltage is regulated at 4.2V, and the charge current is programmable by an external resistor. After the final regulation voltage is reached and the charge current drops to 1/10th the programmed charge current, the open drain NMOS CHRG pin would be turn off automatically without terminating the charge loop. Applications Other features include under voltage lockout, automatic recharge, over temperature protection and a charge status indication pin. MP3 Players Cellular Phones PDAs Hand-Held Devices Ordering Information ORDER NUMBER MARKING TEMP. RANGE PACKAGE (Green) G5805TO1U 5805x -40°C ~ +85°C TSOT-23-5 Note: TO: TSOT-23-5 1: Bonding Code U: Tape & Reel Pin Configuration Typical Application Circuit 500mA Single Cell Li-Ion Charger VIN 300Ω VIN 4.5V to 6.5V G5805 CHRG 1 GND 2 BAT 3 5 G5805 LED VIN PROG 1µF BAT 1.5Ω* 4 CHRG GND VIN TSOT-23-5 PROG Li-lon Battery 2k *1.5Ω resistor in series with a ceramic capacitor will minimize the start-up voltage overshoot transients TEL: 886-3-5788833 http://www.gmt.com.tw Ver: 0.93 May 27, 2013 1