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[FAQ] LM388x:LM388x 在初始化期间是否可启用外部电源轨?

如数据表的“VFLAG 与 VIN (VCC)”部分所示,当 VCC 超过大约 0.8V 时,FLAG 电压将被拉至低电平。在真正的下拉开始之前,FLAG 电压达到大约 0.65V。如果外部电源轨的使能阈值高于 0.65V,则外部电源轨不应导通。