LTC4065 Datasheet | Linear Technology

.. LTC4065/LTC4065A Standalone 750m A Li-Ion Battery Charger in 2 × 2 DFN Features - - - - - - - DESCRIPTIO - - - - - - - U APPLICATIO S - - - plete Linear Charger in 2mm × 2mm DFN Package C/10 Charge Current Detection Output Timer Termination Charge Current Programmable up to 750m A with 5% Accuracy No External MOSFET, Sense Resistor or Blocking Diode Required Preset 4.2V Float Voltage with 0.6% Accuracy Constant-Current/Constant-Voltage Operation with Thermal Feedback to Maximize Charging Rate Without Risk of Overheating ACPR Pin Indicates Presence of Input Supply (LTC4065A Only) Charge Current Monitor Output for Gas Gauging Automatic Recharge Charges Single Cell Li-Ion Batteries Directly from USB Port 20µA Supply Current in Shutdown Mode Soft-Start Limits Inrush Current Tiny 6-Lead (2mm × 2mm) DFN Package The LTC®4065 is a plete constant-current/constantvoltage linear charger for single-cell lithium-ion batteries. Its 2mm × 2mm DFN package and low external ponent count make the LTC4065 especially well-suited for portable applications. Furthermore, LTC4065 is specifically designed to work within USB power specifications. The CHRG pin indicates when charge current has dropped to ten percent of its programmed value (C/10). An internal timer terminates charging according to battery manufacturer specifications. No external sense resistor or blocking diode is required due to the internal MOSFET architecture. Thermal feedback regulates charge current to limit the die temperature during high power operation or high ambient temperature conditions. When the input supply (wall adapter or USB supply) is removed, the LTC4065 automatically enters a low current state, dropping battery drain current to less than 1µA. With power applied, LTC4065 can be put into shutdown mode, reducing the supply current to less than 20µA. The full-featured LTC4065 also includes automatic recharge, low-battery charge conditioning (trickle charging), soft-start (to...