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This paper examines the impact of decreasing microprocessor supply voltage on system efficiency and performance. While digital designers can decrease power consumption in a microprocessor by lowering its supply voltage, efficiency and performance trade-offs arise in the power supply that offset the power reduction. Conduction losses and switching losses in a buck converter are the primary losses in...
Light load efficiency attracts more attention nowadays and its requirement becomes stringent. To improve the light load efficiency in a synchronous Buck converter, several methods, such as pulse skipping, constant on-time, and Diode Emulation (DE), can be used. Compared to other methods, DE has the advantage of keeping its switching frequency unchanged and simple control circuits. Previous literatures...
Nowadays, portable applications are very important in telecommunications, business and entertainment markets. Handheld devices like ultra mobile PCs, cell phones, PDAs and mobile Internet devices are battery-dependant. Synchronous buck converter (SBC) is extensively used as voltage regulator (VR) in mobile devices; however, at very light-load operation, the converter efficiency is severely reduced...
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