onsemi

L4949DR2G  

Linear & Switching Voltage Regulators

L4949DR2G Description

The L4949DR2G is a linear voltage regulator IC from onsemi, designed to provide a stable 5V output with a maximum current of 100mA. This fixed-output regulator features a single positive output and is designed for surface mount applications. With a maximum input voltage of 28V and a low dropout voltage of 0.5V at 100mA, the L4949DR2G offers reliable performance in various electronic systems.

L4949DR2G Features

• Fixed 5V Output: Provides a stable and consistent 5V output voltage.
• 100mA Output Current: Capable of sourcing up to 100mA of current to the load.
• Single Positive Output: Simplifies circuit design with a single output configuration.
• Low Dropout Voltage: 0.5V at 100mA ensures stable operation even with low input voltages.
• Over Temperature and Short Circuit Protection: Enhances reliability and prevents damage to the IC.
• Reset Control Feature: Allows for system reset functionality.
• Low Quiescent Current: 260 µA minimizes power consumption in standby modes.
• REACH Unaffected: Compliant with European chemical regulations.

L4949DR2G Applications

The L4949DR2G is ideal for applications requiring a stable 5V supply with low quiescent current and protection features. Some specific use cases include:

1. Portable Electronics: Powering low-power circuits in mobile devices and wearables.
2. Industrial Control Systems: Providing a stable power supply for microcontrollers and sensors.
3. Telecommunications Equipment: Ensuring reliable operation of communication modules and interfaces.
4. Automotive Electronics: Powering low-current loads in automotive infotainment and control systems.

Conclusion of L4949DR2G

The L4949DR2G is a reliable and efficient linear voltage regulator, offering a fixed 5V output with low dropout voltage and protection features. Its low quiescent current and single positive output make it suitable for a wide range of applications, from portable electronics to industrial control systems. While the L4949DR2G is now considered obsolete, it remains a popular choice for its performance benefits and unique features in comparison to similar models.

L4949DR2G Documents

Download datasheets and manufacturer documentation for L4949DR2G

Datasheets :

L4949, NCV4949      

PCN Obsolescence/ EOL :

Multiple Devices 02/Aug/2010      

HTML Datasheet :

L4949, NCV4949      

Environmental Information :

onsemi RoHS