This article presents an event-driven charge-pump-based low-dropout (LDO) regulator with an ac-coupled high-impedance (ACHZ) feedback loop. By using the ACHZ loop and continuous-time dead-zone detection, the proposed LDO responds in less than a clock cycle during load transients, achieving the response and settling times of 6.9 and 65 ns, respectively, all at a 4.9- $\mu \text{A}$ quiescent current for a sub-4-fs FoM. The output ripple is measured to have a stable amplitude and is <15 mV over the LDO’s 105000 $\times $ stable load range (1 $\mu \text{A}$ –105 mA). In addition to all these features, the proposed LDO also retains the advantages of normal digital LDOs: process portability and the ability to operate at a low supply voltage.

中文翻译：

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基于动态高阻抗电荷泵的 LDO，具有类似数字 LDO 的特性，可实现低于 4-fs 的 FoM

本文介绍了一种具有交流耦合高阻抗 (ACHZ) 反馈环路的基于事件驱动的电荷泵的低压差 (LDO) 稳压器。通过使用 ACHZ 环路和连续时间死区检测，建议的 LDO 在负载瞬变期间的响应时间不到一个时钟周期，分别实现了 6.9 和 65 ns 的响应时间和 65 ns 的响应时间，所有时间均为 4.9- $\mu \text{A}$ 低于 4-fs FoM 的静态电流。输出纹波经测量具有稳定的幅度，并且在 LDO 的 105000 上小于 15 mV $\times $ 稳定负载范围 (1 $\mu \text{A}$ –105 毫安）。除了所有这些特性之外，所提议的 LDO 还保留了普通数字 LDO 的优点：工艺可移植性和在低电源电压下工作的能力。