LTC4059 Datasheet - Linear Technology

DESCRIPTION
The LTC®4059/LTC4059A are constant-current/constant voltage linear chargers for single cell lithium-ion batteries. Their 2mm × 2mm DFN package and low external component count make these chargers especially well suited for portable applications. Furthermore, they are designed to work within USB power specifications.

FEATURES
■ Programmable Charge Current Up to 900mA
■ Charge Current Monitor Output for Charge Termination
■ Constant-Current/Constant-Voltage Operation with Thermal Regulation to Maximize Charging Rate Without Risk of Overheating*
■ Constant-Current Source Mode for Charging Nickel Batteries (LTC4059 Only)
■ ACPR Pin Indicates Presence of Input Supply (LTC4059A Only)
■ No External MOSFET, Sense Resistor or Blocking Diode Required
■ Operating Supply Voltage from 3.75V to 8V
■ Charges Single Cell Li-Ion Batteries Directly from USB Port
■ Preset 4.2V Charge Voltage with 0.6% Accuracy
■ 10µA Supply Current in Shutdown Mode
■ Tiny 6-Lead (2mm × 2mm) DFN Package

APPLICATIONS
■ Wireless PDAs
■ Cellular Phones
■ Portable Electronics
■ Wireless Headsets
■ Digital Cameras