This white paper is a step-by-step guide to choosing which low dropout (LDO) voltage regulator is needed in different applications. It begins by defining all of the different parameters you might encounter while researching LDOs. You’ll be taken through several different specific applications and the parameters required for each. This paper will explain how to define an LDO voltage regulator, how to define all of the parameters of an LDO voltage regulator, and how to identify which parameters are best in specific LDO applications.