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TPS54531: 前序问题TPS54531新发现

Part Number: TPS54531

两年前的这个问题有个新发现

https://e2echina.ti.com/support/power-management/f/power-management-forum/214620/tps54531/678381#678381

就是boot管脚和PH管脚之间从boot管脚到电容的走线上,有个过孔不完全导通,没有完全断,有几k的电阻值,而且好几块板都是同一个位置,输出7V和10V的54531有这个问题,输出5V的那片没有过

测这条线路的电流最多也就20~30mA,可能是什么原因呢