STMicroelectronics

L4949ED  

Linear & Switching Voltage Regulators

L4949ED Description

The L4949ED is a linear voltage regulator IC from STMicroelectronics, designed to provide a stable 5V output with a maximum current of 100mA. This fixed-output regulator features a single output configuration and is ideal for applications requiring a reliable and efficient power supply. With a maximum input voltage of 28V and a low dropout voltage of 0.5V at 100mA, the L4949ED ensures efficient power regulation even under varying input conditions.

L4949ED Features

• Output Type: Fixed, providing a stable 5V output voltage.
• Voltage - Input (Max): 28V, allowing for a wide range of input voltages.
• Current - Output: 100mA, suitable for low to medium current applications.
• Number of Regulators: 1, simplifying the design and reducing complexity.
• Output Configuration: Positive, providing a straightforward connection to the load.
• Current - Supply (Max): 5 mA, ensuring low power consumption in the supply line.
• Product Status: Obsolete, but still available for legacy applications.
• REACH Status: REACH Unaffected, complying with European chemical regulations.
• RoHS Status: ROHS3 Compliant, adhering to environmental and health standards.
• Moisture Sensitivity Level (MSL): 3 (168 Hours), ensuring reliable performance in various environmental conditions.
• Current - Quiescent (Iq): 300 µA, minimizing power loss in standby mode.
• Mounting Type: Surface Mount
• Control Features: Reset Output, providing a signal to indicate the regulator's status.
• Protection Features: Over Temperature and Short Circuit, safeguarding the device and the system.

L4949ED Applications

The L4949ED is well-suited for applications where a stable 5V power supply is required, such as:

• Portable Electronics: Powering low-power circuits in devices like calculators, watches, and remote controls.
• Industrial Controls: Providing a reliable power source for sensors and control systems in industrial environments.
• Telecommunications:，。
• Automotive Electronics: Powering low-current circuits in vehicles, such as infotainment systems and sensor interfaces.

Conclusion of L4949ED

The L4949ED is a reliable and efficient linear voltage regulator, offering a stable 5V output with low dropout and quiescent currents. Its single output configuration simplifies design, while its protection features ensure device and system safety. Although it is now considered obsolete, the L4949ED remains a viable option for legacy applications and those requiring a simple, reliable power supply solution. Its compliance with environmental standards and low power consumption make it an attractive choice for a variety of applications in the electronics industry.

L4949ED Documents

Download datasheets and manufacturer documentation for L4949ED

Datasheets :

L4949E      

HTML Datasheet :

L4949E