US 12,438,446 B2
Power supply device and semiconductor device
Takayuki Tsukamoto, Yokohama Kanagawa (JP)
Assigned to Kioxia Corporation, Tokyo (JP)
Filed by Kioxia Corporation, Tokyo (JP)
Filed on Aug. 15, 2023, as Appl. No. 18/450,301.
Claims priority of application No. 2022-149914 (JP), filed on Sep. 21, 2022.
Prior Publication US 2024/0097561 A1, Mar. 21, 2024
Int. Cl. H02M 1/36 (2007.01); H02M 1/00 (2007.01); H02M 3/158 (2006.01)
CPC H02M 1/36 (2013.01) [H02M 1/0032 (2021.05); H02M 1/0045 (2021.05); H02M 1/008 (2021.05); H02M 1/009 (2021.05); H02M 3/1584 (2013.01)] 20 Claims
OG exemplary drawing
 
16. A semiconductor device comprising:
a target circuit; and
a power supply device that includes:
a regulator circuit configured to generate a second power supply voltage based on an input first power supply voltage,
a voltage output terminal from which the second power supply voltage is to be output to the target circuit,
a switching circuit that is provided between the regulator circuit and the voltage output terminal and is configured to transition between a first state in which the second power supply voltage is supplied to the voltage output terminal and a second state in which supply of the second power supply voltage to the voltage output terminal is cut off,
a first control circuit configured to output a reset signal that is set to a first voltage or a second voltage different from the first voltage,
a second control circuit configured to be driven by the second power supply voltage and to perform control so that the switching circuit transitions to the first state or the second state when the reset signal is at the first voltage, and
a reset wiring electrically connecting the first control circuit and the switching circuit without passing through the second control circuit, wherein
the switching circuit is configured to transition to the second state regardless of the control by the second control circuit when the reset signal received via the reset wiring is set to the second voltage.