Boost converter comprising - an input comprising a first input connection and a second input connection for applying an input voltage (U E); - an output comprising a first output connection and a second output connection for providing an output voltage (U A); - a boost inductor; - a boost diode, wherein the boost inductor and the boost diode are coupled in series between the first input connection and the first output connection; - a boost switch, which is coupled between the node between the boost inductor and the boost diode on one side and the second input connection on the other side; - a boost capacitor, which is coupled between the first output connection and the second output connection; and - a control apparatus, which is designed to provide an actuation signal for actuating the boost switch at the output (A S) of said control apparatus, wherein the control apparatus comprises a first input (E A), to which a signal is coupled, which signal is correlated with the output voltage (U A), wherein the control apparatus comprises a control amplifier having a transfer function which has a nonlinearity in the region of the setpoint value of the output voltage (U A); characterized in that the control amplifier comprises a current mirror (T13, T14), wherein the transfer function is correlated with the ratio of the output current of the current mirror (T13, T14) to the output voltage (U A) of the boost converter, and in that the control apparatus comprises a first further inverter (IC1-D), whose input is coupled to the tap of a voltage divider, which comprises a zener diode and at least one ohmic resistor and is coupled between the first output connection and the second output connection, wherein the series circuit comprising a further zener diode and an ohmic resistor is coupled between the output of the first further inverter (IC1-D) and a reference potential, wherein the node between the further zener diode and the ohmic resistor is coupled to the output (As) of the control apparatus. - an input comprising a first input connection and a second input connection for applying an input voltage (U E); - an output comprising a first output connection and a second output connection for providing an output voltage (U A); - a boost inductor; - a boost diode, wherein the boost inductor and the boost diode are coupled in series between the first input connection and the first output connection; - a boost switch, which is coupled between the node between the boost inductor and the boost diode on one side and the second input connection on the other side; - a boost capacitor, which is coupled between the first output connection and the second output connection; and - a control apparatus, which is designed to provide an actuation signal for actuating the boost switch at the output (A S) of said control apparatus, wherein the control apparatus comprises a first input (E A), to which a signal is coupled, which signal is correlated with the output voltage (U A), wherein the control apparatus comprises a control amplifier having a transfer function which has a nonlinearity in the region of the setpoint value of the output voltage (U A); characterized in that the control amplifier comprises a current mirror (T13, T14), wherein the transfer function is correlated with the ratio of the output current of the current mirror (T13, T14) to the output voltage (U A) of the boost converter, and in that the control apparatus comprises a first further inverter (IC1-D), whose input is coupled to the tap of a voltage divider, which comprises a zener diode and at least one ohmic resistor and is coupled between the first output connection and the second output connection, wherein the series circuit comprising a further zener diode and an ohmic resistor is coupled between the output of the first further inverter (IC1-D) and a reference potential, wherein the node between the further zener diode and the ohmic resistor is coupled to the output (As) of the control apparatus.