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求助 tps61032 无关关闭

Other Parts Discussed in Thread: TPS61032

芯片EN脚悬空或下拉5.1K至GND时,芯片无法关闭,一直有微弱的不稳定的电压输出大致在3~4V之间。可能是什么原因?

输入为3V1A电源,正常输出5V0.2A 

P1_12 3V输入 P1_34 GND P3是一个船型开关接口 C20 100uF C22 C23 220uF C6 C7 10uF  10V钽电容  L1 6.8uH 4.8A