The PB15303D is a switch-mode charging IC with maximum 2.2A current for lithium battery and lithium polymer battery. The IC has 5V, 1A OTG function and I2C function. The package type is DFN (3.0mm x 3.0mm) with 12 pins. The PB15303D is designed with standard four-stage charging process: active, pre-charging, constant current, constant voltage and perfect protection mechanism for over current, over voltage, under voltage and over temperature. It is integrated with synchronous PWM control, high power MOSFET, and high voltage OVP circuits. The PB15303D has high charging efficiency (94%), low internal resistance (55mΩ), and high DC withstand voltage (32V).