The MP2765 is a highly integrated, buck-boost charger IC with narrow-voltage DC (NVDC) power path management control and USB On-The-Go (OTG) Mode for 2-cell to 4-cell battery pack applications. The IC can accept a wide input voltage (V_IN) range (up to 22V) for power conversion. It can operate in dual-phase interleaved mode to facilitate the inductor selection, as a small inductance and lower inductor saturation current corresponds to a smaller inductor profile.

When input power (P_IN) is present, the IC measures the battery voltage (V_BATT) automatically and charges the battery with five phases: constant-current (CC) trickle charge, pre-charge, fast linear charge, CC fast charge, and constant-voltage (CV) charge.

The MP2765 controls an external N-channel MOSFET to achieve NVDC power path management. When V_BATT is low and an input is present, the device regulates the system voltage (V_SYS) to a minimum level to guarantee system operation. If the input source current or voltage limit is reached, power path management automatically reduces the charge current to meet the system power requirement priority. If the system current keeps increasing, even when the charge current is reduced to 0A, supplement mode allows the battery to power the system simultaneously with the input power supply. When the input is absent, the system is powered by the battery through the BATTFET.

The IC also provides a wide 4V to 21V output voltage (V_OUT) range, with 6.25mV/step at the input in USB OTG mode. It also features output current (I_OUT) limit regulation in USB OTG Mode.

The I²C/SMBus interface enables the MP2765 to be flexibly configured to set the charging parameters, such as the input current (I_IN) limit, V_IN limit, charge current, charge termination voltage, minimum V_SYS, and the V_OUT and I_OUT in USB OTG mode. It can also provide the operation status through status and fault registers.

The MP2765 is available in a QFN-32 (4mmx5mm) package.