Voltage regulator
AssigneeSTMicroelectronics S.r.l.
InventorsMichele Placa, Ignazio Martines, Michelangelo Pisasale
Life of this patent
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Abstract
A voltage regulator may include an output stage controlled by a control voltage determined as a function of the difference between a reference voltage and a signal representing an output voltage of the regulator generating the output voltage on an output node of the regulator. An auxiliary stage may be connected in parallel to the output stage and cooperate therewith in supplying a load connected to the regulator. A sensing resistance may be connected in series with the output stage, and an voltage drop amplifier may be connected to the sensing resistance to generate a second control voltage of the auxiliary stage.
Claims20
1-9. (canceled)
A voltage regulator comprising:
- an output stage for generating an output voltage on an output node of the voltage regulator, said output stage being controlled by a first control voltage;
- an auxiliary stage connected in parallel with said output stage and cooperating therewith to supply a load, said auxiliary stage being controlled by a second control voltage;
- a sensing resistor connected in series with said output stage;
- and
- a voltage drop amplifier having an input connected to said sensing resistor and generating the second control voltage.
A voltage regulator comprising:
- an output stage for generating an output voltage on an output node of the voltage regulator, said output stage being controlled by a first control voltage;
- an auxiliary stage connected to said output stage and cooperating therewith to supply a load, said auxiliary stage being controlled by a second control voltage;
- a sensing resistor connected to said output stage;
- and
- a voltage drop amplifier having an input connected to said sensing resistor and generating the second control voltage.
A method for supplying a load comprising:
- generating an output voltage on an output node with an output stage based upon a first control voltage;
- connecting a sensing resistor to the output stage;
- generating a second control voltage using a voltage drop amplifier having an input connected to the sensing resistor;
- and
- controlling an auxiliary stage with the second control voltage so that the auxiliary stage cooperates with the output stage to supply the load.
Dependencies are inferred from the claim text.