一种高稳定性、快速瞬态响应低压差LDO  

The LDO with high stability and fast transient response

作　　者：杨洁[1] 曾云[2] 杨艳军[2] 

机构地区：[1]遵义师范学院物理与机电工程学院,贵州遵义563002 [2]湖南大学物理与微电子科学学院,湖南长沙410082

出　　处：《微型机与应用》2013年第12期27-29,34,共4页Microcomputer & Its Applications

摘　　要：基于上华0.5μm工艺设计了用于DC/DC的CMOS低压差线性稳压器,其输入电压为3.3V,输出电压为1.2V,最大输出电流为100mA;提出了一种补偿网络,保证负载电流发生变化时,LDO具有高稳定性。此外,还设计了一种瞬态响应改善电路来提高负载瞬态响应。仿真结果表明,该LDO在不同负载情况下的相位裕度均为80°,流片测试结果显示瞬态响应良好。A CMOS low-dropout linear regulator is designed for DC/DC in CSMC 0.5 μm process,with input voltage of 3.3 V,output vohage of 1.2V and maximum output current of 100mA. To guarantee stability of the system when load current changes, this paper proposes a novel compensation scheme. In addition, a circuit is designed to improve load transient response. Simulation results show that the LDO achieves 80°phase margin with different load current.And the taped test results show that the LDO has a good transient response.

关 键 词：补偿网络 低压差 瞬态响应 

分 类 号：TN432[电子电信—微电子学与固体电子学]