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两个LDO产生虚地来实现正负双电源供电是否可行

Other Parts Discussed in Thread: LM2662, TPS7A49, TPS7A30

具体如图

由于运放需要双电源供电 而且是电池供电设备  原计划是 lm2662 +TPS7A49 +TPS7A30   但是发现成本太高 所以需要一个低成本的双电源方案

LDO这样链接作为正负双电源是否可行

有没有用过的

有什么缺点

求大神解答

或者是否有其他方案推荐