A voltage regulator apparatus (100, 400), comprising: an operational amplifier (105, 405), having a first input terminal coupled to a reference voltage, a second input terminal, and an output terminal; a first resistor, having a first terminal coupled to the second input terminal; a second resistor, coupled between the first resistor and a ground level; a driving transistor (M1, M8) having a control terminal coupled to the output terminal of the operational amplifier (105, 405) and a first terminal coupled to a second terminal of the first resistor; an amplifier circuit (115, 415), coupled to the output terminal of the operational amplifier (105, 405), configured to sense an output voltage of the voltage regulator apparatus (100, 400) to amplify the sensed voltage with a gain to regulate a first transistor of an output circuit (120, 420); and the output circuit (120, 420), having the first transistor having a control terminal controlled by the amplifier circuit (115, 415), wherein the output voltage is generated at a first terminal of the first transistor; characterised in that the amplifier circuit (115, 415) comprises: a second transistor, having a control terminal coupled to the output terminal of the operational amplifier (105, 405), a first terminal coupled to the output voltage, and a second terminal coupled to a first impedance unit; the first impedance unit, coupled between the second transistor and a reference voltage level; wherein the first transistor of the output circuit (120, 420) is controlled according to a signal at an intermediate node between the second transistor and the first impedance unit. an operational amplifier (105, 405), having a first input terminal coupled to a reference voltage, a second input terminal, and an output terminal; a first resistor, having a first terminal coupled to the second input terminal; a second resistor, coupled between the first resistor and a ground level; a driving transistor (M1, M8) having a control terminal coupled to the output terminal of the operational amplifier (105, 405) and a first terminal coupled to a second terminal of the first resistor; an amplifier circuit (115, 415), coupled to the output terminal of the operational amplifier (105, 405), configured to sense an output voltage of the voltage regulator apparatus (100, 400) to amplify the sensed voltage with a gain to regulate a first transistor of an output circuit (120, 420); and the output circuit (120, 420), having the first transistor having a control terminal controlled by the amplifier circuit (115, 415), wherein the output voltage is generated at a first terminal of the first transistor; characterised in that the amplifier circuit (115, 415) comprises: a second transistor, having a control terminal coupled to the output terminal of the operational amplifier (105, 405), a first terminal coupled to the output voltage, and a second terminal coupled to a first impedance unit; the first impedance unit, coupled between the second transistor and a reference voltage level; wherein the first transistor of the output circuit (120, 420) is controlled according to a signal at an intermediate node between the second transistor and the first impedance unit.