EChO Reconfigurable Power Management Unit for Energy Reduction in Sleep-Active Tr

Abstract

A novel recon figurable switched-capacitor “EChO” Power Management Unit is introduced for ultra-low power duty- cycled integrated systems (e.g., sensor nodes for critical event mon- itoring). “EChO” reduces the energ y cost associated with sleep-to- active and active-to sleep transitions by 64% with an area overhead less than 1% and no impact on act ive mode operation. Analysis shows that approximately the sam e energy reduction is achieved over a very wide range of operating conditions and desig