International Journal For Multidisciplinary Research

E-ISSN: 2582-2160   •   Impact Factor: 9.24

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LDO Regulator Design Techniques for Improved Transient and Load Regulation

Author(s) Sai Kumar Marri, E. Sikender
Country India
Abstract Low Drop-Out (LDO) regulators are essential components in power management systems, offering efficient, stable, and noise-free voltage regulation for sensitive circuits in various applications, including portable electronics and system-on-chip (SoC) designs. This paper presents the design and optimization of an advanced LDO regulator aimed at achieving low power consumption, high stability, and excellent transient response. The proposed architecture incorporates innovative techniques such as adaptive biasing, negative resistance assistance, and capacitor-less configurations to enhance performance and reduce area constraints.

A dynamic biasing technique is implemented to minimize quiescent current while maintaining stability across a wide range of load conditions. To improve load and line regulation, as well as power supply rejection ratio (PSRR), a high-gain error amplifier is coupled with advanced feedback and compensation mechanisms. The design leverages a push-pull composite power transistor structure to enhance the slew rate, reduce output ripple, and achieve fast recovery during load transients.

Simulated and experimental results validate the effectiveness of the proposed design, demonstrating significant improvements in transient performance, efficiency, and stability compared to conventional LDO architectures. This work provides a comprehensive solution for modern power management systems, addressing the growing demand for compact, energy-efficient, and high-performance LDO regulators in integrated circuit applications.
Keywords Low Drop-Out Regulator (LDO), Power Management IC (PMIC), Transient Response, Capacitor-Less Design, Adaptive Biasing
Field Engineering
Published In Volume 5, Issue 1, January-February 2023
Published On 2023-01-26
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E-ISSN 2582-2160
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