Input/output device, low dropout regulator circuit and operating method thereof

The embodiment of the invention discloses an input/output device, a low dropout regulator circuit and an operation method thereof. The low dropout regulator circuit includes a voltage divider circuit configured to generate a feedback voltage according to an output voltage, an operational amplifier configured to output a drive signal according to the feedback voltage and a reference voltage, and a transfer gate circuit including a plurality of current paths. A current path is controlled by the drive signal and is connected in parallel between the voltage divider circuit and the power supply reference node. 本发明的实施例公开了输入/输出器件、低压差稳压器电路及其操作方法。该低压差稳压器电路包括被配置为根据输出电压生成反馈电压的分压器电路、被配置为根据反馈电压和参考电压输出驱动信号的运算放大器以及包括多个电流路径的传输门电路。电流路径由驱动信号控制并且并联在分压器电路和电源参考节点之间。