SEMICONDUCTOR DEVICE

A semiconductor device includes a main switching element, a sense switching element, a sense resistor and an operational amplifier. The main switching element has a first terminal and a second terminal between which a load current flows. The sense switching element is connected to the main switching element to form a current mirror, and has a third terminal and a fourth terminal between which a sense current correlated with the load current flows. The sense resistor is arranged in a feedback path of the operational amplifier. A direction of the sense current flowing through the sense resistor is switchable according to a magnitude relationship between a potential of the first terminal and a potential of the second terminal or a magnitude relationship between the potential of the first terminal and the potential of the fourth terminal.