CONSTANT VOLTAGE POWER SOURCE CIRCUIT AND SEMICONDUCTOR DEVICE COMPRISING THE SAME

• Main Authors: DAITO MUTSUO, NAKAI TATSUYA
• Format: Patent
• Language: English; Japanese
• Published: 20.08.2020
• Subjects: CONTROLLING; PHYSICS; REGULATING; SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES

To provide a constant voltage power source circuit which can prevent an output voltage from varying due to a pseudo load current.SOLUTION: A constant voltage power source circuit 1 comprises a pseudo load circuit 12 which generates a monitor current I5 with a value corresponding to a current I1 flowing in an output transistor P1 and causes a pseudo load current I3 with a value corresponding to difference between a bias current IB with a fixed value and the monitor current I5 to flow out from an output terminal T3. Consequently, an output voltage VO can be prevented from varying due to the pseudo load current I3 because the pseudo load current I3 continuously linearly varies.SELECTED DRAWING: Figure 1 【課題】疑似負荷電流によって出力電圧が変動することを防止できる定電圧電源回路を提供する。【解決手段】定電圧電源回路１は、出力トランジスタＰ１に流れる電流Ｉ１に応じた値のモニタ電流Ｉ５を生成し、一定値のバイアス電流ＩＢとモニタ電流Ｉ５との差に応じた値の疑似負荷電流Ｉ３を出力端子Ｔ３から流出させる疑似負荷回路１２を備える。したがって、疑似負荷電流Ｉ３は連続的に線形に変化するので、疑似負荷電流Ｉ３によって出力電圧ＶＯが変動することを防止できる。【選択図】図１