STMicroelectronics

L4979D  

Linear & Switching Voltage Regulators

L4979D Description

The L4979D from STMicroelectronics is a high-performance fixed 5V linear voltage regulator designed for precision power management in low-power applications. With an input voltage range up to 31V and a 150mA output current capability, it provides stable voltage regulation with a low dropout voltage of 0.4V at full load. The device integrates advanced control and protection features, including enable/disable functionality, reset, and watchdog timer, making it ideal for systems requiring reliability and fault monitoring. Its ultra-low quiescent current (20 µA) and high PSRR (55dB at 100Hz) ensure efficient operation in noise-sensitive environments. Packaged in an 8-pin SOIC (Surface Mount), the L4979D is RoHS3 compliant and suitable for industrial, automotive, and consumer electronics.

L4979D Features

• Fixed 5V Output: Ensures stable voltage regulation for low-power circuits.
• Wide Input Range (Up to 31V): Supports high-voltage applications with transient tolerance.
• Low Dropout (0.4V @ 150mA): Minimizes power loss and improves efficiency.
• Advanced Control Features: Includes enable pin, reset, and watchdog timer for system reliability.
• Protection Mechanisms: Over-temperature and short-circuit protection enhance durability.
• Low Quiescent Current (20 µA): Optimized for battery-powered and energy-efficient designs.
• High PSRR (55dB): Reduces noise interference in sensitive analog/digital systems.
• Surface-Mount Package (8SO): Compact and suitable for space-constrained PCB layouts.

L4979D Applications

• Automotive Electronics: Power supply for sensors, infotainment, and control modules.
• Industrial Systems: Voltage regulation in PLCs, instrumentation, and low-power actuators.
• Consumer Electronics: Used in smart home devices, wearables, and portable gadgets.
• Embedded Systems: Ideal for microcontrollers, FPGAs, and IoT nodes requiring stable 5V rails.
• Battery-Powered Devices: Efficient power management in handheld and remote monitoring equipment.

Conclusion of L4979D

The L4979D stands out as a robust, feature-rich linear regulator with low power consumption, high reliability, and integrated safety mechanisms. Its combination of wide input range, low dropout, and advanced control features makes it superior to basic regulators, particularly in automotive and industrial applications where system integrity is critical. For engineers seeking a compact, efficient, and protected 5V regulator, the L4979D delivers an optimal balance of performance and durability.

L4979D Documents

Download datasheets and manufacturer documentation for L4979D

Datasheets :

L4979(M)D      

PCN Packaging :

Box Label Chg 28/Jul/2016      

Other Related Documents :

L4979D View All Specifications      

HTML Datasheet :

L4979(M)D