一种高增益快速响应且无片外电容型LDO设计  

Design of a Capacitor-Less LDO Regulator with Fast Response and High Open Loop Gain

作　　者：胡玉松[1] 冯全源[1] 

机构地区：[1]西南交通大学微电子研究所,成都610031

出　　处：《电子器件》2015年第2期259-263,共5页Chinese Journal of Electron Devices

基　　金：国家自然科学基金项目(61271090);国家高技术研究发展计划(863计划)重大项目(2012AA012305);四川省科技支撑计划项目(2015GZ0103)

摘　　要：设计了一款无片外电容低压差线性稳压器(LDO),其瞬态响应速度极快,且增益高、带宽宽,输入电压范围为2.8V^5.0V,输出电压2.4V。使用HSPICE仿真验证了直流、交流、瞬态、温度等特性。在Typical工艺角情况下,负载电流以100mA/1μs突变时,输出电压突变量最大为89mV。重载与轻载模式下电压差也仅为16.8mV,在两种极端工艺角条件下,输出电压突变量最大108mV。此LDO无片外电容,整个片内补偿电容仅为4pF,3dB带宽为4068Hz,0dB带宽高达52MHz。A capacitor-less low-dropout regulator（ LDO） is proposed with improved fast transient response and high open loop gian and wide band width（ WB）,the input voltage range is 2. 8V -5. 0V,the output voltage is 2. 4V.The characteristic of direct current,alternating current,transient and temperature simulation and verification by HSPICE. The maximum voltage step is about 89mV at a load step of 100mA /1 μs under typical craft condition.The voltage differential is just about 16. 8mV in the heavy load and light load respectively. The maximum voltage step is about 108mV in the two extreme case. The 3 dB band width is 4 068Hz and the 0dB band width is 52MHz for the whole chip compensation capacitor just of 4 pF,and without output capacitor.

关 键 词：电源管理 低压差线性稳压器 瞬态响应 宽带宽 无片外电容 

分 类 号：TN43[电子电信—微电子学与固体电子学]