Multiphase zero-volt-switching resonant DC-DC regulator

A multiphase DC-DC regulator, the regulator including a DC output, the regulator comprising:

• zero volt switch
• a DC output voltage means coupled to the zero volt switch and the DC output;
• a variable resonant circuit coupled to the DC output voltage means, the variable resonant circuit comprising:
• a resonant inductor coupled to the DC output voltage means, and
• a resonant capacitor coupled to the resonant inductor and the DC output voltage means;
• a synchronous rectifier coupled to the DC output voltage means and the variable resonant circuit;
• and
• a sensing circuit coupled to the DC output and the resonant inductor of the variable resonant circuit, wherein the sensing circuit senses changes in a DC output voltage at the DC output,
• wherein if the sensing circuit senses an increase in the DC output voltage, then a resonant frequency of the DC output voltage means is decreased by the variable resonant circuit,
• wherein if the sensing circuit senses a decrease in the DC output voltage, then a resonant frequency of the DC output voltage means is increased by the variable resonant circuit.

A multiphase DC-DC regulator, the regulator including a DC output, the regulator comprising:

• an oscillator;
• a phase one circuit coupled to the oscillator, the phase one circuit comprising:
• a first zero volt switch
• a first DC output voltage means coupled to the first zero volt switch and the DC output,
• a first variable resonant circuit coupled to the first DC output voltage means, and
• a first synchronous rectifier coupled to the first DC output voltage means and the first variable resonant circuit;
• a phase two circuit coupled to the oscillator, the phase two circuit comprising:
• a second zero volt switch
• a second DC output voltage means coupled to the second zero volt switch and the DC output,
• a second variable resonant circuit coupled to the second DC output voltage means, and
• a second synchronous rectifier coupled to the second DC output voltage means and the second variable resonant circuit,
• wherein an operation of the phase two circuit is out of phase with an operation of the phase one circuit;
• and
• a sensing circuit coupled to the DC output, the first variable resonant circuit, and the second variable resonant circuit, wherein the sensing circuit senses changes in a DC output voltage at the DC output,
• wherein if the sensing circuit senses an increase in the DC output voltage, then a resonant frequency of the regulator is decreased by the first and second variable resonant circuits,
• wherein if the sensing circuit senses a decrease in the DC output voltage, then a resonant frequency of the regulator is increased by the first and second variable resonant circuits.