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-5V基准电压怎么实现?

Other Parts Discussed in Thread: TPS60403, LM27762, REF02

需要+5V、-5V电压给运放供电,对供电精度要求较高,+5V电压采用基准电压源可以得到,但-5V目前没有好的解决方案。

目前想用反相放大电路(±12V供电)实现+5V转-5V,但精密运放带10MA电流(未达到运放的最大输出电流20MA)会使

输出电压跌落吗?如果跌落,大概会稳定在什么范围?

或者有其他-5V基准电压的实现方式,也请各位大神推荐一下!谢谢先