A charging circuit for charging a battery of an electronic device includes a first switch having one side connected to an interface into which external power is input, a second switch having one side connected to the other side of the first switch, a third switch having one side connected to the other side of the second switch, a fourth switch having one side connected to the other side of the third switch, a flying capacitor located between the other side of the first switch and the other side of the third switch, an inductor having one side connected to the other side of the second switch, and a control circuit for controlling a charging function of the battery by controlling on/off of the first switch, the second switch, the third switch and the fourth switch.