LTC4053EMSE-4.2#PBF

LTC4053-4.2 is a standalone linear charger for lithium ion batteries that can be powered directly from a USB port. The IC contains an on-chip power MOSFET and eliminates the need for an external sense resistor and blocking diode. Thermal regulation automatically adjusts charge current to limit die temperature during high power or high ambient temperature conditions. This feature protects the end product and the device from thermal stress while the IC charges the battery at maximum rate without interruption. The charge current and charge time can be set externally with a single resistor and capacitor, respectively. When the input supply (wall adapter or USB supply) is removed, this device automatically enters a low current sleep mode, dropping the battery drain current to less than 5µA. It is widely used in applications such as cellular telephones, handheld computers, charging docks and cradles, MP3 players, digital cameras etc.

• Thermal regulation maximizes charge rate without risk of overheating
• Programmable charge termination timer
• Preset charge voltage with ±1% accuracy
• C/10 charge current detection output, AC present logic output
• Automatic recharge, charge current monitor useful for gas gauging
• Thermistor input for temperature qualified charging
• VCC supply voltage range is 4.25V to 6.5V
• VCC supply current is 2mA typ at (charger on; current mode; RPROG = 30KA = 25°C, VCC = 5V)
• Supply current in shutdown mode is 25µA typ at (TA = 25°C, VCC = 5V)
• Operating temperature is -40°C to 85°C, package style is 10-lead plastic DFN

Notes

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