适用于片内集成的可修调低失调LDO  

Trimmable low offset LDO for on chip application

作　　者：杨诗洋[1] 陈岚[1] 陈巍巍[1] 陈丽[1] 龙爽[1] 吕志强[1] 

机构地区：[1]中国科学院微电子研究所,北京100029

出　　处：《电子设计工程》2014年第6期77-78,81,共3页Electronic Design Engineering

基　　金：国家重大科技专项(2009ZX02303-004;2010ZX02201-002-001;2012ZX03001038-005)

摘　　要：提出了一种新型可修调低失调LDO电路,该电路适于片内集成应用。现有的修调方法一般直接作用在反馈网络中,修调电路的自身失调会造成修调精度损失。本文提出一种失调隔离模块,以大大减小修调电路引入的误差。仿真结果表明,在修调电路发生10%的电流失调时,输出电压仅变化0.31%,使LDO输出电压的修调获得很好的线性度。An LDO linear regulator with trimming capability and low offset probability is presented,which is tailored for SOC embedded application.The existing trimming methods usually operate on the feedback network directly,causing a trimming accuracy loss by the offset of the trimming circuit itself.This paper proposes an offset isolation module to minimize the error caused by the trimming circuit.Simulation results shows that with a 10％ current offset in the trimming circuit the output voltage changes only 0.31％,and a fine linearity of the LDO output voltage trimming is gained.

关 键 词：LDO 线性稳压器 修调 失调 

分 类 号：TN47[电子电信—微电子学与固体电子学]