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An Output-Capacitorless Adaptively Biased Low-Dropout Regulator with Maximum 132-MHz UGF and Without Minimum Loading Requirement

机译:输出电容器可自适应地偏置低压丢失调节器,最大132-MHz UGF,无需最小负载要求

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This paper presents an output-capacitorless adaptively biased (AB) low-dropout regulator (LDO) with stable behavior in 0-25 mA load range. The enhanced multipath nested Miller compensation (EMNMC) with embedded feedforward path and Q-reduction compensation technique are proposed, to achieve high loop gain and wide bandwidth. A symmetrically matched current-voltage mirror (SMCVM) is applied to implement the AB scheme, enabling accurate load current sensing and robust operation of the LDO during full load range. The proposed LDO has been designed in a 0.13-μm CMOS technology. Simulation results verify that the proposed LDO works stably under 0~25 mA loading current and 0~50 pF loading capacitance. It has a maximum current efficiency of 99.17% and a maximum unity-gain frequency (UGF) of 132 MHz. The extension of UGF also magnificently contributes to improvement of power-supply rejection (PSR).
机译:本文介绍了输出电容器自适应偏置(AB)低丢失调节器(LDO),在0-25 mA负载范围内具有稳定的行为。提出了具有嵌入式前馈路径和Q降低补偿技术的增强型多径嵌套米勒补偿(EMNMC),以实现高环增益和宽带宽。应用了对称匹配的电流 - 电压镜(SMCVM)来实现AB方案,在满载范围内实现LDO的精确负载电流检测和鲁棒操作。所提出的LDO已经设计成0.13微米的CMOS技术。仿真结果验证所提出的LDO稳定地效果0〜25 mA负载电流和0〜50 PF加载电容。它具有99.17%的最大电流效率和132 MHz的最大单位增益频率(UGF)。 UGF的扩展也略微有助于改善电源抑制(PSR)。

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