To make LDO stable by compensation. How to obtain open loop gain phase plot to compensate LDO, since it is not available in the datasheet. Since its very much required for LDO load transient, load regulation etc. This information is essential I belive. From datasheet (not given in block diagram). How to understand its internally compensated or externally compensated. https://www.diodes.com/assets/Datasheets/ZXCL260.pdf https://datasheets.maximintegrated.com/en/ds/MAX1725-MAX1726.pdf