LDO器件噪声特性分析及输出噪声测试方法研究  

Noise characteristic analysis and output noise measurement method of LDO

作　　者：王长鑫 张虹 高会壮 陈波 Wang Changxin;Zhang Hong;Gao Huizhuang;Chen Bo(China Aerospace Science Industry Corp Defense Technology R&T Center,Beijing 100039,China)

机构地区：[1]航天科工防御技术研究试验中心,北京100039

出　　处：《电子技术应用》2022年第9期70-74,共5页Application of Electronic Technique

摘　　要：随着国产LDO器件在装备中的大量使用,为保障元器件应用可靠性,需针对LDO输出噪声指标测试方法进行研究。结合实际验证工作,基于TCAD仿真,分析LDO器件噪声的主要来源模块,包括基准电路、误差放大器和反馈电阻网络。采用低噪声镍氢电池组作为偏置源进行供电,并在测试电路中加入滤波电容和耦合电容,可有效降低测试系统本底噪声对噪声测试结果的影响。搭建输出应用验证测试平台,验证可有效测试LDO的输出噪声,提升LDO参数测试技术及性能可靠性保障能力。With the extensive application of domestic LDO in equipment,in order to ensure the reliability of components,it is necessary to research the measurement method of LDO output noise.Combined with the actual verification work the main,noise sources of LDO are analyzed based on TCAD simulation.Low noise nickel-metal hydride battery pack is used as bias source for power supply.Filter capacitance and coupling capacitance are added in the test circuit which can effectively reduce the background noise and its influence on the output noise measurement of the device.The output noise verification test is effectively to test the output noise of LDO,and improve the LDO parameter testing technology and performance reliability assurance capability.

关 键 词：LDO 输出噪声 1/f噪声 TCAD 噪声测试 

分 类 号：TN406[电子电信—微电子学与固体电子学]