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BQ24072输出电压异常问题

Other Parts Discussed in Thread: BQ24072, TPS7A05

当使用适配器和电池同时供电时,实测VBAT是3.96V,实测VOUT是4.2V,跟手册中一致。

但是当电池拿掉,只使用适配器供电时,实测VOUT是4.44V,跟手册中的3.5Vmax值不符。

排查时,检测到VBAT脚电压波形如下,幅值2.2V,频率1.85Hz:

4.44V输出已经超过了我们负载芯片的最大额定值,存在损坏芯片的风险。请问这是什么原因导致的,以及如何解决,谢谢!