DESCRIPTION
The LTC®4078/LTC4078X are standalone linear chargers that are capable of charging a single-cell Li-Ion/Polymer battery from both wall adapter and USB inputs. The chargers can detect power at the inputs and automatically select the appropriate power source for charging.

FEATURES
■ 22V Maximum Voltage for Wall Adapter and
   USB Inputs
■ Charge 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
■ Overvoltage Lockout for Wall Adapter and USB Inputs
■ Battery Detection Input Disables Charger When No
   Battery is Present
■ 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
■ 40μA USB Suspend Current in Shutdown
■ Charge Status Output
■ Automatic Recharge
■ Available Without Trickle Charge (LTC4078X)
■ Available in a Thermally Enhanced, Low Profi le
   (0.75mm) 10-Lead (3mm × 3mm) DFN Package

APPLICATIONS
■ Cellular Telephones
■ Handheld Computers
■ Portable MP3 Players
■ Digital Cameras