题目/Title：基于数字PID补偿的降压型DC-DC控制器
                        A Buck DC-DC Controller with Digital PID Compensation

作者/Author：孟浩,贾晨,陈志良
                        Hao Meng,Chen Jia,Zhiliang Chen

期刊/Journal：微电子学 Microelectronics

年份/Issue Date：2007.Oct.

卷（期）及页码/Volume（No.）&pages：Vol.37, No.5, pp. 692 - 699

摘要/Abstract：
设计了一个基于数字PID控制,可为低压系统提供稳定电源的多相位降压型DC-DC控制电路,包括flash ADC、数字PID 控制器;并设计了一种新的基于延时单元/ 计数器的数字PWM电路,实现了一个降压型控制器。电路使用3.3V CMOS工艺设计,芯片面积为0.16mm2 ,输入电压3V ,输出电压1.25 V ,负载电流最大800mA ,纹波小于10mV ,开关频率1MHz ,效率最高达到90%。
A buck DC-DC controller with digital PID compensation was designed for low voltage applications. Analog to digital conversion, digital PID control algorithm and digital PWM were implemented in the circuit. An improved structure of hybrid delayline/counter DPWM was used without dither patterns. And a look-up table based PID controller was designed using zero-pole matching. Finally, a flash ADC was used. The chip occupies 0.16 mm2 active area in 3.3V CMOS process. For 3V input and 1.25V output voltages, the circuit has a maximum load current up to 800mA , a switching frequency of 1 MHz and a maximum efficiency up to 90%.