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求推荐负电压降压芯片

Other Parts Discussed in Thread: TPS7A33, LM22670

设计需要从-28V降压到-12V,约输出500mA。

在webench只看到TPS7A33,但压差这么大应该会发热严重吧?

想来问问有什么方案比较容易实现····