LTC4062 - Standalone Linear Li-Ion Battery Charger with Micropower Comparator

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 Comparator 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
  • SmartStartTM Prolongs Battery Life
  • 20µA Charger Quiescent Current in Shutdown
  • Available in a Low Profile (0.75mm) 10-Lead
    (3mm × 3mm) DFN Package

Typical Application

LTC4062 Typical Application
LTC4062 Typical Application

Description

The LTC4062 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 comparator 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 SmartStart 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 shutdown mode to reduce the supply current to 20µA and the battery drain current to less than 5µA. Without power applied, the internal low power comparator can work sinking only 10µA from the battery.

Other features include smart recharge, USB C/5 current programming input and undervoltage lockout.

*Protected by U.S. Patents, including 6522118.

Packaging

For complete and up to date package information and drawings, please refer to our packaging page

DFN-10

LTC4062 Package Drawing

Order Info

Package Variations and Pricing

Part Number Package Pins Temp Price (1-99) Price (1k)* RoHS Data
LTC4062EDD DFN 10 E $2.32 $1.95 View
LTC4062EDD#PBF DFN 10 E $2.32 $1.95 View
LTC4062EDD#TR DFN 10 E $2.05 View
LTC4062EDD#TRPBF DFN 10 E $2.05 View
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* The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Linear Technology sales office or authorized distributor.

Demo Boards

Linear Technology offers many demo boards free of charge to qualified customers. Contact your local sales office or distributor to inquire about a demo board. Certain demo boards are also available for sale via credit card on this website. Demo boards are for evaluation purposes only. It remains the customer’s responsibility to verify proper and reliable operation in the actual end application.

Part Number Description Price Documentation
DC789A LTC4062EDD | Single Cell Li-Ion Battery Charger With Comparator, +Vin = 4.3V-8V, Bat = 4.2V@0.5A/1A $75.00
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Click here to view our complete list of demo boards

Applications

  • Handheld Computers
  • Portable MP3 Players
  • Digital Cameras

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Design Tools

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