As technology continues to evolve, the demand for high-performance yet low-power semiconductor chips has intensified. This paper explores the applications of low-power design in semiconductor chips, examining various methodologies, techniques, and their effectiveness. Through comprehensive analysis and experimental data, we highlight the significance of low-power design in modern electronics, its impact on performance, and future trends. The paper covers multiple low-power design strategies, including dynamic voltage and frequency scaling (DVFS), multi-threshold CMOS (MTCMOS), and power gating, supported by case studies and experimental results.Our findings demonstrate that DVFS significantly reduces power consumption by dynamically adjusting voltage and frequency based on workload requirements, thus maintaining performance during low-demand periods. MTCMOS utilizes transistors with different threshold voltages to balance power and performance, effectively reducing leakage power in non-critical paths. Power gating, which involves switching off power to inactive parts of a chip, proved highly effective in reducing static power consumption. These techniques, when combined, offer a comprehensive approach to low-power semiconductor design, ensuring energy efficiency without compromising performance.