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Circuits and methods for improving transient response of hysteretic DC-DC converters

  • US 8,138,739 B1
  • Filed: 10/03/2008
  • Issued: 03/20/2012
  • Est. Priority Date: 10/03/2008
  • Status: Active Grant
First Claim
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1. A method of operating a hysteretic DC-DC converter, the method comprising:

  • monitoring an output voltage of a hysteretic DC-DC converter, the output voltage being coupled to a load;

    differentiating the output voltage to generate a control signal indicative of a difference between current drawn by the load and current flowing through an output inductor of the converter;

    injecting the control signal into a control loop of the converter, andadjusting a reference signal to a hysteretic comparator of the converter based at least on the control signal injected into the control loop.

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