公开(公告)号：EP2952995A1

公开(公告)日：2015-12-09

申请号：EP14171088.9

申请日：2014-06-04

申请人： Dialog Semiconductor (UK) Limited

发明人： Drebinger, Stephan ,  Curra, Roberto

IPC分类号： G05F1/575 ,  H03F3/34

CPC分类号： G05F1/575 ,  H03F3/34 ,  H03F3/45183 ,  H03F2200/297 ,  H03F2203/45301 ,  H03F2203/45674

摘要： The present document relates to amplifiers, notably multi-stage amplifiers, such as linear regulators or linear voltage regulators (e.g. low-dropout regulators) configured to provide a constant output voltage subject to load transients. An amplifier (300) is described. The amplifier (300) comprises a first amplification stage (302) configured to provide an intermediate voltage, based on an outer feedback voltage (107) and based on a reference voltage (108). Furthermore, the amplifier (300) comprises an output stage (301) configured to provide a load current at an output voltage (305) based on the intermediate voltage (528). In addition, the amplifier (300) comprises an outer feedback circuit (104) configured to derive the outer feedback voltage (107) from the output voltage (305). The output stage (301) comprises a buffer (301) configured to provide a drive voltage based on the intermediate voltage (528) and based on an inner feedback voltage derived from the output voltage (305). The buffer (301) comprises a pass device (201) which is configured to provide the load current (527) at the output voltage (305) based on the drive voltage.

摘要翻译： 本文件涉及放大器，特别是多级放大器，例如线性稳压器或线性稳压器（例如低压差稳压器），其被配置为提供经受负载瞬变的恒定输出电压。 描述放大器（300）。 放大器（300）包括第一放大级（302），其被配置为基于外部反馈电压（107）和基于参考电压（108）提供中间电压。 此外，放大器（300）包括被配置为基于中间电压（528）在输出电压（305）提供负载电流的输出级（301）。 此外，放大器（300）包括被配置为从输出电压（305）导出外部反馈电压（107）的外部反馈电路（104）。 输出级（301）包括缓冲器（301），其被配置为基于中间电压（528）提供驱动电压并且基于从输出电压（305）导出的内部反馈电压。 缓冲器（301）包括通过装置（201），其被配置为基于驱动电压提供输出电压（305）处的负载电流（527）。