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TPS82085输出异常

Other Parts Discussed in Thread: TPS82085

如题,我设计了一个TPS82085的电路,将3.3V电压转换为1.2V电压,实测1.2V消耗电流为0.85A。

上一级电源为LTM4644提供,供流能力为4A。

上电程序加载后,3,3V电源从0到3.3开始震荡,持续震荡。

4644为成熟性设计,一共使用了8路,只有后面接82085芯片这一个通道出现问题,

请问可能是什么原因导致的呢?