System-Level Power Management Design Issues for Handheld Wireless Devices
As the electronics world embraces wireless devicesfrom cell phones to smart sensors to wearable computersit naturally embraces power management technology as well. And the reason for embracing power management technology is simpleit is the ability of a wireless device to operate for long periods of time that makes it autonomous. But, another reason power management technology has become so important is that battery technologypower management's logical partner in extending operational lifehas simply lagged advances in semiconductors and software. Specifically, over the past decade, the increasing desire of users for more functionality in smaller wireless devices has not been matched by improvements in battery energy density.
This article delves into the challenges that lie ahead for designing cost-effective energy aware devices that offer both high performance and extended battery life.