面向IoT终端低功耗快速瞬态响应全集成LDO设计OA
A fully-integrated LDO with low power consumption and fast transient response for IoT terminals
为了满足物联网(IoT)终端对电源管理芯片高集成度、低功耗与快速瞬态响应的需求,提出了一种全集成低压差线性稳压器(LDO).该电路采用亚阈值CMOS电压基准电路和自适应偏置电流电路,减小了LDO面积并降低了功耗.采用带局部共模反馈电路的误差放大器、超级源跟随器、瞬态增强电路和衬底调制放大器改善LDO的瞬态响应性能.该电路基于SMIC 55 nm CMOS工艺设计和验证,结果表明:该LDO在输入电压1.1～1.5 V范围内可稳定输出1.0 V电压,最大负载电流为50 mA,静态电流为6.17 μA;负载电流在0.5～50 mA范围内以1 μs的速率跳变时,过冲电压和欠冲电压分别为14.8 mV和29.2 mV,稳定恢复时间分别为3 μs和2.4μs.该LDO适用于低功耗物联网应用场景.
In order to meet the requirements of high integration,low power consumption,and fast transient response for power management chips in Internet of Things(IoT)terminals,a fully integrated low dropout linear regulator(LDO)was proposed.This circuit adopted a subthreshold CMOS voltage reference circuit and an adaptive bias current circuit to reduce the LDO area and the power consumption.An error amplifier with a local common-mode feedback circuit,a super source follower,a transient enhancement circuit,and a substrate modulation amplifier were adopted to improve the transient response of the LDO.The circuit was designed and verified based on SMIC 55 nm CMOS technology.The results showed that when the input voltage ranged from 1.1 V to 1.5 V,the LDO stably outputed 1.0 V,with a maximum load current of 50 mA and a quiescent current of 6.17 μA.When the load current jumped within the range from 0.5 mA to 50 mA in 1 μs,the overshoot voltage and undershoot voltage were 14.8 mV and 29.2 mV,respectively,and the stable recovery time were 3 μs and 2.4μs,respectively.This LDO is suitable for low-power IoT application scenarios.
李宇航;吴巍;王俊峰
南京邮电大学 集成电路科学与工程学院,江苏南京 210023||南京宇都通讯科技有限公司,江苏南京 210046南京宇都通讯科技有限公司,江苏南京 210046南京邮电大学 集成电路科学与工程学院,江苏南京 210023||南京宇都通讯科技有限公司,江苏南京 210046
信息技术与安全科学
低功耗超级源跟随器全集成LDO局部共模反馈
low power consumptionsuper source followerfully integrated LDOlocal common-mode feedback
《电子元件与材料》 2026 (4)
414-423,10
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