REG1117 – TEXAS INSTRUMENTS

The REG1117 is a popular low‑dropout (LDO) voltage regulator engineered to deliver a clean, stable output voltage with minimal dropout even at low headroom. Optimized for battery‑powered and portable applications, it provides excellent load and line regulation with very low output noise. The REG1117 operates over a broad input voltage range and requires only a few external components, which simplifies circuit design and reduces overall board complexity. Packaged in a compact DIP or surface‑mount format, it offers efficient thermal performance and ease of integration into high‑density PCB layouts. Integrated protections such as current limiting and thermal shutdown further enhance its reliability. Engineers value the REG1117 for its predictable behavior, low quiescent current, and overall simplicity in power supply designs, making it ideal for powering microcontrollers, sensor circuits, and sensitive analog systems.