Low-Power Design Techniques for Embedded Processors in Portable Devices: A Review of Methods and Applications

Abstract

Processor and system designers now priorities power consumption minimization for embedded systems that run on batteries or other portable power sources. Designing low-power embedded processors has become more important due to the increasing need for portable electronics and Internet of Things (IoT) devices. Optimization of performance and area are just as important as minimizing power consumption. As CMOS scaling advances, power consumption—both dynamic and static—poses substantial challenges in extending battery life, managing thermal constraints, and maintaining reliable operation in resource-constrained environments. Power gating, clock gating, adaptive body biasing, energy-aware software optimization, Multi-Threshold CMOS, Dynamic Voltage and Frequency Scaling (DVFS), and other low-power design strategies are reviewed in this work. It further discusses the power-performance trade-offs and emerging trends in embedded processor design, while highlighting practical applications in healthcare, automotive, consumer electronics, and industrial domains. Detailed comparisons of static versus dynamic power, processor- versus system-level consumption, and recent innovations are presented to offer holistic insight into efficient embedded system design for portable applications.