公开(公告)号：US09236732B2

公开(公告)日：2016-01-12

申请号：US14033137

申请日：2013-09-20

Applicant: Seiko Instruments Inc.

Inventor： Takashi Matsuda ,  Fumimasa Azuma

IPC: G05F1/00 ,  H02H9/04 ,  G05F1/56

CPC classification number: H02H9/04 ,  G05F1/56 ,  G05F1/562

Abstract: Provided is a voltage regulator capable of suppressing an overshoot with low current consumption. A comparator of an overshoot detection circuit is activated only when a power supply fluctuation occurs, and the comparator outputs a signal for reducing an overshoot occurring in an output voltage. In a steady state, the comparator of the overshoot detection circuit is turned off to prevent the current from being consumed.

Abstract translation: 提供了能够以低电流消耗抑制过冲的电压调节器。 只有当电源变化发生时，过冲检测电路的比较器才被激活，并且比较器输出用于减小在输出电压中发生的过冲的信号。 在稳定状态下，过冲检测电路的比较器被关断以防止电流被消耗。

公开(公告)号：US09348350B2

公开(公告)日：2016-05-24

申请号：US14465327

申请日：2014-08-21

Applicant: Seiko Instruments Inc.

Inventor： Fumimasa Azuma

IPC: H02H9/02 ,  G05F1/573

CPC classification number: G05F1/573 ,  H02H9/025

Abstract: Provided is a voltage regulator including an overcurrent protection circuit in which an output voltage-output current characteristic exhibits an optimal fold-back characteristic even when an overcurrent state is detected. The overcurrent protection circuit includes a control circuit for generating a current in accordance with an output voltage, and controls a gate of an output transistor with use of a current obtained by subtracting the current from a sense current flowing in accordance with an output current.

Abstract translation: 提供了一种包括过电流保护电路的电压调节器，其中即使当检测到过电流状态时，输出电压 - 输出电流特性也表现出最佳的折回特性。 过电流保护电路包括用于根据输出电压产生电流的控制电路，并且使用通过从根据输出电流流动的感测电流减去电流而获得的电流来控制输出晶体管的栅极。

公开(公告)号：US09819173B2

公开(公告)日：2017-11-14

申请号：US14656196

申请日：2015-03-12

Applicant: Seiko Instruments Inc.

Inventor： Daiki Endo ,  Fumimasa Azuma

IPC: H02H5/04 ,  H02H7/12 ,  G05F1/567

CPC classification number: H02H5/044 ,  G05F1/567

Abstract: To provide an overheat protection circuit which is not affected by a leak current while being low in current consumption and good in detection accuracy, and a voltage regulator equipped with the overheat protection circuit. An overheat protection circuit is configured to include a leak current detection circuit which detects that a leak current has flowed at a high temperature, a bias circuit which allows a bias current to flow in response to an output signal of the leak current detection circuit, and a temperature detection circuit operated by the bias current.