公开(公告)号：EP1865397A1

公开(公告)日：2007-12-12

申请号：EP06300559.9

申请日：2006-06-05

Applicant: ST MICROELECTRONICS S.A.

Inventor： Maige, Philippe ,  Guedon, Yannick

IPC: G05F1/575 ,  G05F1/565

CPC classification number: G05F1/575

Abstract: The invention concerns a low drop-out DC voltage regulator (100) for regulating a voltage from a DC supply (V IN ) comprising: a pass device (102) controllable to maintain a required voltage at an output (106) of the regulator and arranged to provide a first current (I PASS ) from the DC supply, at least part of said first current being provided to a load connected to the output of the regulator; and current regulating means (120) connected to said pass device and to the output of the regulator, said current regulating means arranged to conduct a second current (I A ) controllable such that the first current through said pass device remains constant irrespective of variations in a load current to said load.

Abstract translation: 本发明涉及一种用于调节来自直流电源（V IN）的电压的低压差直流电压调节器（100），包括：通过装置（102），其可控制以在所述调节器的输出端（106）处保持所需电压;以及 布置成从DC电源提供第一电流（I PASS），所述第一电流的至少一部分被提供给连接到调节器的输出的负载; 和电流调节装置（120），其连接到所述通过装置和调节器的输出端，所述电流调节装置被布置成传导可控的第二电流（IA），使得通过所述通过装置的第一电流保持恒定，而与 负载电流到所述负载。