利用matlab设计要求：输入电压范围3.5-4.5VDC，输出电压5VDC，最大输出功率10W，要求纹波峰峰值小于100mV，稳态误差小于50mV，最大转换效率超过95%，50%-100%输出功率范围内效率均超过90%(The range of input voltage 3.5-4.5VDC, output voltage is 5VDC, the maximum output power of 10W, peak ripple requirement is less than 100mV,