The ADP5091ACPZ-2-R7 is a battery management integrated circuit manufactured by Analog Devices. It is an ultra-low-power (ULP) Li-ion/Li-polymer battery charger with secondary-side charging control. The IC provides a power solution for portable electronics and includes a host of features and a highly accurate charge termination algorithm for improved charge cycle life. The IC supports up to four battery cells in series and provides a maximum charge current of 300mA. It also includes advanced features such as end-of-charge detection circuitry, under-voltage protection, and safety timers. The device is capable of delivering fast, accurate charging for a wide range of battery types across various temperature and capacity ranges.