摘要
An integrated 3.3V/1.2V SC DC-DC converter operating under 10MHz with a fixed duty radio of 0.5 is presented.To improve the output current of the converter,CMOS technology is adopted to fabricate the switching devices,and mutually compensatory circuitry technology is also employed to double the output current furthermore.The simulation results using Hspice simulation software,show that the output currents of a single unit circuit and two unit circuits connected in a mutually compensatory manner of the improved converter is about 12.5mA and 26mA,respectively.The power conversion efficiency of the mutually compensatory circuit can amount to 73%,while its output voltage ripple is less than 1.5%.The converter is fabricated in standard Rohm 0.35μm CMOS technology in Tokyo University of Japan.The test result indicates that the output current of 9.8mA can be obtained from a single unit circuit of the improved converter.
介绍了一种具有改进电路结构和改进工艺的单片集成 3.3V/ 1.2 V开关电容 DC- DC变换器 ,其控制脉冲频率和固定导通比分别为 10 MHz和 0 .5 .为了提高变换器的输出电流 ,采用 CMOS工艺来制造电路中的开关器件和改进的互补型电路结构 .使用 Hspice电路仿真软件得到的仿真结果表明改进变换器的单个单元电路和互补型电路可使输出电流分别达到 12 .5 m A和 2 6 m A,且后者的功率转换效率为 73% ,输出电压纹波小于 1.5 % .变换器在日本东京大学的标准 Rohm 0 .35 μm CMOS工艺线上投片试制 ,测试结果显示 ,使用 CMOS开关的变换器单元电路的输出电流为 9.8m A.
基金
国家自然科学基金资助项目 (批准号 :5 0 1770 2 7)~~
