Multi-phase switching regulator including interleaving circuit and switching regulating method using the same

A multi-phase switching regulator, comprising:

• a first regulating circuit configured to receive an input voltage and to output a first sub-output voltage with a first phase to a first output node by transforming the input voltage;
• a second regulating circuit configured to receive the input voltage and to output a second sub-output voltage with a second phase to a second output node by transforming the input voltage;
• a third regulating circuit configured to receive the input voltage and to output a third sub-output voltage with a third phase to a third output node by transforming the input voltage;
• a first current sensor configured to sense a first current flowing in the first output node;
• a second current sensor configured to sense a second current flowing in the second output node;
• a third current sensor configured to sense a third current flowing in the third output node;
• a first current balancer configured to receive a current selected among the first to third current and to receive the second current and to output a first current control signal to the second regulating circuit based on a reference sensing value of a selected current and a second sensing value of the second current, and
• a second current balancer configured to receive the current and the third current and to output a second current control signal to the third regulating circuit based on the reference sensing value and a third sensing value of the third current,
• wherein the second regulating circuit adjusts a second current level of the second current to be equal to a select current level of the selected current based on the first current control signal, and
• wherein the third regulating circuit adjusts a third current level of the third current to be equal to the select current level based on the second current control signal.

A multi-phase switching regulator, comprising:

• a first regulating circuit configured to receive an input voltage and to generate a first sub-output voltage with a first phase by transforming the input voltage;
• a second regulating circuit configured to receive the input voltage and to generate a second sub-output voltage with a second phase by transforming the input voltage;
• a first voltage sensor configured to sense the first sub-output voltage;
• a second voltage sensor configured to sense the second sub-output voltage;
• and
• a voltage balancer configured to output a voltage control signal to the second regulating circuit based on a first sensing value of the first sub-output voltage and a second sensing value of the second sub-output voltage, and
• wherein the second regulating circuit adjusts a voltage level of the second sub-output voltage to be equal to a voltage level of the first sub-output voltage based on the voltage control signal.