This paper proposes the Low-Dropout regulator including the “load current sensing circuit”. The load current sensing circuit senses the change of the load current and then reduces the ripple of the output voltage. The load transient response characteristic of the Low-Dropout regulator is improved by this method. And this paper uses a body driven technique to enhance the current driving capability for pass transistor. The proposed circuit is simulated by HSPICE with a 0.18um BCD process parameter. In addition, this paper enhances the reliability of IC by equipping the P-substrate triggered SCR type ESD protection device.
