公开(公告)号：US20160211751A1

公开(公告)日：2016-07-21

申请号：US15000683

申请日：2016-01-19

Applicant: Seiko Instruments Inc.

Inventor： Tadashi KUROZO ,  Takao NAKASHIMO ,  Michiyasu DEGUCHI

IPC: H02M3/158 ,  H02M1/32

CPC classification number: G05F1/569 ,  G05F1/573

Abstract: Provided is a voltage regulator having a simple circuit configuration in which a protection circuit is not erroneously operated, and delay time of activation of the protection circuit is short. The voltage regulator includes: a protection circuit configured to control an output transistor when an abnormality of the voltage regulator is detected; a first constant current circuit configured to supply operating current to the protection circuit; and a detection circuit configured to detect output current flowing through the output transistor, to thereby control the first constant current circuit. The detection circuit is further configured to detect the output current with a predetermined reference current value. The protection circuit is further configured to control the output transistor so that the output current does not fall below the reference current value.

Abstract translation: 提供一种电压调节器，其具有简单的电路结构，其中保护电路不被错误地操作，并且保护电路的启动的延迟时间短。 电压调节器包括：保护电路，被配置为当检测到电压调节器的异常时控制输出晶体管; 配置为向保护电路提供工作电流的第一恒流电路; 以及检测电路，被配置为检测流过所述输出晶体管的输出电流，从而控制所述第一恒流电路。 检测电路还被配置为以预定的参考电流值检测输出电流。 保护电路还被配置为控制输出晶体管，使得输出电流不低于参考电流值。

公开(公告)号：US20150177752A1

公开(公告)日：2015-06-25

申请号：US14639681

申请日：2015-03-05

Applicant: Seiko Instruments Inc.

Inventor： Takao NAKASHIMO ,  Tadashi KUROZO

IPC: G05F1/10 ,  H02M1/32

CPC classification number: G05F1/10 ,  G05F1/56 ,  G05F1/575 ,  H02M1/32

Abstract: Provided is a voltage regulator that is low in current consumption and is capable of suppressing the occurrence of an excessive overshoot at an output terminal when a power supply voltage becomes high in a non-regulated state. The voltage regulator includes: an overshoot limiting circuit for detecting an occurrence of an overshoot in an output voltage and limiting a current of the output transistor; and a non-regulated state detection circuit for detecting a non-regulated state of the voltage regulator based on a voltage of an output terminal and a current flowing through the output transistor. The overshoot limiting circuit has an operating current controlled by a detection signal of the non-regulated state detection circuit.

Abstract translation: 提供一种电流消耗低的电压调节器，并且能够抑制在非调节状态下电源电压变高时输出端子发生过大的过冲。 电压调节器包括：过冲限制电路，用于检测输出电压中的过冲的发生并限制输出晶体管的电流; 以及非调节状态检测电路，用于基于输出端子的电压和流过输出晶体管的电流来检测电压调节器的非调节状态。 过冲限制电路具有由非调节状态检测电路的检测信号控制的工作电流。

公开(公告)号：US20160105113A1

公开(公告)日：2016-04-14

申请号：US14969688

申请日：2015-12-15

Applicant: Seiko Instruments Inc.

Inventor： Toshiyuki TSUZAKI ,  Tadashi KUROZO ,  Manabu FUJIMURA

IPC: H02M3/158

CPC classification number: H02M3/158 ,  G05F1/571 ,  G05F1/573 ,  H02M1/32

Abstract: Provided is a voltage regulator capable of stably suppressing overshoot. The voltage regulator includes a non-regulated state detection circuit for detecting a non-regulated state, and an overshoot suppression circuit. The overshoot suppression circuit is configured to operate when the non-regulated state detection circuit detects the non-regulated state.

Abstract translation: 提供能够稳定地抑制过冲的电压调节器。 电压调节器包括用于检测非调节状态的非调节状态检测电路和过冲抑制电路。 超调抑制电路被配置为在非调节状态检测电路检测到非调节状态时动作。

公开(公告)号：US20140354249A1

公开(公告)日：2014-12-04

申请号：US14287999

申请日：2014-05-27

Applicant: Seiko Instruments Inc.

Inventor： Tadashi KUROZO ,  Tomoyuki YOKOYAMA

IPC: H02M1/08

CPC classification number: G05F1/575

Abstract: Provided is a voltage regulator having satisfactory transient response characteristics. The voltage regulator includes: a first amplifier for detecting that undershoot occurs in an output voltage; a second amplifier for detecting that overshoot occurs in the output voltage; a first constant current circuit for increasing a bias current of an error amplifier circuit by a first amount for a first time period in response to a signal determined based on one of an output signal of the first amplifier and an output signal of the second amplifier; a second constant current circuit for increasing the bias current of the error amplifier circuit by a second amount larger than the first amount for a second time period shorter than the first time period in response to a signal determined based on the output signal of the first amplifier; and a first switch circuit for pulling up a gate of an output transistor in response to a signal determined based on the output signal of the second amplifier.

Abstract translation: 提供具有令人满意的瞬态响应特性的电压调节器。 电压调节器包括：用于检测在输出电压中发生下冲的第一放大器; 用于检测在所述输出电压中发生所述过冲的第二放大器; 第一恒流电路，用于响应于基于第一放大器的输出信号和第二放大器的输出信号确定的信号，将误差放大器电路的偏置电流增加第一时间段的第一量; 第二恒定电流电路，用于响应于基于所述第一放大器的输出信号确定的信号，将所述误差放大器电路的偏置电流增加大于所述第一量值的第二量值，所述第二量值比所述第一时间段短的第二时间段 ; 以及第一开关电路，用于响应于基于第二放大器的输出信号确定的信号来提升输出晶体管的栅极。