Bharadwaj S supervised by Dr. Zia Abbas received his Master of Science – Dual Degree in Electronics and Communication Engineering (ECD). Here’s a summary of his research work on Optimized Architectures for Enhanced Transient Performance and Efficiency in Power Management ICs Supporting Modern Electronic Systems:
Power Management Integrated Circuits (PMICs) are foundational to the functionality, efficiency, and reliability of modern electronic systems. They not only regulate power delivery and consumption but also serve as critical enablers of fast, safe, and sustainable operation across a broad spectrum of applications. As system complexity continues to rise, particularly in data-centric and safety-critical domains such as memory systems and automotive electronics, the role of robust and intelligent PMICs becomes ever more indispensable.
This thesis presents a comprehensive design and implementation of PMIC building blocks tailored to the stringent requirements of fast-transient response, high reliability, and low power operation. At its core is a DC-DC converter architecture capable of handling extremely fast load transients, such as those encountered in advanced memory applications, where the load current can swing by as much as 5 A within 1 µs. These memory subsystems, along with various modules in automotive control units, often remain in low-power standby states and must transition instantly to active mode with minimal voltage droop and timing overhead. To meet such demands, the proposed converter integrates an adaptive control scheme that enhances transient response, along with a programmable over-current protection (OCP) mechanism that safeguards the system without interrupting operation. Furthermore, a calibration-based efficiency enhancement technique significantly reduces switching and conduction losses under light-load conditions, optimizing overall power efficiency without added complexity.
A key aspect of this thesis is the emphasis on simplicity and reliability in PMIC design. Power management circuitry is often at the heart of electronic systems, directly influencing the functionality and safety of every other subsystem it powers. Design complexity in this domain not only increases silicon area and verification overhead but also raises the risk of failure modes and degraded yield. Therefore, the proposed converter and protection schemes are implemented with a minimalistic yet effective control logic that ensures predictable behavior and ease of integration.
Additionally, a temperature-stable bandgap reference circuit is presented, exhibiting minimal power consumption variation across a wide temperature range of -40C to 150°C. This wide-range thermal stability is essential in automotive environments, where ambient conditions can fluctuate dramatically, and in data centers, where thermal management is critical to sustained operation.
Together, these contributions deliver a PMIC framework that meets the rigorous performance, safety, and efficiency demands of future memory and automotive systems.
September 2025