One of the viable technologies to actuate robotic systems such as quadruped or biped is the use of hydraulic energy through centralized electro-hydraulic systems. The use of huge motor-pump assembly resulting increase in the whole system dimension along with the piping arrangements to connect the different components limits its use for autonomous robots. Present research trend is to develop miniaturized integrated electro-hydraulic systems such that each robotic joint will have its own actuation system dimensioned to fulfill the force and the velocity requirements. For such a system the hydraulic pump generates the hydraulic power required for the actuation system. The present work reports the development of a miniaturized vane pump. The conventional version of this is widely used in hydraulic control systems to maintain constant flow rate. However, the analysis of such kind of pump in its miniaturized form is yet to be addressed. A mathematical model has been developed to analyze the performance of the pump. The model has been simulated in Matlab/Simulink environment to obtain the delivery flow and pressure ripples for different operating conditions. It has been found that for the chosen size, the pump can able to develop substantial amount of pressure required for the actuation system.