Patent ID: 8605399
Filing Date: 2013-12-10
Classification: H03K

Abstract:
1. A load driving device, comprising: an output transistor of a vertical-type MOS transistor formed in a semiconductor body, the output transistor comprising a first terminal, a second terminal, and a control terminal; a reverse connection protection transistor of a lateral-type MOS transistor formed in a well region which is formed in the semiconductor body, the reverse connection protection transistor comprising a first terminal coupled with the control gate of the output transistor, a second terminal, and a control terminal; a first power supply terminal coupled with the first terminal of the output transistor via the semiconductor body; an output terminal coupled with the second terminal of the output transistor, the output terminal being provided for coupling with an external load; and a second power supply terminal coupled with the second terminal and the control terminal of the reverse connection protection transistor, wherein the reverse connection protection transistor turns on and couples the control gate of the output transistor with the second power supply terminal when a polarity of a power supply connected between the first and second power supply terminals is reversed.