一种无片外电容LDO的瞬态补偿电路设计  

A transient compensation circuit for capacitorless LDO

作　　者：金永亮 张希婷 徐新涛 程心[1] 解光军[1] 张章[1] JIN Yongliang;ZHANG Xiting;XU Xintao;CHENG Xin;XIE Guangjun;ZHANG Zhang(School of Electronic Science and Applied Physics, Hefei University of Technology, Hefei 230601, China)

机构地区：[1]合肥工业大学电子科学与应用物理学院,安徽合肥230601

出　　处：《合肥工业大学学报（自然科学版）》2020年第9期1213-1217,共5页Journal of Hefei University of Technology：Natural Science

基　　金：国家自然科学基金资助项目(61674049);安徽省科技重大专项资助项目(16030901007);安徽省科技攻关计划资助项目(1501021037);安徽省大学生创新创业训练计划资助项目(2017CXCYS167)。

摘　　要：文章设计了一种用于电池供电设备中的全片上集成低压差稳压器(low-dropout regulator,LDO)芯片,其设计采用SMIC 0.18μm互补金属氧化物半导体(complementary metal oxide semiconductor,CMOS)工艺,为了保证电路具有好的静态性能,使用单级高增益折叠共源共栅放大器作为误差放大器,并设计了一个简单的比较补偿电路来改善LDO的瞬态性能。仿真结果表明:当负载电流在0.5μs内发生跳变时,其建立时间在2.0μs以内;线性调整率和负载调整率分别为0.0475 mV/V、0.00214 V/A;当电源电压范围为1.91~3.60 V时,输出电压稳定在1.80 V。This paper presents a fully integrated low-power 0.18μm complementary metal oxide semiconductor(CMOS)low-dropout regulator(LDO)for battery-operated measurement systems.A single high-gain folded cascode-compensated amplifier is employed as an error amplifier to obtain better static performances.Comparing with a conventional design,the proposed one also employs a simple transient compensation circuit to improve the transient performance of LDO.Simulation results show that the output voltage keeps a stable value of 1.80 V when the input voltage varies from a value of 1.91 V to 3.60 V.In addition,line regulation and load regulation are 0.0475 mV/V and 0.00214 V/A respectively.Settling time is lower than 2.0μs at full load transient when load current changes within 0.5μs.

关 键 词：低压差稳压器(LDO) 瞬态响应 瞬态补偿 线性调整率 负载调整率 

分 类 号：TN432[电子电信—微电子学与固体电子学]