Switched mode power supply

Switched mode power supply with a timed switching regulator(1). whereby an electronic switching component (T.sub.1) is periodically switched on and off in such a particular pulse duty ratio, that an output control voltage (U.sub.B) is produced from a rectified input voltage (U.sub.E) across a storage circuit (2) with a smoothing choke (L), an intermediate circuit memory backup capacitor (C.sub.Z), and a free-wheeling diode (D.sub.F) characterized in that, the switching component (T.sub.1) is composed of a transistor, namely an FET or an IGBT, whose base or gate (G) is preconnected to a control circuit (4) in such a way that an increased trigger current briefly flows in the trigger circuit for gating, and a substantially smaller holding current subsequently flows in the gated state, respectively and wherein an active dropping resistor (R.sub.G) is preconnected to the gate (G) of the switching component (T.sub.1), whereby, dynamically at the time when the switching component (T.sub.1) is triggered, the active dropping resistor (R.sub.G) is at least partially bridged by the control circuit (4) in such a way, that the relatively high trigger current flows for this time, while the bridging of the active dropping resistor (R.sub.G) is subsequently raised after the gating of the switching component (T.sub.1), so that the relatively smaller holding current flows.