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5v转3.3v和-5v能用一片芯片实现吗？

Jiawei Lai
Prodigy 180 points
Other Parts Discussed in Thread: CC2640R2F, LM2776, TPS63710

电池电压2.5V或者5V(两块串联)， 放大电路opamp需要+-5V，CC2640R2F工作电压范围如下图所示，1.9-3.8V，假如用3.3V，请帮忙推荐电源管理芯片，万分感谢！