Patent ID: 7107468

Claim:
A multiphase buck converter system with peak current sharing comprising: a first buck converter coupled to a first regulator input voltage and generating a first converter output voltage for powering a common load in response to a first ON-time pulse set to a first logic state by a first start signal and set to a second logic state by a first stop signal, wherein said first converter output voltage supplies energy to said common load directly from said first regulator input voltage when said first ON-time pulse has said first logic state and said first converter output voltage supplies stored energy from said first regulator input voltage when said first ON-time pulse has said second logic state; a second buck converter coupled to a second regulator input voltage and generating a second converter output voltage for powering said common load in response to a second ON-time pulse set to a first logic state by a second start signal and set to a second logic state by a second stop signal, wherein said second converter output voltage supplies energy to said common load directly from said second regulator input voltage when said second ON-time pulse has said first logic state and said second converter output voltage supplies stored energy from said second regulator input voltage when said second ON-time pulse has said second logic state; start circuitry for generating said first and second start signals in response to a regulated voltage across said common load, a reference voltage, and said first and second ON-time pulses; first stop circuitry for generating said first stop signal in response to said first regulator input voltage and said reference voltage; and second stop circuitry for generating said second stop signal in response to a first output current from said first converter output voltage supplied to said common load, a second output current from said second converter output voltage supplied to said common load, and said first ON-time pulse.