The invention relates to a DC-
DC voltage converter (1), having a
transformer (2) having a primary winding (2a) and a secondary winding (2b, 2c) having a centre tap, an output
inductor (3), which is connected to the centre tap and to a first output connection (9a), a
synchronous rectifier circuit (4) having two
synchronous rectifier switches (14a, 14b), each of which is connected to the terminal taps of the secondary winding (2b, 2c), and which are designed to produce a rectified output
voltage on a second output connection (9b), and a
snubber circuit (5) that is switched by means of the
synchronous rectifier circuit (4). In this case, the
snubber circuit has two diodes (16a, 16b), each of which is coupled to the terminal taps of the secondary winding (2b, 2c), a
capacitor (6), which is coupled to the two diodes (16a, 16b) and which is designed to store resonant oscillation energy arising in the synchronous
rectifier circuit (4), and a
discharge circuit (7) comprising a series circuit containing a
discharge switch (18) and a
resistor (17), wherein the
discharge circuit (7) is coupled between the first output connection (9a) and the
capacitor and is designed to selectively feed back stored charge in the
capacitor (6) to the first output connection (9a).