Electronic device for performing power management and method for operating the same

A power management circuit configured to transfer power to at least one of a plurality of external loads, the power management circuit comprising:

• a plurality of regulators configured to adjust power provided from a power source and output the adjusted power, the plurality of regulators comprising a first regulator and a second regulator;
• a switching circuit configured to selectively connect the plurality of regulators to at least one of the plurality of external loads;
• and
• a micro-controlling unit (MCU) configured to:
• identify a load to which the adjusted power is to be supplied among the plurality of external loads,
• identify a magnitude of a current required by the identified load,
• obtain a first value of a power conversion efficiency of the first regulator for supplying the current with the magnitude to the identified load and a second value of a power conversion efficiency of the second regulator for supplying the current with the magnitude to the identified load,
• based on the first value and the second value, select at least one regulator from among the first regulator and the second regulator for supplying the current with the magnitude to the identified load, wherein the power conversion efficiency of the selected at least one regulator is greater than equal to a predetermined value, and
• control the switching circuit to connect the at least one regulator to the identified load.