Abstract
In this paper, we propose integrated chip DC-DC buck converter for wireless power receiver. The control of DC-DC buck converter is designed by current-mode technique. The DC-DC converter is an essential power management circuit that adjusts the output voltage based on portable electronic device applications. In addition, it reduces the energy loss due to thermal degradation and noise generated at power transmission. Therefore, DC-DC converter that operates at high efficiency is a major design constraint for wide input voltage variation. The proposed DC-DC converter is implemented andfabricated using 0.18μm BCD process. The DC-DC converter comprises of OTA, compensator, current sensing circuit, clock and ramp signal generator and a comparator. It is designed for 85% peak efficiency with a 1MHz switching frequency, 5.5V to 10V input voltage and 400mA maximum load current. The maximum accuracy for sensing current reaches 99%.
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