An integrated circuit comprising: - an output stage circuit for converting a digital input signal into an analog output signal, the output stage circuit comprising: - a digital input node for receiving the digital input signal; - a supply voltage node for receiving a supply voltage signal having a nominal supply voltage level; - a digital to analog convertor responsive to the digital input signal and adapted to produce a converted signal; - an amplifier configured for receiving and amplifying the converted signal, thereby generating the analog output signal; characterised in that - the integrated circuit further comprises a first voltage regulator adapted for generating a first voltage signal having a nominal first voltage level lower than the nominal supply voltage level, and for storing energy on a first capacitor at the nominal first voltage level; and - the integrated circuit further comprises a second voltage regulator, adapted for generating a second voltage signal having a nominal second voltage level lower than the nominal first voltage level; and - the digital to analog convertor is configured for producing the converted signal based on a plurality of at least two voltage signals derived from the supply voltage, including at least the second voltage signal; and - the output stage circuit further comprises a greatest-voltage selector circuit adapted for selecting a signal having a largest voltage level amongst a plurality of at least two signals including the supply voltage signal and the first voltage signal, and for providing the selected signal as a power signal to the amplifier. - an output stage circuit for converting a digital input signal into an analog output signal, the output stage circuit comprising: - a digital input node for receiving the digital input signal; - a supply voltage node for receiving a supply voltage signal having a nominal supply voltage level; - a digital to analog convertor responsive to the digital input signal and adapted to produce a converted signal; - an amplifier configured for receiving and amplifying the converted signal, thereby generating the analog output signal; characterised in that - the integrated circuit further comprises a first voltage regulator adapted for generating a first voltage signal having a nominal first voltage level lower than the nominal supply voltage level, and for storing energy on a first capacitor at the nominal first voltage level; and - the integrated circuit further comprises a second voltage regulator, adapted for generating a second voltage signal having a nominal second voltage level lower than the nominal first voltage level; and - the digital to analog convertor is configured for producing the converted signal based on a plurality of at least two voltage signals derived from the supply voltage, including at least the second voltage signal; and - the output stage circuit further comprises a greatest-voltage selector circuit adapted for selecting a signal having a largest voltage level amongst a plurality of at least two signals including the supply voltage signal and the first voltage signal, and for providing the selected signal as a power signal to the amplifier. - a digital input node for receiving the digital input signal; - a supply voltage node for receiving a supply voltage signal having a nominal supply voltage level; - a digital to analog convertor responsive to the digital input signal and adapted to produce a converted signal; - an amplifier configured for receiving and amplifying the converted signal, thereby generating the analog output signal; characterised in that - the integrated circuit further comprises a first voltage regulator adapted for generating a first voltage signal having a nominal first voltage level lower than the nominal supply voltage level, and for storing energy on a first capacitor at the nominal first voltage level; and - the integrated circuit further comprises a second voltage regulator, adapted for generating a second voltage signal having a nominal second voltage level lower than the nominal first voltage level; and - the digital to analog convertor is configured for producing the converted signal based on a plurality of at least two voltage signals derived from the supply voltage, including at least the second voltage signal; and - the output stage circuit further comprises a greatest-voltage selector circuit adapted for selecting a signal having a largest voltage level amongst a plurality of at least two signals including the supply voltage signal and the first voltage signal, and for providing the selected signal as a power signal to the amplifier.