LTC4066EUF-1#PBF

LTC4066-1 is an USB power manager and Li-ion battery charger designed to work in portable battery-powered application. The parts control the total current used by the USB peripheral for operation and battery charging. The total input current can be limited to 100mA, 500mA or “unlimited” (i.e., above 2A). Battery charge current is automatically reduced such that the sum of the load current and the charge current does not exceed the programmed input current limit. It include a standalone constant current/constant-voltage linear charger for single cell Li-ion batteries. The float voltage applied to the battery is held to a tight 0.8% tolerance, and charge current is programmable using an external resistor to ground. A programmable end-of-charge status output indicates full charge. BAT pin charge and discharge currents can be monitored via an analogue output (ISTAT). It is used in application like portable USB devices, GPS, cameras, broadband wireless modems, multiple input chargers.

• Seamless transition between input power sources: Li-Ion battery, USB and 5V wall adapter
• Load dependent charging guarantees USB input current compliance
• Analog gas gauge function, charges single cell Li-Ion batteries directly from USB port
• Termination timer adapts to actual charge current
• NTC thermistor input for temperature qualified charging
• Input supply voltage is 4.35V to 5.5V
• Input supply current is 1.2mA typ at (IBAT = IISTAT = 0, TA = 25°C, VIN = 5V, VBAT = 3.7V)
• Output supply current is 400μA typ at (VOUT = 5V, VIN = 0V, VBAT = 4.3V, TIMER = 0V)
• Operating temperature is -40°C to 85°C
• Package style is 24-lead plastic QFN

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ADI products are only authorized (and sold) for use by the customer and are not to be resold or otherwise passed on to any third party