In recent days every application must need power management. In this paper, the authors present a various techniques to handle the power management in IC. Power dissipation in a IC is based on power used by the IC and also by heat dissipation. To reduce energy use or to minimize heat dissipation some of the techniques are briefly discussed in this paper. Power management is becoming an increasingly urgent problem for almost every category of design and application, as power density, measured in watts per square millimeter and rises at an alarming rate.