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TPS54331: 输出随负载变化很大

Part Number: TPS54331

Dear TI support:

TPS54331 12V转5V 的电路,输出的5V 不固定,随着负载变化,负载大的时候2.5V~5.25V变化,空载的时候5.25V 也不是5.0V.

电路图如下

VSENSE引脚的电压跟负载变化,空载0.84V左右,带载,最低到0.5V左右。

layout 如下