L4949EDTR-E

Overview of STMicroelectronics L4949EDTR-E

The L4949EDTR-E is a high-performance linear voltage regulator designed by STMicroelectronics, specifically tailored for automotive and industrial applications. This device is known for its reliability, efficiency, and ability to provide a stable output voltage under varying load conditions. The L4949EDTR-E is particularly suitable for powering microcontrollers, sensors, and other electronic components that require a consistent voltage supply.

Key Specifications

- Input Voltage Range: 5 V to 40 V
- Output Voltage: 5 V (fixed)
- Maximum Output Current: 1.5 A
- Dropout Voltage: 0.5 V (typical at 1.5 A)
- Line Regulation: 0.1% (typical)
- Load Regulation: 0.5% (typical)
- Quiescent Current: 5 mA (typical)
- Operating Temperature Range: -40 °C to +125 °C
- Package Type: TO-220

Electrical Characteristics

The L4949EDTR-E operates over a wide input voltage range of 5 V to 40 V, making it versatile for various applications where the input voltage may vary significantly. The fixed output voltage of 5 V is ideal for powering digital circuits, microcontrollers, and other electronic devices that require a stable voltage supply. With a maximum output current of 1.5 A, the regulator can efficiently handle multiple loads, making it suitable for complex systems.

Performance Metrics

The dropout voltage of 0.5 V at 1.5 A indicates that the L4949EDTR-E can maintain a stable output voltage even when the input voltage approaches the output voltage. This characteristic is particularly important in battery-operated devices, where maintaining performance as the battery discharges is crucial. The line regulation of 0.1% and load regulation of 0.5% ensure that the output voltage remains stable under varying input conditions and load changes, providing reliable performance in demanding applications.

Thermal Performance

The L4949EDTR-E is designed to operate in harsh environments, with an operating temperature range of -40 °C to +125 °C. This wide temperature range ensures reliable performance in automotive applications, where components may be exposed to extreme temperatures. The TO-220 package allows for effective heat dissipation, which is essential for maintaining performance and reliability under high load conditions.

Protection Features

The L4949EDTR-E includes several built-in protection features to enhance reliability and safety:

- Overcurrent Protection (OCP): Prevents damage to the device and connected loads during fault conditions.
- Thermal Shutdown: Automatically disables the regulator if the junction temperature exceeds safe limits, preventing overheating.
- Reverse Polarity Protection: Protects the device from damage if the input voltage is connected with reverse polarity.

Applications

The L4949EDTR-E is versatile and can be used in various applications, including:

- Automotive Electronics: Ideal for powering sensors, control units, and infotainment systems in vehicles.
- Industrial Equipment: Suitable for use in industrial automation systems and control circuits.
- Consumer Electronics: Employed in devices requiring stable power supplies, such as home appliances and smart devices.
- Telecommunications: Used in communication equipment that demands reliable voltage regulation.

Conclusion

The STMicroelectronics L4949EDTR-E is a robust linear voltage regulator that offers excellent performance and reliability for a wide range of applications. With its impressive specifications, including a wide input voltage range, low dropout voltage, and built-in protection features, it is an ideal choice for engineers looking to implement reliable power management solutions. Its adaptability across various environments makes it a valuable component in modern electronic designs, ensuring optimal performance in automotive and industrial applications.