LTC4062 Datasheet | Linear Technology

Features - Charge Current Programmable Up to 1A - Charges Single-Cell Li-Ion Batteries Directly from USB Port - Preset Float Voltage with ±0.35% Accuracy - Micropower parator for Battery Monitoring - Thermal Regulation Maximizes Charge Rate Without Risk of Overheating - Programmable Charge Current Detection/ Termination - Programmable Charge Termination Timer - Smart Pulsing Error Feature - Smart Start TM Prolongs Battery Life - 20µA Charger Quiescent Current in Shutdown - Available in a Low Profile (0.75mm) 10-Lead (3mm × 3mm) DFN Package U APPLICATIO S - Handheld puters - Portable MP3 Players - Digital Cameras , LT, LTC and LTM are registered trademarks of Linear Technology Corporation. Smart Start is a trademark of Linear Technology Corporation. All other trademarks are the property of their respective owners. Protected by U.S. Patents, including 6522118. Standalone Linear Li-Ion Battery Charger with Micropower parator DESCRIPTIO The LTC®4062 is a full-featured, flexible, standalone linear charger for single-cell Lithium-Ion batteries. It is capable of operating within USB power specifications. Both programmable time and programmable current based termination schemes are available. Furthermore, the CHRG open-drain status pin can be programmed to indicate the battery charge state according to the needs of the application. A precise low power parator is available even with no power applied as long as battery voltage is higher than 2.5V. Additional safety Features designed to maximize battery lifetime and reliability include the Smart Start charging algorithm. No external sense resistor or external blocking diode is required for charging due to the internal MOSFET architecture. Internal thermal feedback regulates the charge current to maintain a constant die temperature during high power operation or high ambient temperature conditions. The charge current is programmed with an external resistor. With power applied, the LTC4062 can be put into...