REGULATOR, MEMORY SYSTEM HAVING THE SAME, AND OPERATING METHOD THEREOF

A regulator includes: a comparator for generating a comparison signal by comparing a feedback voltage obtained by dividing an output voltage with a reference voltage; a current supply switch for controlling a current amount of a pump voltage applied to a first node in response to the output voltage; a control circuit for controlling a potential of an internal node in response to the comparison signal; and a current supply circuit for supplying a current through the first node and to apply the current to the internal node, and generating the output voltage by controlling an amount of current applied to an output node according to a potential level of the internal node.