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通常,负载开关IC在CONTROL端和GND端子之间会有一个下拉电阻,用于在CONTROL终端开路的情况下使其内部电路保持稳定。如图1所示,东芝的负载开关IC采用MOSFET而非电阻器,用于减小控制下拉电流(ICT)。如图2所示,此MOSFET以几乎恒定的灌电流将CONTROL信号下拉至GND。