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求助，如果我使用一片LM2576HV芯片，设定的输出电压是12V，正常输入电压是24V。在24V系汽车点火瞬间，输入电压被拉低到9V，那么这时候的输出电压会跟随输入电压降低吗？还是说芯片内部有欠压保护，直接关断芯片？
