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LDO与电荷泵运放设计双电源问题

目的:采用TI LDO LP5907 芯片 搭配 电荷泵 LM2776 芯片设计运放双电源(±2.75V)。

思路:参考LM2776数据手册,设计示意如下图

问题总结:根据LDO LP5907数据手册中描述,LDO低噪声适合设计运放电源,电荷泵 LM2776用于运放提供负电源需要进行滤波吗,如果需要有没有好的推荐方法?