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Compensation for low drop out voltage regulator

  • US 6,977,490 B1
  • Filed: 07/15/2003
  • Issued: 12/20/2005
  • Est. Priority Date: 12/23/2002
  • Status: Expired due to Term
First Claim
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1. A voltage regulator, comprising:

  • an error amplifier that amplifies a voltage difference between a reference voltage and a sampled output voltage of the voltage regulator;

    a driver amplifier that receives said amplified voltage difference and that produces a gate driving voltage;

    an output transistor that has a gate that receives said gate driving voltage and a source that outputs a regulated output voltage;

    a Miller compensation capacitor that feeds a sample of said regulated output voltage back to an input of said driver amplifier; and

    an Ahuja compensation circuit that feeds a portion of said regulated output voltage back to said input of said driver amplifier.

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