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Multiphase Voltage Regulator Using Coupled Inductors

  • US 20140344600A1
  • Filed: 05/20/2013
  • Published: 11/20/2014
  • Est. Priority Date: 05/20/2013
  • Status: Active Grant
First Claim
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1. A method comprising:

  • in response to a first condition not being met;

    asserting a control input of a driver to close a low side switch of a first phase leg of a multiphase voltage regulator, wherein the first phase leg includes a first inductor;

    in response to a signal to close a first high side switch of the first phase leg, de-asserting the control input to open the low side switch; and

    in response to a signal to open the first high side switch, asserting the control input to close the low side switch; and

    in response to the first condition being met;

    de-asserting the control input to open the low side switch;

    in response to a signal to close a second high side switch of a second phase leg of the multiphase voltage regulator and to the control input being de-asserted, asserting the control input to close the low side switch, wherein the second phase leg comprises a second inductor magnetically coupled to the first inductor; and

    in response to a signal to open the second high side switch and to a second condition being met, wherein the second condition includes the control input being asserted, de-asserting the control input to open the low side switch.

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