National Semiconductor Corporation announces its second-generation, digitally-programmable LP5552 PowerWise® energy management unit (EMU) and advanced power controller (APC2) intellectual property (IP) package for reducing power consumption in battery-powered handheld consumer products.  National's APC2 IP pairs with the LP5552 EMU to reduce the power consumption of high data-rate digital processors with frequency-scaling capability by up to 70%. The APC2 IP is compatible with Intelligent Energy Manager (IEM) frequency-scaling technology from ARM Ltd. National's LP5552 enables a digital processor to adaptively adjust its supply voltage to the minimum level needed, greatly reducing its power consumption. The LP5552 includes two adaptive-supply-voltage buck regulators for the processor cores and five additional programmable regulators. The linear regulators power the input/output (I/O) ring, oscillator and phase-locked loops (PLL) and embedded and external memories on low-power SoCs and can also power other auxiliary devices in the system. The PWI 2.0 interface controls the LP5552's functions for simple interfacing to the digital processor.