A converter for selectively converting an input voltage into at least first and second different output voltages, the converter comprising a selection circuit configured to switch between using a first and at least a second (110, 120; 210, 220) electronic circuit, the first and second electronic circuits enabling the first and second electrical output voltages to be supplied respectively, comprises at least part of the first electronic circuit , the first electronic circuit comprising an input terminal, a first inductor (L1) connecting the input terminal to a first node (N1), a first capacitor (C1), the terminals of which connect the first node (N1) to a second node (N2), a first diode (D1), the anode of which is connected to the second node (N2) and the cathode of which is connected to the first node (N1), a second inductor (D2), the terminals of which connect the first node (N1) to the second node (N2) and the cathode of which is connected to the second node (N2). connected to a third node (N3), the third node (N3) being connected to an output terminal of the converter , a first switch (Q1) connecting the first node (N1) earth, a second inductor (L2) connecting the second node (N2) to earth via the selection circuit, and a second capacitor (C2) connecting the third node (N3) to earth, characterised in that the second electronic circuit comprises the first electronic circuit, and further comprising a fourth node (N4) located between the second inductor (L2) and earth, a second diode (D2) whose anode is connected to the first node (N1) and whose cathode is connected to the fourth node (N4), and a third capacitor (C3) connecting the fourth node (N4) to earth. the converter comprising a selection circuit configured to switch between using a first and at least a second (110, 120; 210, 220) electronic circuit, the first and second electronic circuits enabling the first and second electrical output voltages to be supplied respectively, comprises at least part of the first electronic circuit , the first electronic circuit comprising an input terminal, a first inductor (L1) connecting the input terminal to a first node (N1), a first capacitor (C1), the terminals of which connect the first node (N1) to a second node (N2), a first diode (D1), the anode of which is connected to the second node (N2) and the cathode of which is connected to the first node (N1), a second inductor (D2), the terminals of which connect the first node (N1) to the second node (N2) and the cathode of which is connected to the second node (N2). connected to a third node (N3), the third node (N3) being connected to an output terminal of the converter , a first switch (Q1) connecting the first node (N1) earth, a second inductor (L2) connecting the second node (N2) to earth via the selection circuit, and a second capacitor (C2) connecting the third node (N3) to earth, characterised in that the second electronic circuit comprises the first electronic circuit, and further comprising a fourth node (N4) located between the second inductor (L2) and earth, a second diode (D2) whose anode is connected to the first node (N1) and whose cathode is connected to the fourth node (N4), and a third capacitor (C3) connecting the fourth node (N4) to earth. <EOS>