Variable-frequency and multi-phase voltage regulator module and control method of the same

A host comprising a variable-frequency and multi-phase voltage regulator module, comprising:

• a central processing unit, and
• a variable-frequency multi-phase voltage regulator module for providing a central-processing-unit current to the central processing unit, further comprising:
• a pulse-width-modulation controller for outputting a plurality of phase-width-modulation signal with different phases and having a resistor connecting pin;
• a first resistor comprising a first end and a second end, wherein the first end is connected to the resistor connecting pin and the second end is connected to a relative-low voltage;
• a second resistor comprising a third end connected to the resistor connecting pin;
• a switch transistor, coupled between the relative-low voltage and a fourth end of the second resistor, is controlled by an enable signal;
• a plurality of current providing paths for providing a central-processing-unit current to the central processing unit based on the received phase-width-modulation signals;
• and
• a load-detect circuit with a reference-current value, for resulting in a control signal based on a comparison between an intensity of the central-processing-unit current and the reference-current value;
• wherein the enable signal is controlled by the control signal to generate either a first switching frequency or a second switching frequency, and either all the phase-width-modulation signals are outputted from the pulse-width-modulation controller based on the first switching frequency or a partial phase-width-modulation of the signals are outputted from the pulse-width-modulation controller based on the second switching frequency;
• wherein the variable-frequency and multi-phase voltage regulator module detects an intensity of a central-processing-unit current of the central processing unit and provides a power to the central processing unit via M number of phases based on a first switching frequency if the intensity of the central-processing-unit current is greater than a reference-current value, and the variable-frequency and multi-phase voltage regulator module provides a power to the central processing unit via N number of phases based on a second switching frequency if the intensity of the central-processing-unit current is less than the reference-current value.