This paper presents simulation and small signal analysis of dc-dc boost converter with closed loop control. Small signal model of the boost converter used to analyze the small deviations around the steady-state operating point which will help in modeling the closed loop converter parameters. Complete state-space analysis is done to obtain output voltage to duty ratio transfer-functions for both ideal and Non-ideal boost converter. PI controller is designed using root locus plots for both ideal and Non-ideal cases. The model of the converter is designed and simulated for both the cases with closed loop voltage mode control providing load disturbance using MATLAB. Results are observed and compared for both ideal and Non-ideal cases.