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正压转负压芯片

Other Parts Discussed in Thread: TPS65131, TPS55330, LMR12015

如果电路板用3.7V的单节锂电(3.6~4.2V)供电,但是板上的运放需要±12V供电。对于这个-12V,有合适降压芯片推荐吗?电路板的最大工作电流1A。