An electronic converter has first and second input terminals, first and second output terminals, a current regulator circuit arranged between the first input terminal and an intermediate node, and input capacitor arranged between the intermediate node and the second input terminal, and an output capacitor. A control circuit block is configured to sense an input voltage, compare the regulated voltage to a reference value and generate a first signal, compare the input voltage to a lower threshold and an upper threshold and generate a second signal, switch the electronic converter between an active mode and an idle mode as a function of the first signal, and switch the electronic converter between a recharge phase and a switching phase as a function of the second signal when the electronic converter is in the active mode.