1.请问EN管脚拉成低电平后，进去Shutdown模式是否还有电压输出？
2.按照资料所说，应该没有电压才对，为何在EN脚拉成低电平后还有3.4V的电压输出？
3.我们采用的资料上推荐的电路，在EN脚置高电平，输出9V电压且带载正常。为何置低时就无法完全关断呢？请哪位高手帮忙指点下。
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