Pereira Rial, ÓscarLópez Martínez, PaulaCarrillo, Juan M.Brea Sánchez, Víctor ManuelCabello Ferrer, Diego2024-02-092024-02-092021-11-25Ó. Pereira-Rial, P. López, J. M. Carrillo, V. M. Brea and D. Cabello, "An 11 mA Capacitor-Less LDO With 3.08 nA Quiescent Current and SSF-Based Adaptive Biasing," in IEEE Transactions on Circuits and Systems II: Express Briefs, vol. 69, no. 3, pp. 844-848, March 2022, doi: 10.1109/TCSII.2021.31306741558-3791http://hdl.handle.net/10347/32646This brief presents an ultra-low power low-dropout (LDO) regulator with an experimental total quiescent current consumption of only 3.08 nA. The circuit is designed to operate with a load current in the range 0 - 11 mA. A novel adaptive biasing scheme based on a super source follower (SSF) structure is proposed, which measures the absolute voltage difference between the two inputs of the LDO’s error amplifier and modifies the biasing current accordingly. Thus, the transient response of the regulator is improved by counteracting the effect of using such a low bias current. The proposed LDO has been fabricated in a standard CMOS 180 nm process and the experimental characterization showed an outstanding performance in terms of maximum load current over quiescent current consumption ratio.eng© 2022 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.adaptive biasinganalog integrated circuitscapacitor-less LDOlow-powernano-amperesuper source followerjournal article10.1109/TCSII.2021.3130674open access