Features and Benefits
- 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
- SmartStart™ Prolongs Battery Life
- 20µA Charger Quiescent Current in Shutdown
- Available in a Low Profile (0.75mm) 10-Lead (3mm × 3mm) DFN Package
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.
- Handheld Computers
- Portable MP3 Players
- Digital Cameras
Product Lifecycle Production
At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.
Evaluation Kits (1)
Documentation & Resources
R402 Reliability Data3/27/2018
DC789A - Demo Manual9/24/2009
Lithium Ion Battery Charger Allows Choice of Termination Method and Includes 100mA Adjustable Low Dropout Regulator12/1/2005 LT Journal
New Standalone Linear Li-Ion Battery Chargers9/1/2005 LT Journal
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal.
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Pricing displayed is based on 1-piece. The USA list pricing shown is for budgetary use only, shown in United States dollars (FOB USA per unit), and is subject to change. International prices may vary due to local duties, taxes, fees and exchange rates.