External regulator reference voltage generator circuit

Disclosed is an external regulator reference voltage generator circuit that precisely controls the supply voltage applied to core logic to optimize the operational characteristics of the core logic 120 without using excessive power. An adaptive voltage and scaling optimization circuit 124 is used to detect the operating parameters of the core logic 120 and generate a voltage control signal to control a reference voltage regulator. The reference voltage regulator generates a regulator reference voltage in response to the voltage control signal that controls an external regulator which, in turn, generates the supply voltage.