STMicroelectronics L4931CD50-TR Linear Voltage Regulator 5V 250mA 8-SOIC

STMicroelectronics L4931CD50-TR: Precision Linear Voltage Regulation for Modern Electronics

In today's rapidly evolving electronic systems, reliable power management solutions are critical for ensuring optimal performance and longevity. The STMicroelectronics L4931CD50-TR linear voltage regulator emerges as a sophisticated engineering solution designed to deliver stable 5V output with exceptional efficiency and protection features. This fixed-output regulator combines advanced semiconductor technology with robust design principles to address the demanding requirements of industrial, automotive, and consumer electronics applications.

Technical Excellence in Voltage Regulation

Engineered with a maximum input voltage capability of 20V, the L4931CD50-TR operates with remarkable efficiency while maintaining a minimal voltage dropout of just 0.8V at 250mA load current. This low dropout characteristic enables designers to maximize energy efficiency while maintaining output stability across varying operating conditions. The device's quiescent current consumption remains exceptionally low at 1mA, making it particularly suitable for battery-powered applications where power conservation is paramount.

Advanced Protection Features

Designed with system reliability in mind, this 8-SOIC packaged regulator incorporates comprehensive protection mechanisms. Built-in overcurrent protection safeguards against excessive load conditions, while integrated thermal shutdown circuitry prevents damage from overheating. These inherent safety features eliminate the need for external protection components in most applications, reducing overall system complexity and bill-of-materials costs.

Performance and Packaging

The device maintains exceptional line and load regulation across its operating range, with a power supply rejection ratio (PSRR) reaching 70dB at 120Hz and maintaining 55dB performance up to 10kHz. This superior noise rejection capability makes it ideal for powering sensitive analog and digital circuits requiring clean, stable voltage sources. The 8-SOIC surface-mount package (3.90mm width) offers excellent thermal performance while maintaining compatibility with automated PCB assembly processes.

Design Flexibility

While optimized for fixed 5V applications, the L4931CD50-TR's compact footprint and high performance characteristics make it adaptable to a wide range of use cases. From industrial control systems and automotive electronics to consumer devices and IoT sensors, this voltage regulator provides consistent performance across diverse operating environments. Its wide operating temperature range (-40°C to 125°C) ensures reliability in both extreme cold and hot conditions.

Conclusion

The STMicroelectronics L4931CD50-TR represents a perfect balance of performance, protection, and packaging efficiency in linear voltage regulation. With its combination of low dropout operation, high PSRR, and built-in safety features, this 5V regulator offers engineers a reliable foundation for developing robust electronic systems. Whether you're designing precision instrumentation, automotive control modules, or next-generation IoT devices, this regulator provides the stable power foundation needed for optimal circuit performance.

Tags: Linear Voltage Regulator, 5V Power Supply, Low Dropout Regulator, 250mA IC, Surface Mount IC