Features and Benefits
- Charge Current Programmable up to 1A
- Charges Single Cell Li-Ion Batteries Directly from USB Port
- Preset 4.375V Float Voltage with ±0.4% Accuracy
- Thermistor Input for Temperature Qualified Charging
- Input Supply Present Logic Output
- 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 LTC4061-4.4 is a full-featured, flexible, standalone linear charger for single-cell 4.375V 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. Additional safety features designed to maximize battery lifetime and reliability include NTC battery temperature sensing and 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 LTC4061-4.4 can be put into shutdown mode to reduce the supply current to 20µA and the battery drain current to less than 5µA.
Other features include smart recharge, USB C/5 current programming input, undervoltage lockout and AC Present logic output.
|Float Voltage (V)|
- 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)
LTC4061-4.4 Companion Parts
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.View our quality and reliability program and certifications for more information.
|Part Number||Material Declaration||Reliability Data||Pin/Package Drawing||CAD Symbols, Footprints & 3D Models|
|LTC4061EDD-4.4#PBF||Material Declaration||Reliability Data||10-Lead DFN (3mm x 3mm w/ EP)|
|LTC4061EDD-4.4#TRPBF||Material Declaration||Reliability Data||10-Lead DFN (3mm x 3mm w/ EP)|
|Wafer Fabrication Data||R402 Reliability Data|
Sample & Buy
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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.