Patent ID: 8013642

Claim:
An output drive circuit comprising: a totem-pole-type output part that drives a load connected to a first node, the totem-pole-type output part comprising: a high-side transistor with a drain and a source, an output stage power supply voltage being applied to the drain, and the source being connected to the first node; and a low-side transistor with a source and a drain, a ground voltage being applied to the source, and the drain being connected to the first node; and a bootstrap part comprising a capacitive element that supplies electrical charge to a gate of the high-side transistor when the high-side transistor is in an On-state, the electrical charge being charged when the high-side transistor is in an Off-state, and one terminal of the bootstrap part being connected to the first node, the output drive circuit further comprising: a first switch that becomes a conductive state when the high-side transistor is to be turned on, the first switch being connected between a drive circuit power supply voltage and the gate of the high-side transistor; and a second switch that becomes a conductive state when the high-side transistor is to be turned on, the second switch being connected between the other terminal of the capacitive element and the gate of the high-side transistor, wherein the first switch includes a first transistor and the second switch includes a second transistor, and wherein the first transistor constitutes a current mirror using a third transistor as an input-side transistor, and feeds a current according to a current flowing the third transistor when in a conductive state.