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LDO regulators in series to provide +/- filtered power rails?

Question asked by johnmcgft on Dec 30, 2012
Latest reply on Oct 29, 2014 by LucaV

Are there any issues using a pair of LDO positive regulators effectively in series to provide a claen low voltage +/- power supply for an analog section of a circuit that is fed from a +/- switch mode supply?

My circuit is powered from a +5, 0, -5V supply and I want the analog section of the circuit to be +2.7, 0, -2.7V. The positive rail is trivial, how can I regulate the negative side of the circuit to 2.7V?

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