发明名称 |
Voltage regulator with transient response |
摘要 |
A voltage regulator having good transient response characteristics and maintaining stable operation is provided. The voltage regulator includes: a first MOS transistor having a gate terminal connected to an output terminal of the differential amplifier circuit; a first constant current source provided between the first MOS transistor and a ground terminal; an output MOS transistor having a gate terminal connected to a drain terminal of the first MOS transistor via a phase compensation circuit; a second MOS transistor having a gate terminal to which an output of the differential amplifier circuit is input and a drain terminal connected to the gate terminal of the output MOS transistor; and a second constant current source provided between the second MOS transistor and a ground terminal. |
申请公布号 |
US8810219(B2) |
申请公布日期 |
2014.08.19 |
申请号 |
US201213606722 |
申请日期 |
2012.09.07 |
申请人 |
Seiko Instruments Inc. |
发明人 |
Suzuki Teruo |
分类号 |
G05F1/10;G05F1/656;G05F1/575 |
主分类号 |
G05F1/10 |
代理机构 |
Brinks Gilson & Lione |
代理人 |
Brinks Gilson & Lione |
主权项 |
1. A voltage regulator comprising:
a differential amplifier circuit which receives an input of a reference voltage output from a reference voltage circuit and an input of a feedback voltage obtained by dividing an output voltage of the voltage regulator and then amplifies and outputs a difference between the reference voltage and the feedback voltage; a first MOS transistor having a gate terminal connected to an output terminal of the differential amplifier circuit; a first constant current source which is provided between the first MOS transistor and a ground terminal; an output MOS transistor having a gate terminal connected to a drain terminal of the first MOS transistor via a phase compensation circuit; a second MOS transistor having a gate terminal to which an output of the differential amplifier circuit is input and a drain terminal connected to the gate terminal of the output MOS transistor; and a second constant current source provided between the drain terminal of the second MOS transistor and a ground terminal. |
地址 |
Chiba JP |