LTC4067EDE#PBF

LTC4067 is a USB power management and Li-ion/Polymer battery charger designed for portable battery powered applications. The part controls total current used by the USB peripheral for operation and battery charging. The total input current may be left unregulated, or it may be limited to 20% or 100% of the programmed value up to 1.5A (typically 500mA). 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. It includes a complete constant current/constant voltage linear charger for single cell Li-ion batteries. The float voltage applied to the battery is held to a tight 0.4% tolerance, and charge current is programmed using an external resistor to ground. An end-of-charge status output, CHRG, indicates full charge. It is used in applications such as automatic battery charging/load switchover, backup battery charger, uninterrupted supplies etc.

• Single resistor at CLPROG pin to set and monitor input current
• 13V overvoltage protection, full featured battery charger with 4.2V float
• Upto 1.25A programmable charge current
• Thermal regulation maximizes charge current without risk of overheating
• Internal 2 hour termination timer from onset of voltage mode charging
• NTC thermistor input, bad battery time-out detection
• Input supply current is 0.4mA typ at (VNTC = 5V, forces IBAT = IPROG = 0)
• Soft start inrush current is 0.3mA/μs typ at (TA = 25°C)
• Operating temperature range from -40°C to 85°C
• Package style is 12-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