The LTC4061 from Linear Technology is a standalone linear charger for single-cell lithium-ion batteries. It can operate within USB power specifications and supports programmable time and programmable current based termination schemes.
The device includes an NTC thermistor input for temperature-qualified charging and the SmartStart charging algorithm. It is available in a 10-lead 3mm × 3mm DFN package and requires no external sense resistor or external blocking diode because of its internal MOSFET architecture.
| Input Supply Voltage | 4.3V to 8V |
|---|---|
| Battery Regulated Output Voltage | 4.2V |
| Programmable Charge Current | Up to 1A |
| Operating Temperature Range | –40°C to 85°C |
| Package | 10-lead 3mm × 3mm DFN package |
| Shutdown Supply Current | 20µA |
| Battery Temperature Sensing | NTC thermistor input |
It is designed as a standalone linear charger for single-cell lithium-ion batteries.
Yes; it is capable of operating within USB power specifications.
The charge current is programmed with an external resistor.
With power applied, the LTC4061 can be put into shutdown mode to reduce the supply current to 20µA.