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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
Inventor: CHI RIAN CHIEN , SAN HOO DON , HIYUN JIYON SHIN
IPC: G11C11/407 , G05F1/56 , H02M3/07
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.