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AM3359+TPS65217的设计电路,PMIC_POWER_EN上电约1S后就从高变低?

Other Parts Discussed in Thread: TPS65217

如题。

上电后,TPS65217时序满足需求,整个电路正常工作,3.3V电源指示灯亮。约1S钟后,所有电源OFF,用示波器测试VRTC和POWER_EN同时拉低,请问有什么办法可以解决这个问题吗?