LTC4061EDD#PBF

LTC4061 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. Additional safety features designed to maximize battery lifetime and reliability include NTC battery temperature sensing and 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. It is widely used in applications such as handheld computers, portable MP3 players, digital cameras etc.

• Charge current programmable upto 1A, programmable charge termination timer
• Charges single-cell Li-ion batteries directly from USB port
• Preset charge voltage with ±0.35% accuracy
• Thermistor input for temperature qualified charging
• Input supply present logic output
• Programmable charge current detection/ termination
• Smart pulsing error feature, SmartStart™ prolongs battery life
• Shutdown current is 20µA typ at (EN = 5V, VCC <lt/> VBAT or VCC <lt/> VUV)
• Input supply voltage from 4.3V to 8V, soft-start time is 100µs typ at (IBAT from 0 to ICHRG)
• Operating temperature range from -40°C to 85°C, package style is 10-lead plastic DFN

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