Switching regulator

A method for controlling starting up of a switching regulator with a first output rail;

• a second output rail, wherein one output rail can be brought to a negative potential and the other output rail to a positive potential;
• a diode connected to an output rail;
• a charging switch connected in series to the diode, wherein the charging switch has a control input by which the charging switch can be opened or closed;
• a capacitor, wherein the regulated output voltage can be tapped at the capacitor;
• an inductance coupled to the diode;
• and a change-over switch controllable to couple the first output rail or the second output rail to the control input of the charging switch in dependence on a change-over control signal, wherein the charging switch is formed to be closed due to a potential at one output rail and to be opened due to a potential at the other output rail, and a control for providing the change-over control signal to close the charging switch, so that the capacitor is charged, and to open the charging switch, so that the capacitor is to be discharged, comprising the steps of:
• applying a direct voltage between an anode of the diode and a terminal of the charging switch, which is not connected to a cathode of the diode;
• supplying the control with the output voltage between the first output rail and the second output rail;
• and
• controlling the change-over switch by the control, when the output voltage has reached a value where the control can operate in an determined way, to connect the change-over switch to the output rail, which is coupled to the cathode of the diode.