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tps62260 无故发热

Other Parts Discussed in Thread: TPS62260

我们用tps62260给单片机供电,后级电流10mA左右,但是返现tps62260无故发热。

经过测量,发热的板子的系统总电流达到了300mA,tps62260 的 SW与GND之间的电阻只有150欧姆左右。

焊接了10块板子,其中3块出现发热问题。其它未出现,未出现板子SW/GND之间的电阻非常大!

希望能够得到解答或者建议,谢谢