In an embodiment, a method includes receiving, between a positive input terminal and a negative input terminal, a supply voltage, receiving a data signal, generating, by a voltage generator in a branch of a plurality of branches, a branch current as a function of a respective driving signal and of a regulated voltage, each branch connected between the positive input terminal and the negative input terminal, selectively activating the voltage generator as a function of a respective enabling signal and providing, between a positive output terminal and a negative output terminal, the regulated voltage to one or more driving circuits.