Patent ID: 7777468

Claim:
A semiconductor apparatus that serves as a step-down type switching regulator wherein an inductor and a switching transistor are serially connected between an input terminal and an output terminal for stepping down an input voltage provided to the input terminal to a predetermined constant voltage and for providing the constant voltage to an external load from the output terminal, the semiconductor apparatus comprising: a connection point where the switching transistor and the inductor are connected; a P type transistor for rectification that is connected between the connection point and a negative side of a power supply voltage, wherein a control electrode of the P type transistor is connected to the connection point; and a transistor for synchronous rectification connected in parallel with the P type transistor for rectification, wherein a control signal is provided to a control electrode of the transistor for synchronous rectification such that a switching operation that is opposite to an operation of the switching transistor may be performed; wherein the transistor for synchronous rectification is arranged closer to the connection point than the P type transistor for rectification.