An actuation circuit is provided for a switch controlling the power
consumption in a switch-mode converter which has input terminals for
applying an input voltage and output terminals for providing an output
voltage. The actuation circuit comprises a first input for supplying a
voltage measurement signal which is dependent on the output voltage, an
error signal generation circuit which generates an error signal by
comparing the voltage measurement signal with a reference signal, a
filter arrangement which is supplied with the error signal and which
generates a first control signal, and an actuation signal generation
circuit which is supplied with the first control signal and which
provides an actuation signal for the switch on the basis of the first
control signal. The filter arrangement comprises a first filter with an
integrating response which generates a first filter signal on the basis
of the error signal, a second filter which generates a second filter
signal from the error signal in accordance with a hysteresis
characteristic, and a combinational logic circuit which generates the
first control signal from the first and second filter signals.