Patent ID: 8004809

Claim:
A semiconductor integrated circuit device, comprising: a first field effect transistor formed on a main surface of a semiconductor substrate; an overcurrent detection circuit which detects an overcurrent of the first field effect transistor; and an overcurrent limitation circuit that is connected between a gate electrode terminal and a source electrode terminal of the first field effect transistor, controls a detected current of the overcurrent detection circuit, and has an output voltage that varies according to a variation of a threshold voltage of the first field effect transistor, wherein the overcurrent detection circuit comprises: a third resistance element and a fourth resistance element that detect the overcurrent of the first field effect transistor, and are connected to each other in series; and a second field effect transistor whose gate electrode is connected to a connection point between the third resistance element and the fourth resistance element, wherein the overcurrent limitation circuit comprises: a first resistance element and a series circuit that are connected between the gate electrode terminal and the source electrode terminal of the first field effect transistor, and are connected to each other in series; and a third field effect transistor whose gate electrode is connected to a connection point between the first resistance element and the series circuit, and that is cascade connected to the second field effect transistor between the gate electrode terminal and the source electrode terminal of the first field effect transistor, and wherein the series circuit includes a second resistance element and “N” diode(s) (“N” is an integer of one or more) that is to be in a forward direction connected in a series form, the diode(s) is(are) arranged to compensate a temperature dependency of the third field effect transistor.