US 12,468,326 B2
Voltage regulator
Atsushi Haruyama, Nagano (JP); Yasuhiko Ogura, Nagano (JP); and Teruo Suzuki, Nagano (JP)
Assigned to ABLIC INC., Nagano (JP)
Filed by ABLIC Inc., Nagano (JP)
Filed on Sep. 11, 2023, as Appl. No. 18/464,522.
Claims priority of application No. 2022-156544 (JP), filed on Sep. 29, 2022.
Prior Publication US 2024/0111320 A1, Apr. 4, 2024
Int. Cl. G05F 1/565 (2006.01); G05F 1/56 (2006.01); G05F 1/575 (2006.01)
CPC G05F 1/565 (2013.01) [G05F 1/56 (2013.01); G05F 1/575 (2013.01)] 12 Claims
OG exemplary drawing
 
1. A voltage regulator, comprising:
an output transistor including a control terminal, and being configured to receive a control voltage from the control terminal and supply an output voltage;
an error amplifier circuit configured to supply an amplified signal obtained by amplifying a difference between a voltage based on the output voltage and a reference voltage;
a common source amplifier circuit configured to receive the amplified signal, and to supply the control voltage to the control terminal; and
a non-regulation state detection circuit configured to supply a detection signal including a signal level corresponding to one of a regulation state or a non-regulation state to the common source amplifier circuit,
the common source amplifier circuit including a current control circuit including a plurality of parallel paths each connecting between the control terminal of the output transistor and a first power supply terminal for supplying a first power supply voltage, the parallel paths including a first path to be a closed state in the non-regulation state and a second path to be an opened state in the non-regulation state.