高稳定性LDO集成电路设计  

Design of high stability LDO integrated circuits

作　　者：李亮[1] 黄思仪 宋惠安 钮小超 成珏飞[1] 汪义旺[1] LI Liang;HUANG Si-yin;SONG Hui-an;NIU Xiao-chao;CHENG Jue-fei;WANG Yi-wang(School of Electronic Information Engineering,Suzhou Vocational University;Suzhou Xinzhong Microelectronics Co.,LTD.)

机构地区：[1]苏州市职业大学电子信息工程学院 [2]苏州芯众微电子有限公司

出　　处：《中国集成电路》2025年第1期59-64,共6页China lntegrated Circuit

基　　金：苏州市科技计划项目(SZS2022015);江苏高校“青蓝工程”资助项目。

摘　　要：本文设计了一款高稳定性的LDO集成电路,它具有输出稳定性高的优点。在考虑参数指标折中的条件下设计了性能可靠的带隙电压基准源电路和两级共源共栅误差放大器电路以及限流保护电路,通过调节各模块的参数来平衡LDO的性能。设计完成在UMC 0.11μm工艺下,通过Cadence仿真与验证,结果表明设计的LDO在输入电压2V到5V间均可以稳定输出1.8V的电压值;温度系数为5.33ppm/℃;线性调整率为0.00012%/V;负载调整率为0.0173%/mA,显示出本设计的LDO线性稳压器性能优异,满足实际应用的需求。In this paper,a high stability LDO integrated circuit is designed,which has the advantage of high output stability.A reliable bandgap voltage reference circuit and a two-stage cascode error amplifier circuit,as well as a current-limiting protection circuit are designed under the consideration of parameter optimization,and the performance of the LDO is balanced by adjusting the parameters of each module.The design is completed in UMC 0.11μm process,and the results are simulated and verified by Cadence,which show that the designed LDO can stabilize the output voltage of 1.8V from 2V to 5V input voltage,with a temperature coefficient of 5.33ppm/℃,a linearity adjustment rate of 0.00012%/V,and a load adjustment rate of 0.0173%/mA,which shows that the designed LDO linear regulator has excellent performance and meets the requirements of practical applications.

关 键 词：电源管理 LDO 带隙基准源 误差放大器 限流电路 

分 类 号：TM4[电气工程—电器]