STMicroelectronics

L4993D

L4993D Description

The L4993D from STMicroelectronics is a high-performance fixed 5V linear voltage regulator designed for automotive-grade applications. With an input voltage range up to 31V and a 150mA output current, it delivers stable power in demanding environments. The device features low dropout voltage (0.4V @ 150mA) and low quiescent current (125 µA), ensuring efficiency in battery-powered systems. Its 55dB PSRR (100Hz) minimizes noise, making it ideal for sensitive analog and digital circuits. Packaged in an 8-pin SOIC (Surface Mount), the L4993D integrates reset and watchdog functions, along with over-temperature and short-circuit protection, enhancing system reliability.

L4993D Features

• Fixed 5V output with ±2% accuracy for precision regulation.
• Wide input range (up to 31V), suitable for automotive and industrial power supplies.
• Low dropout (0.4V @ 150mA) maximizes efficiency in low-voltage conditions.
• Ultra-low quiescent current (125 µA) extends battery life in portable devices.
• High PSRR (55dB @ 100Hz) reduces noise for clean power delivery.
• Integrated watchdog and reset control for robust system monitoring.
• Protection features: Over-temperature, short-circuit, and reverse polarity protection.
• Automotive-grade reliability with AEC-Q100 compliance.
• RoHS3 and REACH compliant, meeting environmental standards.

L4993D Applications

The L4993D excels in automotive electronics, such as ECUs, infotainment systems, and sensors, where stable voltage regulation is critical. Its watchdog timer ensures fail-safe operation in safety-critical systems. It’s also ideal for industrial control systems, battery-powered IoT devices, and embedded computing, where low power consumption and high noise immunity are essential. The surface-mount package makes it suitable for compact PCB designs in space-constrained applications.

Conclusion of L4993D

The L4993D stands out as a high-reliability, low-power linear regulator with advanced monitoring and protection features. Its automotive-grade robustness, combined with low dropout and high PSRR, makes it a superior choice for mission-critical applications. Whether in automotive, industrial, or portable electronics, the L4993D delivers efficient, noise-free power while ensuring long-term durability. For engineers seeking a compact, feature-rich regulator, the L4993D is an optimal solution.