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LM5141: 车规和工规LM5141区别

Part Number: LM5141

我司有个项目板上车规LM5141QRGERQ1 工作正常,FB接到VDDA,输出3.3V。

但是现在直接用工规LM5141RGER 替换后输出只有1.5V,什么原因引起?怎么修改?

车规和工规LM5141规格书上没有看到有啥区别,请帮忙支持,谢谢。