The MP2650 is a highly integrated buck or boost charger IC with narrow-voltage DC (NVDC) power path management and USB On-The-Go (OTG). It is designed for battery packs with 2 cells to 4 cells in series. All power MOSFETs are integrated to provide a compact system solution size. The IC can accept a wide input voltage (V_IN) range for charging, with a 21V maximum V_IN. The MP2650 has two operating modes during the charging process: boost charging mode and buck charging mode, depending on V_IN and the cell count.

With the I²C interface, the MP2650 can be flexibly configured to set the parameters in boost charging mode, buck charging mode, and OTG mode. The parameters include the input current limit (I_{IN_LIM}), V_IN limit (V_{IN_LIM}), charge current (I_CHARGE), battery charge voltage regulation (V_{BATT_REG}), and safety charge timer. The I²C can also provide the IC’s operation status via the fault and status registers.

To guarantee safe operation, the IC limits the die temperature to a preset value of 120°C. Other safety features include input over-voltage protection (OVP), battery OVP, system OVP, thermal shutdown, battery temperature protection, and a configured timer to prevent prolonged charging of a dead battery. To comply with IMVP8 specifications, the IC provides three analog output pins for system power (PSYS), input current (IAM), and battery current (IBM). It also has a processor hot indication pin (PROCHOT) for system power control.

NVDC power path management regulates the system voltage (V_SYS) within a narrow DC range to provide an optimized bus voltage (V_BUS) for the rails at the system bus. This allows the system to operate even when the battery is completely depleted or removed. The MP2650 is available in a QFN-30 (4mmx5mm) package.