A regulator circuit to regulate an output voltage (Vout) comprising: an error amplifier configured to compare a feedback voltage (Vo_div) corresponding to the output voltage to a reference voltage (Vref) and output an error voltage; a buffer circuit comprising: a first transistor having a control terminal, a first terminal, and a second terminal and being a first polarity, wherein the control terminal of the first transistor receives the error signal as an input signal; a second transistor having a control terminal, a first terminal, and a second terminal and being a second polarity, wherein the control terminal of the second transistor is connected to the second terminal of the first transistor; a voltage shift circuit (202, R B, M2) having first terminal connected to the first terminal of the first transistor and a second terminal connected to the first terminal of the second transistor, wherein a voltage between the first terminal of the voltage shift circuit and the second terminal of the voltage shift circuit increases as a current from the second terminal of the voltage shift circuit increases; and a pass transistor (100, Mp) having a control terminal, a first terminal, and a second terminal, wherein the control terminal is connected to the first terminal of the second transistor, wherein the second terminal of the voltage shift circuit drives the control terminal of the pass transistor to regulate the output voltage of the regulator at the second terminal of the pass transistor. an error amplifier configured to compare a feedback voltage (Vo_div) corresponding to the output voltage to a reference voltage (Vref) and output an error voltage; a buffer circuit comprising: a first transistor having a control terminal, a first terminal, and a second terminal and being a first polarity, wherein the control terminal of the first transistor receives the error signal as an input signal; a second transistor having a control terminal, a first terminal, and a second terminal and being a second polarity, wherein the control terminal of the second transistor is connected to the second terminal of the first transistor; a voltage shift circuit (202, R B, M2) having first terminal connected to the first terminal of the first transistor and a second terminal connected to the first terminal of the second transistor, wherein a voltage between the first terminal of the voltage shift circuit and the second terminal of the voltage shift circuit increases as a current from the second terminal of the voltage shift circuit increases; and a first transistor having a control terminal, a first terminal, and a second terminal and being a first polarity, wherein the control terminal of the first transistor receives the error signal as an input signal; a second transistor having a control terminal, a first terminal, and a second terminal and being a second polarity, wherein the control terminal of the second transistor is connected to the second terminal of the first transistor; a voltage shift circuit (202, R B, M2) having first terminal connected to the first terminal of the first transistor and a second terminal connected to the first terminal of the second transistor, wherein a voltage between the first terminal of the voltage shift circuit and the second terminal of the voltage shift circuit increases as a current from the second terminal of the voltage shift circuit increases; and a pass transistor (100, Mp) having a control terminal, a first terminal, and a second terminal, wherein the control terminal is connected to the first terminal of the second transistor, wherein the second terminal of the voltage shift circuit drives the control terminal of the pass transistor to regulate the output voltage of the regulator at the second terminal of the pass transistor.