Editing System on a chip (section)

==== Power consumption ====
SoCs are optimized to minimize the [[Electric power#Definition|electrical power]] used to perform the SoC's functions. Most SoCs must use low power. SoC systems often require long [[battery life]] (such as [[smartphone]]s), can potentially spend months or years without a power source while needing to maintain autonomous function, and often are limited in power use by a high number of [[Embedded system|embedded]] SoCs being [[Distributed computing|networked together]] in an area. Additionally, energy costs can be high and conserving energy will reduce the [[total cost of ownership]] of the SoC. Finally, [[waste heat]] from high energy consumption can damage other circuit components if too much heat is dissipated, giving another pragmatic reason to conserve energy. The amount of energy used in a circuit is the [[integral]] of [[Power (physics)|power]] consumed with respect to time, and the [[Mean value theorem|average rate]] of power consumption is the product of [[Electric current|current]] by [[voltage]]. Equivalently, by [[Ohm's law]], power is current squared times resistance or voltage squared divided by [[Resistance (physics)|resistance]]:

<math display="block">P = IV = \frac{V^2}{R} = {I^2}{R}</math>SoCs are frequently embedded in [[Mobile device|portable devices]] such as [[smartphones]], [[GPS navigation device]]s, digital [[Digital watch|watches]] (including [[smartwatch]]es) and [[netbook]]s. Customers want long battery lives for [[mobile computing]] devices, another reason that power consumption must be minimized in SoCs. [[Multimedia application]]s are often executed on these devices, including video games, [[video streaming]], [[image processing]]; all of which have grown in [[computational complexity]] in recent years with user demands and expectations for higher-[[Video quality|quality]] multimedia. Computation is more demanding as expectations move towards [[3D video]] at [[high resolution]] with [[List of video compression formats|multiple standards]], so SoCs performing multimedia tasks must be computationally capable platform while being low power to run off a standard mobile battery.<ref name=":1" />{{Rp|3}}