What is a Power Management Unit?
The power management unit, or PMU, is a type of microcontroller that is associated with the configuration of computers manufactured by Apple. Essentially, the power management unit controls the power functions on the computer. Currently, all Apple computers make use of a power management unit. It is helpful to think of the power management unit as a very powerful microchip. Within the context of the function of an Apple computer, this microchip covers the functions supported by other types of components in other brands of computers. Some examples would include software, firmware, and memory capacity. Along with these three key components, a power management unit also provides for analog to digital conversion functions and even includes a CPU. This broad range of support allows the power management unit to coordinate a number of essential tasks that keep the computer operational. For example, the PMU will constantly monitor the status of any power connections that are presently engaged.
