Santa Clara, Calif.—National Semiconductor's LP5550 is the first digitally-controlled energy management unit (EMU) for handheld consumer products that implements the company's PowerWise architecture for adaptive voltage scaling, thus cutting power consumption in stand alone digital processors. In conjunction with the company's advanced power controller (APC, technology licensed from ARM, Ltd.) and the PowerWise Interface (PWI) open-industry standard, the LP5550 reduces power consumption in digital processor cores by up to 70 percent.
"National Semiconductor's LP5550 redefines the industry standard for power conversion efficiency,"
said Ravi Ambatipudi, director of Advanced Power Products. "Using sophisticated digital power management control, the LP5550 maximizes both system and power conversion efficiency. This energy savings allows handheld device manufacturers to provide new features such as video and 3D gaming while maintaining long battery life."
The LP5550, working from a 3.3- to 5-volt input, enables a digital processor to adaptively adjust its supply voltage to the minimum required for the application. The LP5550 includes an adaptive buck regulator (300 mA, 0.6 to 1.2 volts) for the processor core, and three fixed-voltage regulators (0.6 to 3.3 V, two at 100 mA and one providing 250 mA). These regulators power the input/output ring, oscillator/phase-locked loops (PLL) and memory in the portable device's system-on-chip (SoC).
Click here for the product datasheet. The LP5550, in a 16-pin LLP and rated for operation over -40 to +85°C, is available now and is priced at $4.50 each in 1k quantities. Lead-free package options are also available.
National's PowerWise adaptive voltage scaling technique removes voltage margins associated with processor, temperature, IR-drop and regulator tolerances to set the minimum supply voltage for a digital processor. National's APC (synthesizable macro-cell with hardware performance monitor) automatically calibrates for process and temperature variations. The PWI, a 2-pin, high-speed serial control interface, facilitates connection of the LP5550 to the digital processor. Click here for more information about adaptive voltage scaling, here for an online seminar on the adaptive voltage scaling technology,
and here for additional information on the PWI standard.
National Semiconductor, 1-800-272-9959, www.power.national.com