我看了手册,确实可以不加 Enable terminal, with internal pull-up current source. Pull below 1.2 V to disable. Float to enable. Adjust theinput undervoltage lockout with two resistors. See the Enable and Adjusting Undervoltage Lockout section,原文里写了,EN脚内部上拉了,R1,R2可以实现欠压保护,EN低于1.2V芯片无法使能。
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