Presently analysis of poles and zeros in a circuit is important for choosing the topology for defining the specifications, understanding the frequency response and enhancement of the circuit stability by applying compensation. such type of analysis are also included in low-dropout (LDO) voltage in control loop for small analysis of signal by placement of poles by regulating the load current at output terminal. This paper is focusing the objective for providing a step-by-step process for analysis of poles and zeros in LDO's. Process of frequency compensation techniques are involved to get high power supply rejection ratio (PSRR) with stable frequency response .