Patent ID: 6965218

Claim:
A voltage regulator including a transistor ( 10 ), having a main current path between the input voltage terminal (V in ) of said voltage regulator and the output of said voltage regulator, comprising: an amplifier ( 20 ) having an output being connected to the control terminal ( 16 ) of said transistor ( 10 ) and to the one input ( 22 ) of which a voltage as a function of the output voltage (V out ) of said voltage regulator is applied, a transconductance amplifier ( 30 ) having a output being connected to the other input ( 24 ) of said amplifier ( 20 ), a first resistor (R O1 ), a capacitor (C C ) wherein the one input ( 32 ) of said transconductance amplifier ( 30 ) is connected to a further voltage as a function of said output voltage (V out ) of said voltage regulator whilst the other input ( 34 ) of said transconductance amplifier ( 30 ) is connected to a reference voltage (V ref ) dictating said output voltage (V out ) of said voltage regulator, and a further resistor (R SZ ) is coupled between the one input ( 22 ) and the other input ( 24 ) of said amplifier ( 20 ). wherein the value of said further resistor (R SZ ) is selected to substantially maximize the phase reserve of said voltage regulator.