Voltage control circuit of step-down circuit, step-down device and electronic equipment

The invention is applicable to the technical field of power supplies, and provides a voltage control circuit of a step-down circuit, a step-down device and electronic equipment, and the voltage control circuit comprises a voltage clamping unit, n voltage balancing units and a control unit, the voltage clamping unit is used for clamping the voltage of the clamping end to a target voltage, the difference value between the target voltage and a preset voltage is smaller than a preset error, and the preset voltage is half of the input voltage of the step-down circuit; the first ends of all the voltage balance units are jointly connected with a clamping end, the second end of each voltage balance unit is connected with the first end of a first flying capacitor in one three-level buck converter, and the voltage balance units are used for dynamically maintaining the voltage at the two ends of the first flying capacitor at the target voltage through bidirectional transmission of electric energy; the control unit is us