Multi-phase SMPS with load transient control and associated control method

摘要

The present invention discloses a multi-phase switch-mode power supply (SMPS). The multi-phase SMPS may comprise a plurality of comparing circuits and a controller. Wherein each comparing circuit comprises a first input coupled to a threshold voltage, a second input coupled to a feedback signal of the output voltage, and an output configured to provide a load indication signal. The controller may have a plurality of inputs coupled to the outputs of the comparing circuit, and a plurality of outputs configured to provide control signals for driving a plurality of switches of the multi-phase SMPS. And the controller is configured to selectively turn on a plurality of the switches according to the load indication signals.

主权项

1. A multi-phase SMPS, comprising:
N switching circuits coupled to an output node, each switching circuit comprising a switch, wherein the multi-phase SMPS is configured to provide an output voltage at the output node to supply a load, where N is a natural number; a plurality of comparing circuits, each comparing circuit having a first input, a second input and an output, wherein the first input is coupled to a threshold voltage, wherein the second input is coupled to a same feedback signal of the output voltage and wherein the output is configured to provide a load indication signal; and a controller, comprising a plurality of inputs and N outputs, wherein each of the plurality of inputs is coupled to an output of a corresponding comparing circuit to receive the respective load indication signal, wherein each of the N outputs is configured to provide a control signal that is coupled to a control end of a corresponding switch, and wherein the controller is configured to selectively turn on a plurality of switches simultaneously according to the load indication signals.