The LTC1733EMSE#PBF is a monolithic linear Lithium-Ion Battery Charger with an on-chip power MOSFET. Internal thermal feedback regulates the charge current to limit die temperature during high power operation or high ambient temperature conditions. This feature allows the user to program a high charge current without risk of damaging the LTC1733 or the handheld product. No external current sense resistor is needed and no blocking diode is required due to the internal MOSFET architecture. The charge current and charge time can be set externally with a single resistor and capacitor, respectively. When the input supply (wall adapter) is removed, the LTC1733 automatically enters a low current sleep mode, dropping the battery drain current to less than 5μA. The LTC1733 also includes NTC temperature sensing, C/10 detection circuitry, AC present logic, 4.1V/4.2V pin select ability and low battery charge conditioning (trickle charging).
- Complete linear charger for 1-cell Lithium-Ion batteries
- Thermal regulation maximizes charging rate without risk of overheating
- No external MOSFET, sense resistor or blocking diode required
- Up to 1.5A charging current
- Preset charge voltage with 1% accuracy
- Programmable charge current with 7% accuracy
- Programmable charge termination timer
- Charge current monitor useful for gas gauging
- C/10 charge current detection output
- Automatic recharge
- Thermistor input for temperature qualified charging
- AC present logic output
- 4.1/4.2V Pin selectable output voltage
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