Semiconductor device, control device for transmission, and control method of electronic control unit

Abstract

There is provided a power saving and highly reliable semiconductor device on which a switching power supply circuit and a driver circuit are mounted together, and which can perform appropriate control by the driver circuit even when a battery terminal is disconnected while reducing power loss in the entire semiconductor device. The semiconductor device includes: a first terminal which is connected to a battery power source; a switching power supply circuit which steps down a battery voltage input from the first terminal; a second terminal which is connected to a switching power source different from the battery power source; a regulator circuit which steps down a voltage input from the second terminal; and a predriver circuit which is connected to the regulator circuit.

Dependencies are inferred from the claim text.