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Low-gain current-mode voltage regulator

  • US 7,436,158 B2
  • Filed: 07/27/2006
  • Issued: 10/14/2008
  • Est. Priority Date: 07/27/2006
  • Status: Active Grant
First Claim
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1. A low-gain current-mode voltage regulator comprising:

  • a PWM comparator in response to a first input and a second input for producing a PWM signal to regulate an output voltage of said voltage regulator;

    a low-gain error amplifier for producing a first signal varying with a difference between said output voltage and a reference voltage to provide for said first input;

    a current sense circuit for producing a second signal varying with an inductor current of said voltage regulator to provide for said second input; and

    an offset cancellation circuit for producing an offset signal from a subtraction between said first and second inputs to inject into said PWM comparator.

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