| 摘要 |
PROBLEM TO BE SOLVED: To provide a voltage regulator using an NMOS transistor for an output transistor with low power consumption.SOLUTION: A voltage regulator comprises: an NMOS transistor 104 as an output transistor; an error amplifier circuit 103; resistances 105 and 106; a reference voltage circuit 102; a ground terminal 100; an output terminal 110; and a power supply terminal 101. The error amplifier circuit 103 is configured such that a non-inverting input terminal is connected to one terminal of the reference voltage circuit 102, and that an inverting input terminal is connected to a connection point between the resistances 105 and 106. The NMOS transistor 104 is configured such that a gate is connected to the output terminal of the error amplifier circuit 104, and that a source is connected to the output terminal 110, and that a drain is connected to a step-down circuit 107. The other terminal of the step-down circuit 107 is connected to the power supply terminal 101. The resistances 105 and 106 are connected between the output terminal 110 and the ground terminal 100. |
