Semiconductor device

A semiconductor device, comprising:

• a power chip including a switching element that switches a supply of power from a power supply to a load between an on-state and an off-state;
• a control chip in which is incorporated a control circuit that controls the switching element of the power chip;
• and
• a reverse connection protection circuit, provided in the control chip, that controls the switching element of the power chip into an on-state when the power supply is reverse-connected, wherein
• the reverse connection protection circuit has protective resistors, interposed between the control circuit and the positive electrode side of the power supply, and a control voltage formation circuit into which is input an intermediate voltage of the protective resistors and which forms a control voltage that controls the switching element of the power chip into an on-state when the power supply is reverse-connected, and
• the protective resistors are of a configuration wherein the control circuit side is connected to the control chip substrate, and a substrate potential is provided.