LTC3550-1 Datasheet

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LTC3550-1 Datasheet  Dual Input USB/AC Adapter Li-Ion Battery Charger with 600mA Buck Converter


FEATURES
■ Charges Single-Cell Li-Ion Batteries from Wall Adapter and USB Inputs
■ Automatic Input Power Detection and Selection
■ Charge Current Programmable Up to 950mA from Wall Adapter Input
■ High Effi ciency 600mA Synchronous DC/DC Converter
■ No External MOSFET, Sense Resistor or Blocking Diode Needed
■ Thermal Regulation Maximizes Charge Rate Without Risk of Overheating*
■ Preset Charge Voltage with ±0.6% Accuracy
■ Programmable Charge Current Termination
■ 1.5MHz Constant Frequency Operation (Step-Down Converter)
■ 18μA USB Suspend Current in Shutdown
■ Independent “Power Present” Status Outputs
■ Charge Status Output
■ Automatic Recharge
■ Available in a Thermally Enhanced, Low Profile (0.75mm) 16-Lead (5mm x 3mm) DFN Package



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