摘要
设计一种基于动态频率补偿技术的低功耗无片外电容的低压差线性稳压器(LDO)电路.该电路在1.8~2.2 V输入电压范围内工作,可提供1.3~1.65 V的可调输出电压,默认输出电压设置为1.5 V.输出电压由3位数字信号控制,调节精度为50 mV.通过采用动态频率补偿技术,系统在轻载(0.1 mA)至重载(100 mA)的宽负载范围内有效优化了相位裕度和带宽,确保良好的动态响应和输出稳定性.该电路采用SMIC 0.18μm工艺实现,展现出优异的低功耗特性.仿真结果显示,该电路在不同负载条件下均表现出良好的鲁棒性,输出电压调整率优于±0.5%,负载调整率约为1μV/mA,瞬态响应时间小于2μs.这些结果表明,该设计在稳态和动态性能方面均有突出表现.
This paper designs a low-power capacitorless low dropout linear regulator(LDO)circuit based on dynamic frequency compensation technology.The circuit operates within an input voltage from 1.8V to 2.2V and provides an adjustable output voltage of 1.3V to 1.65V,with a default output of 1.5V.The output voltage is controlled by a 3-bit digital signal with a resolution of 50 mV.By employing dynamic frequency compensation,the system effectively improves phase margin and bandwidth across a wide load range from light load(0.1 mA)to heavy load(100 mA),ensuring excellent dynamic response and output stability.The circuit,implemented using SMIC 0.18μm process,demonstrates excellent low-power characteristics.The simulation data shows that the circuit exhibits excellent robustness under varying load conditions,with an output voltage regulation of better than±0.5%,a load regulation of approximately 1μV/mA,and a transient response time of less than 2μs.These results indicate that the design performs exceptionally well in both steady-state and dynamic performance.
作者
孙如意
李宏民
钱坤
SUN Ruyi;LI Hongmin;QIAN Kun(School of Physics and Electronic Science,Hunan Institute of Science and Technology,Yueyang 414006,China)
出处
《湖南理工学院学报(自然科学版)》
2025年第4期11-18,共8页
Journal of Hunan Institute of Science and Technology(Natural Sciences)
基金
湖南省教育厅科学研究项目(23B0638)。
关键词
频率补偿
低功耗
可调输出电压
稳定性
低压差线性稳压器
frequency compensation
low-power
adjustable output voltage
stability
low dropout linear regulator
