一个快速的短暂响应电容器-Less LDO 与短暂增强技术
Chufan Chen1, Mengyuan Sun1, Leiyi Wang1,2
1State Key Laboratory of ASIC and System, School of Microelectronics, Fudan University, Shanghai 200433, China.
Micromachines
|March 28, 2024
概括
这项研究引入了用于混合电路的无电容低掉电调节器 (CL-LDO),实现快速过渡响应而不影响稳定状态性能. 新型设计提高了电压调节应用的效率和稳定性.
科学领域:
- 集成电路设计 集成电路设计
- 模拟电子产品 模拟电子产品
- 电力管理 电力管理
背景情况:
- 传统的低泄漏调节器 (LDO) 往往需要大型芯片电容器以保持稳定性,增加面积和成本.
- 在没有外部电容器的LDO中实现快速过渡响应是现代集成电路的一个重大挑战.
研究的目的:
- 提出一种新型的无电容低落调节器 (CL-LDO),具有快速的短暂负载响应.
- 为了确保稳定状态性能和循环稳定性,而不依赖于离芯片或大型芯片电容器.
主要方法:
- 使用轨道对轨道输入和推拉输出 (RIPO) 放大器来增强增益和低功耗的CL-LDO的设计.
- 集成超源追随器缓冲区 (SSFB) 与内部稳定性,以实现强大的循环性能.
- 包括一个辅助电路,以改善短暂响应而不影响稳定状态的稳定性.
主要成果:
- 拟议的CL-LDO实现了47μA的静止电流和25μV/mA的优异负载调节,用于0到20mA的电流.
- 证明的快速沉降时间:从0mA到20mA的负载步骤为0.2μs,从20mA到0mA的负载步骤为0.5μs.
- 该设计采用180纳米的工艺运行,将1.2V1.8V输入转换为1V输出.
结论:
- 拟议的无电容LDO有效地提高了瞬态性能,同时保持了稳定状态的稳定性.
- 这种设计为在空间和效率至关重要的数字-模拟混合电路中的电源管理提供了可行的解决方案.
- 新的RIPO放大器和SSFB有助于在没有外部补偿组件的情况下实现高性能.
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