Capacitor-less voltage regulator, semiconductor device including the same and method of generating power supply voltage

A semiconductor device comprising:

• a functional circuit configured to operate based on an output power supply voltage;
• a voltage regulator configured to,
• generate the output power supply voltage based on an input power supply voltage and an input reference voltage,
• generate a sink current in response to a sink enable signal while the functional circuit is not driven, and
• block generation of the sink current in response to an operating enable signal while the functional circuit is driven;
• and
• a controller configured to control the functional circuit and the voltage regulator,
• wherein the sink current corresponds to a load current that is to be consumed while the functional circuit is driven.

A method of generating a power supply voltage, the method comprising:

• generating an output power supply voltage based on an input power supply voltage and an input reference voltage and providing the output power supply voltage to an external functional circuit;
• generating a sink current in response to a sink enable signal while the external functional circuit is not driven;
• and
• blocking generation of the sink current in response to an operating enable signal while the external functional circuit is driven,
• wherein the sink current corresponds to a load current that is to be consumed while the external functional circuit is driven.