VOLTAGE REGULATOR

To provide a voltage regulator including an overshoot suppression circuit with low current consumption.SOLUTION: The voltage regulator includes: an error amplifier that receives a feedback voltage and a reference voltage and controls a gate voltage of an output transistor; a non-regulation detection...

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Bibliographic Details
Main Author SAKAGUCHI KAORU
Format Patent
LanguageEnglish
Japanese
Published 19.09.2019
Subjects
CONTROLLING
PHYSICS
REGULATING
SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
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Summary:To provide a voltage regulator including an overshoot suppression circuit with low current consumption.SOLUTION: The voltage regulator includes: an error amplifier that receives a feedback voltage and a reference voltage and controls a gate voltage of an output transistor; a non-regulation detection circuit including a differential amplifier circuit that operates with a current corresponding to an output current of the output transistor; and an overshoot suppression circuit having an overshoot detection circuit that enables an overshoot detection operation by a signal from the non-regulation detection circuit indicating that non-regulation is detected.SELECTED DRAWING: Figure 1 【課題】消費電流が小さいオーバーシュート抑制回路を備えたボルテージレギュレータを提供する。【解決手段】帰還電圧と基準電圧が入力され出力トランジスタのゲート電圧を制御する誤差増幅器と、出力トランジスタの出力電流に応じた電流で動作する差動増幅回路を備えた非レギュレーション検出回路と、非レギュレーション検出回路からの非レギュレーションを検出したことを示す信号によってオーバーシュート検出動作を有効にするオーバーシュート検出回路を有するオーバーシュート抑制回路と、を備えた。【選択図】図１
Bibliography:Application Number: JP20180047825