FIG. 2 is a circuit diagram exemplifying a conventional
DC/DC converter that accompanies a peak current control. A feedback ampli?er (error ampli?er) 1 generates a control signal Icml for controlling the electric current ?oWing into an inductor L based on a difference betWeen a voltage obtained by dividing an output voltage VOW With resistors R1 and R2 and a reference voltage Vref. The level of the control signal 1cm, rises With the decrease of the output voltage V and falls With the increase of the output voltage V0,”.