Great summary on Joachim Rossmann’s “powerblog.de” about Texas Instruments’ article “Wide bandwidth PSRR of LDO” published in “Bodo’s Power Systems” in March: “Technically-oriented, but still absolutely understandable article. Absolutely recommendable!”
You can read the powerblog in German http://bit.ly/fDPfcF or download the entire article from Bodo’s Power website http://bit.ly/e6YGHb
This article explains key LDO requirements to effectively minimize power supply ripple voltage by comparing a traditional LDO and a wide-bandwidth power supply ripple rejection (PSRR) LDO.