一种片上电压转换器电容调制方法设计  

A capacitance modulation method design for on-chip voltage regulator

作　　者：商德佳 SHANG De-jia(Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, Shanghai 200050, China;School of Information Science and Technology, ShanghaiTech University, Shanghai 201210, China;University of Chinese Academy of Sciences, Beijing 100049, China)

机构地区：[1]中国科学院上海微系统与信息技术研究所,上海200050 [2]上海科技大学信息科学与技术学院,上海201210 [3]中国科学院大学,北京100049

出　　处：《电子设计工程》2018年第7期169-173,共5页Electronic Design Engineering

摘　　要：基于进一步提高当前片上开关电容电压转换器供电效率的目的,设计转换电容调制的方法,使电压转换器根据负载电压需求,选择合适的转换电容容值,进而在选择电压档位的基础上,提供更细粒度的输出电压,降低总功耗。对于2:1转换比例的拓扑设置,在负载功耗需求较低的情况下,相比固定电容电压转换器,所提出的电压转换器在满足负载电压需求的前提下,可以实现27%的电压转换效率提升,同时输出电压纹波仍能控制在50 mV之内。在负载功耗需求较高的情况下,电容调制仍可以使电压转换器效率提升12%。In order to further improve the power efficiency of current on-chip switched-capacitor voltage regulator, this paper proposed a capacitance modulation method to help select reasonable capacitance based on the load demand. On the basis of conversion ratio selection, more fine-grained output voltage can be provided. Therefore, the power can be reduced. For the 2：1 conversion topology, when the load power demand is relatively low, compared with fixed-capacitance voltage regulator, the proposed regulator can meet the load power demand, and realize 27% power efficiency improvement. Meanwhile,the output voltage ripple was remained within 50 mV; when the load power demand is high, capacitance modulation can realize a power efficiency increment of 12%.

关 键 词：多核处理器 开关电容电压转换器 电容调制 供电效率 输出电压纹波 

分 类 号：TN409[电子电信—微电子学与固体电子学]