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TPS61091有两路输出，一个给系统，另外一个给外设，缺点就是给外设的LDO噪音有点大，如果能小点就好了，后面接24bit的精密AD。
10hz to 100Khz，12.7-15.4uVrms即可。是否好的方案推荐
LI电池供电
Hi
LDO 可以选择LP5907 这样超低noiseLDO: http://www.ti.com/lit/ds/symlink/lp5907.pdf
(在LDO列表中选择noise范围即可得到合适的芯片： http://www.ti.com/lsds/ti/power-management/single-channel-ldo-products.page?&virtualTreeURL=D_ATTRIBUTE_3001165|EQ|Yes&filter=a1165|EQ|Yes ）
进入TI官网www.ti.com, power management下面的LDO，选择PSRR符合你们要求的。
