The present invention relates to a method for controlling the supply voltage for an integrated circuit, which is connected to a voltage regulation module via a sense line, a voltage supply line and a bus wherein the supply voltage is provided by the voltage regulation module (10) via the voltage supply line. The supply voltage is composed of a reference voltage and a number of additional voltage levels. The reference voltage is defined by a voltage source and controlled by the integrated circuit via the bus, and the number of additional voltage levels is determined by the integrated circuit and send to the voltage regulation module via the sense line. Further the present invention relates to a corresponding apparatus with a voltage regulation module and an integrated circuit.