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LTC3631输出负电压 RUN管脚不可控?



用LTC3631输出-2.8V电压,RUN管脚拉低(测过确实为0)后3631并没有关闭,还能输出-2.8V。
同一块板上的3.3V和+2.8V都能通过RUN控制关断,求教求教