In this paper, we identify and address the problems of designing effective power management schemes in low-power MCU design. Firstly, this paper proposes an application-based multipower domain architecture along with a variety of working modes to effectively realize the hierarchical control of power consumption. Furthermore, devices in energy IoT (eIoT) do not always work under the main power supply. When the main power supply is unavailable, the standby power supply (usually the battery) needs to maintain the operation and save the data. In order to ensure the complete isolation between these two power sources, it is always necessary to insert a diode in both select-conduction paths, respectively. In this paper, we built a stable and smooth power switching circuit into the chip, which can effectively avoid the diode voltage loss and reduce the BoM cost. In addition, in the sleep mode, considering the relaxed output voltage range and a limited driving capability requirement, an ultra-low-power standby power circuit is proposed, which can autonomously replace the internal LDO when in sleep, further reducing the sleep power consumption under the main power supply. Fabricated in a standard 0.11 μm CMOS process, our comparative analysis demonstrates substantial reduction in power consumption from 1 μA to 0.1 μA.

中文翻译：

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用于能源物联网应用的低功耗MCU中的电源管理

在本文中，我们确定并解决了低功耗MCU设计中设计有效电源管理方案的问题。首先，本文提出了一种基于应用的多电源域架构以及多种工作模式，以有效地实现功耗的分级控制。此外，能源物联网（eIoT）中的设备并不总是在主电源下工作。当主电源不可用时，备用电源（通常是电池）需要维持操作并保存数据。为了确保这两个电源之间完全隔离，始终有必要在两个选择导通路径中分别插入一个二极管。在本文中，我们在芯片中构建了稳定且平滑的电源开关电路，这样可以有效避免二极管的电压损失，降低BoM成本。此外，在睡眠模式下，考虑到宽松的输出电压范围和有限的驱动能力要求，提出了一种超低功耗待机电源电路，该电路可以在睡眠时自动替换内部LDO，从而进一步降低了睡眠功耗在主电源下。以标准0.11制作 通过对μm CMOS工艺的比较分析，我们可以将功耗从1μA大幅降低 至 0.1μA。