题目/Title：Flash ADC-based digital LDO with non-linear decoder and exponential-ratio array

作者/Author：
                        Zhendong Ding,Xinyu Xu,Haixin Song,Woogeun Rhee,Zhihua Wang

期刊/Journal：Electronics Letters

年份/Issue Date：2019May

卷（期）及页码/Volume（No.）&pages：Vol.55, No.10, pp. 585 - 587

摘要/Abstract：
This Letter presents a digital low-dropout regulator (LDO) that achieves fast transient response with a flash ADC-based parallel comparison. A non-linear decoder is employed in the flash ADC to further enhance the transient response. In the design of the power switch array, an exponential-ratio array (ERA) is adopted for high load driving capacity. The proposed digital LDO implemented in 65-nm CMOS achieves a load range of 0.04-82.7 mA when the input voltage and the output voltage are 1.0 and 0.9 V, respectively. The digital LDO achieves a settling time of 6 渭s with a load step of 48 mA, exhibiting the state-of-the-art normalised settling time for the clock frequency of 1 MHz.