A FAST TRANSIENT CAPACITOR-LESS LDO REGULATOR WITH ACTIVE FREQUENCY COMPENSATION
Kunal Keshav,
P. Manikandan
Abstract: This paper introduces a low dropout (LDO) regulator designed for system-on-chip applications, operating without an external output capacitor. The design uses a folded cascode amplifier and an active capacitor circuit with a fast comparator to detect the offset voltage at the output in order to increase DC gain. As a result, the LDO regulator can quickly charge and discharge, the load capacitor and improving transient response while maintaining circuit stability. Furthermore, a nested miller compensation mechanism is used to stabilize the internal feedback loop under changing load conditions. The proposed LDO regulator implemented using 180 nm CMOS technology and can drive a peak load current of 50 mA while maintaining a stable output voltage of 1.6 V from a power supply voltage of 1.8 V.
Keywords: Low-dropout regulator, Fast Transient, Capacitor-less, CMOS technology, Folded cascode amplifier, Active capacitor circuit, Nested Miller compensation
DOI: 10.24874/PES08.01A.008
Recieved: 10.04.2025 Revised: 25.06.2025 Accepted: 28.07.2025
UDC:
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