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介绍了一种单芯片DC-DC转换器IC设计与电路实现,其特点是宽负载电流条件下具有较高效率。芯片的设计和仿真基于上华0.6μm双阱、混合信号CMOS工艺。芯片的工作电压范围为2～5V,可以使用于一般的电池供电设备。对提高芯片效率的方法以及效果进行了详细的讨论分析。仿真结果表明,芯片可以产生稳定的1.8V输出电压,并提供大于500mA的输出电流,而纹波电压却小于5mV。芯片可以获得93.8%的最大转换效率,而且在5～500mA的负载电流范围内,效率始终高于86.2%。
This paper introduces a single-chip DC-DC converter IC design and circuit implementation, which is characterized by high efficiency under wide load current conditions. Chip design and simulation based on the Chinese 0.6μm double-well, mixed-signal CMOS process. Operating voltage range of the chip is 2 ~ 5V, can be used for general battery-powered equipment. To improve the efficiency of the chip as well as the effect of a detailed discussion and analysis. Simulation results show that the chip can produce a stable 1.8V output voltage and provide greater than 500mA output current, while the ripple voltage is less than 5mV. The chip achieves a maximum conversion efficiency of 93.8%, and the efficiency is always higher than 86.2% over a load current range of 5 ~ 500mA.