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UCD9222+7242提供6678核电压的模拟引脚输入电压问题

Other Parts Discussed in Thread: TPS54620

6678开发板上使用的输入电压是12V,通过tps54620转出3.3V,  9222的输入电压是3.3V,但电压监控引脚Vlimon是12V电阻分压到1.53V,我现在的板子供电电压是5V,可以转出3.3V,  Vlimon引脚12V换成5V有问题吗,需要注意些什么

还有7242原来的供电电压是12V,我也换成了5V或3.3V,有问题吗?周围的电容值需要改吗