Patent ID: 6967470

Claim:
A voltage regulator comprising: a series type regulator which is supplied with a first reference voltage and a first voltage, and which is coupled to an output node, wherein the series type regulator comprises: a first amplification circuit which amplifies a first voltage difference between the first reference voltage and the first voltage; and a first transistor which is coupled between a first node and the output node and which is supplied with the amplified first voltage difference; and a shunt type regulator which is supplied with a second reference voltage and a second voltage, and which is coupled to the output node, wherein the shunt type regulator comprises: a constant current source which is coupled between the first node and the output node and which supplies a constant current to the output node; a second amplification circuit which amplifies a second voltage difference between the second voltage and the second reference voltage; and a second transistor which is coupled between the output node and a second node and which is supplied with the amplified second voltage difference.