公开(公告)号：US09256237B2

公开(公告)日：2016-02-09

申请号：US14149410

申请日：2014-01-07

Applicant: Samsung Electronics Co., Ltd.

Inventor： Hyoungrae Kim ,  Dongjin Keum

IPC: G05F1/575 ,  G05F1/56

CPC classification number: G05F1/56 ,  G05F1/575

Abstract: Exemplary embodiments disclose a low drop-out regulator including an error amplification unit which includes a zero compensation circuit configured to compensate a plurality of poles which are generated by an output terminal and a buffer, the error amplification unit is configured to generate a first comparison signal in response to a reference voltage and a feedback voltage, the buffer is configured to generate a second comparison signal in response to the first comparison signal and an input voltage, a pass unit configured to provide an output voltage and a load current to the output terminal in response to the second comparison signal and the input voltage, and a feedback unit configured to provide the feedback voltage to the error amplification unit in response to the output voltage. A driving current of the buffer is independently adjusted with respect to the load current.

Abstract translation: 示例性实施例公开了一种低压差调节器，其包括误差放大单元，该误差放大单元包括零补偿电路，该零补偿电路被配置为补偿由输出端子和缓冲器产生的多个极点，误差放大单元被配置为产生第一比较信号 响应于参考电压和反馈电压，缓冲器被配置为响应于第一比较信号和输入电压而产生第二比较信号，通路单元被配置为向输出端提供输出电压和负载电流 响应于第二比较信号和输入电压，以及反馈单元，被配置为响应于输出电压向误差放大单元提供反馈电压。 相对于负载电流独立地调节缓冲器的驱动电流。