@inproceedings{289385ef745643e3b79b6933be48f1c8,
title = "Time-based digital LDO regulator",
abstract = "This paper presents a digital LDO (DLDO) regulator utilizing a time-based comparator rather than a voltage-based comparator in order to exploit the advantages of time domain and produce a more robust regulator. The time-based comparator compares between the reference and the load voltage levels and generates a digital bit that turns on/off the PMOS power switch. It consists of three main blocks: starved inverter, phase detector and SR latch. The starved inverter acts as a voltage to time converter where it converts both reference and load voltages into time waveforms. Then, the phase detector detects the difference between the two voltage values and generates a digital signal that enables the SR latch. Finally, the SR latch activates/deactivates the PMOS power switch to support the desired load voltage level. The time-based DLDO has an input voltage range between 0.8V and 0.6V and generates a load voltage range between 0.7V to 0.5V for a load current between 50 μA and 300 μA. The design is done in 65nm TSMC. The detailed simulation results confirmed a peak current efficiency of 99\% by consuming a quiescent current of 1 μ A at VL=0.5V. The load transient response time of 2.4ns at VL=0.7V.",
keywords = "Digital LDO regulator and time-based comparator",
author = "Leen Qasem and Dima Kilani and Baker Mohammad and Mihai Sanduleanu",
note = "Publisher Copyright: {\textcopyright} 2019 IEEE.; 31st International Conference on Microelectronics, ICM 2019 ; Conference date: 15-12-2019 Through 18-12-2019",
year = "2019",
month = dec,
doi = "10.1109/ICM48031.2019.9021571",
language = "British English",
series = "Proceedings of the International Conference on Microelectronics, ICM",
publisher = "Institute of Electrical and Electronics Engineers Inc.",
pages = "23--26",
booktitle = "31st International Conference on Microelectronics, ICM 2019",
address = "United States",
}