Linear regulator circuit

A linear regulator circuit, comprising:

• a power switch having a first terminal coupled to an input voltage, a second terminal coupled to an output voltage, and a control terminal;
• an error amplifier, controlling the control terminal of the power switch according to a comparison between a feedback signal related to the output voltage and a reference signal;
• a first node, coupled between the error amplifier and the control terminal of the power switch;
• a transistor, coupled to the first node to provide a current path;
• and
• a body control unit, coupled between the input voltage and a body of the transistor, wherein when a change occurs in the input voltage, the body control unit controls a body voltage of the transistor such that the body voltage is adjusted to adjust a current in the current path, to correspondingly control a voltage of the first node, such that the control terminal of the power switch responds to the change.