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TPS63070RNMR电源输出异常?

Other Parts Discussed in Thread: TPS63070

TPS6370RNMR可调版本输出5V,PS/SYNC接VIN,挂的负载一个电子罗盘和GPS北斗,EN引脚接的一个按键IC控制引脚触发,出现输出1V左右的电压不正常;如果EN引脚直接接到VIN电压上,输出5V;