Voltage regulator device having negative current sensing and control method thereof

A control method of a voltage regulator device, wherein the voltage regulator device includes at least one output unit, a current sensing unit, a control unit, a pulse width modulation unit and at least one transistor driving unit, the output unit outputs an output signal, the output unit includes a first transistor, a second transistor and an energy storage element, the second transistor is electronically connected to the first transistor and the energy storage element, respectively, the current sensing unit is electronically connected to the energy storage element, the control unit is electronically connected to the current sensing unit, the output unit, the pulse width modulation unit, and the transistor driving unit, the control method comprising:

• the current sensing unit sensing a current flowing through the energy storage element of the output unit;
• and
• wherein when the current sensing unit senses that the current flowing through the energy storage element of the output unit is negative, the control unit correspondingly controls to turn off the first transistor and the second transistor of the output unit to cut off a negative current of the energy storage element.