Apparatus for managing power of vehicle and method of controlling the same

The present disclosure provides a power management apparatus of a vehicle and a method of controlling the same, for determining whether a power circuit of a vehicle controller is abnormal. The power management apparatus includes a battery, a battery sensor configured to acquire voltage information of the battery, and a controller configured to receive the voltage information of the battery, to compare a second voltage and a third voltage with preset reference information, and to determine whether power is abnormal, wherein a first voltage is measured by the controller, the second voltage is adjusted by converting the first voltage into a digital signal, and the third voltage is measured by the battery sensor.