Question: In our low-dropout voltage regulators series, we have the TSP71xx, TSP72xx, TSP73xx. My customer will have a LC549 device and the board where the DSPs are. We will have +12, +5, 0, -5 and -12 V. I guess +5V is relevant here.
What do you recommend?
Which one is the most often used?
Is there a need for low-dropout since input is 5V?

Answer: The LDOs are intended for Battery power devices with very low Quiescent currents ( current at power up) and low voltage drop. This two parameters determine the life of the batteries therefore the need for LDO"s in these type of apps. customers can use the TSP7201 for the PMR hansets ( TETRAPOL). As a summary the TPS71XX has the lowest Iq, and Voltage drop therefore expensive. The TPS73XX has almost same performance as the TPS71XX but they have added reset capabilities ( also expensive). The TPS72XX is lower performance but low cost. If your application is really not so power critical I believe the TPS72XX series could make sense. To generate the 3.3V you could use the TPS7233 To generate the 2.5V you could use the TPS7201