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Hi
对于降压芯片而言,输入电压越高,电感峰值电流越大,如果layout不好,电路noise越大。
所以建议严格参考datasheet的layout要求来做,特别注意功率回路尽量小,以及功率电感饱和电流适当放大一些,并且芯片,MOS的散热设计也需要尽量做好一些。