PowerWise Technology Compliant Energy Management Unit

The LP5550 is a PWI 1.0 compliant Energy Management System for reducing power consumption of stand-alone mobile phone processors such as base-band or applications processors.
The LP5550 contains an advanced, digitally controlled Switching Regulator for supplying variable voltage to processor core and memory. The device also incorporates 3 programmable LDO-regulators for powering I/O, PLLs and maintaining memory retention in shutdown-mode.
The device is controlled via the PWI open-standard Interface The LP5550 operates cooperatively with PowerWise technology compatible processors to optimize supply voltages adaptively over process and temperature variations or dynamically using frequency/voltage pre-characterized look-up tables.
By National Semiconductor Corporation