Voltage regulator with improved electrical properties and corresponding control method

A voltage-regulator device, comprising:

• an error-amplifier stage configured to receive a first reference voltage and a feedback voltage;
• an output amplifier stage coupled to the error-amplifier stage, and configured to generate an output voltage related to the first reference voltage by an amplification factor;
• a feedback stage, implementing a first feedback loop, coupled to the output amplifier stage and configured to generate the feedback voltage based upon the output voltage;
• and
• a compensation stage, implementing a second feedback loop, coupled in feedback with the output amplifier stage and configured to cause, in response to a variation of the output voltage, a corresponding variation of a first biasing voltage for the output amplifier stage.

A voltage-regulator device comprising:

• an error-amplifier stage having a first input and a second input configured to receive a first reference voltage and a feedback voltage, respectively;
• an output amplifier stage having an input coupled to an output of the error-amplifier stage, the output amplifier stage configured to generate an output voltage related to the first reference voltage by an amplification factor;
• a first feedback loop coupled between an output of the output amplifier stage and the second input of the error-amplifier stage, the first feedback loop configured to generate the feedback voltage based on the output voltage;
• and
• a derivation circuit, implementing a second feedback loop, coupled between the output of the output amplifier stage and the input of the output amplifier stage, the derivation circuit configured to cause a variation of a first biasing voltage of the input of the output amplifier stage in response to a variation of the output voltage.