ON-CHIP VOLTAGE REGULATOR PROVIDED WITH SMALL-DROPOUT BOOSTING POWER SUPPLY

    公开(公告)号:JPH06169565A

    公开(公告)日:1994-06-14

    申请号:JP35066891

    申请日:1991-12-12

    Applicant: IBM

    Abstract: PURPOSE: To apply differential amplifiers to a small drop-out voltage regulator and improve power source elimination, by connecting a series regulating element with the outputs of the differential amplifiers, making a source-follower and constituting a booster of the differential amplifiers with voltage pump circuits. CONSTITUTION: A series regulating element MN1 connected with the outputs of differential amplifiers MN2-MN4 and MP1-MP2 acts as source-follower. A booster (booster VCC) INT of the differential amplifiers MN2-MN4 and MP1-MP2 is constituted of voltage pump circuits MP4-MP6, CRUMP1-CRUMP2, CSTORE. Gate potentials of the differential amplifiers MN2-MN4 and MP1-MP2 are increased with the voltage pump circuits MP4-MP6, CRUMP1-CRUMP2, CSTORE. Thereby, the differential amplifiers can be applied to a small drop-out voltage regulator, power source elimination can be improved, and lower external power source sensitivity can be obtained.

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