Design of a capacitorless low-dropout voltage regulator with fast load regulation in 130nm CMOS

This paper describes a low-dropout (LDO) voltage regulator system for portable device applications, with a capacitorless output. The regulator operates with supply voltages from 1.6V to 2V, providing 0.9V to 1.4V regulated voltages at a 99.2% current efficiency. The fully integrated architecture with a 100pF integrated decoupling capacitor was implemented in IBM 130nm CMOS technology, allowing greater power system integration. Post-layout simulations of our design demonstrate that the proposed LDO architecture provides a fast load regulation with a fast 320ns response time for 100mA load current and regulated voltage variations of less than 25mV.