Semi-digital control power management ICs from the United States significantly reduce the power consumption of handheld devices

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Semi-digital control power management ICs from the United States significantly reduce the power consumption of handheld devices [Copy link]

National Semiconductor has announced the industry's first digitally controlled PowerWise Energy Management Unit (EMU). Battery-powered handheld consumer electronics products can use this highly integrated energy management chip to reduce the power consumption of digital processors.

The LP5550 EMU works with National's advanced power controller and ARM's Intelligent Energy Management (IEM) technology to reduce the power consumption of digital processor cores by up to 70 percent. The LP5550 chip and advanced power controller also support the open PowerWise Interface (PWI) standard developed by National and ARM for the industry.

National's LP5550 chip can significantly reduce the power consumption of digital processors by adjusting the supply voltage to the minimum required by the actual needs of the digital processor. The LP5550 chip includes a buck regulator that provides an adaptive supply voltage for the processor core and three additional fixed voltage regulators. The three fixed voltage regulators provide power for the input/output loops, oscillator/phase-locked loop and memory of the low-power single-chip system. The PWI interface controls the functions of the LP5550 chip, allowing digital processors to easily communicate with the LP5550 chip.

"National Semiconductor's LP5550 chip sets a new industry standard for power conversion efficiency. The LP5550 chip uses advanced digital power management control technology to maximize system efficiency and power conversion efficiency at the same time. With such significant energy savings, handheld electronic product manufacturers can add new features such as video and 3D electronic games to their products while extending the battery life of their products."

The LP5550 chip supports the PWI interface, a high-speed, two-pin serial power management control interface that supports the power management functions of advanced processors. The LP5550 chip contains a digitally controlled 300mA current, 0.6V to 1.2V voltage step-down regulator with an efficiency of up to 90%, which can support adaptive voltage regulation. In addition, this chip also has three programmable low-dropout regulators with output voltages between 0.6V and 3.3V, one of which can support 100mA current and the other two can support 250mA current.

The LP5550 chip uses a small and lead-free 16-pin LLP package, which not only has excellent heat dissipation capabilities, but also can operate in a wide temperature range of -40℃ to +85℃. The input voltage is between 3.0V and 5.5V.