Power dissipation estimation and advantages of low operating voltages

Like it or not, ready or not, operating voltage levels are going down. Power management is becoming increasingly important and fortunately it is becoming easier to accomplish. With each reduction in power supply voltage, power dissipation is reduced to approximately (V _CC²new/V_CC²old)×P _Dold (where V_CC is the operating supply voltage and P_D is the power dissipation, V×1). Internal current (static and dynamic), operating frequency, and external loading must also be considered to most accurately estimate power. A reduction in power supply voltage also affects some of the items mentioned. This paper includes an equation that can be used to easily and precisely estimate power dissipation of low-voltage interface products