ver: 0.93 may 27, 2013 tel: 886-3-5788833 http://www.gmt.com.tw 1 G5805 global mixed-mode technology single cell li-ion battery linear charger features ? 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 applications ? mp3 players ? cellular phones ? pdas ? hand-held devices 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 and block- ing 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 exter- nal resistor. after the final regulation voltage is reached and the charge current drops to 1/10 th the programmed charge current, the open drain nmos chrg pin would be turn off automatically without terminating the charge loop. other features include under voltage lockout, auto- matic recharge, over temperature protection and a charge status indication pin. 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 bat prog gnd G5805 2k v in 4.5v to 6.5v 1 f 500ma single cell li-ion charger li-lon battery vin chrg 300 v in led 1.5 * * 1.5 resistor in series with a ceramic capacitor will minimize the start-up voltage overshoot transients prog tsot-23-5 5 4 1 chrg 2 3 gnd bat G5805 vin bat prog gnd G5805 2k v in 4.5v to 6.5v 1 f 500ma single cell li-ion charger li-lon battery vin chrg 300 v in led 1.5 * * 1.5 resistor in series with a ceramic capacitor will minimize the start-up voltage overshoot transients prog tsot-23-5 5 4 1 chrg 2 3 gnd bat G5805 vin
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