onsemi

L4949DG

L4949DG Description

The L4949DG is a linear voltage regulator designed by onsemi, offering a fixed output voltage of 5V with a maximum input voltage of 28V. This regulator is capable of delivering a stable 100mA output current, making it suitable for a variety of low-power applications. It features a low dropout voltage of 0.5V at 100mA, ensuring efficient operation even when the input voltage is close to the output voltage. The regulator is housed in a surface-mount 8SOIC package, which is ideal for compact designs and easy integration into modern electronic systems.

L4949DG Features

• Output Type: Fixed, providing a stable 5V output.
• Input Voltage Range: Up to 28V, offering flexibility in power supply options.
• Output Current: 100mA, suitable for low-power applications.
• Low Dropout Voltage: 0.5V at 100mA, enhancing efficiency in low-headroom applications.
• Supply Current: Maximum of 5mA, minimizing power consumption.
• Output Configuration: Positive, ensuring compatibility with a wide range of circuits.
• Control Features: Includes a reset function for reliable system operation.
• Protection Features: Over-temperature and short-circuit protection, safeguarding the regulator and connected components.
• Moisture Sensitivity Level: MSL 1 (Unlimited), suitable for various environmental conditions.
• Mounting Type: Surface mount, ideal for compact and space-constrained designs.
• Package: Tube, facilitating easy handling and storage.
• Product Status: Obsolete, but still available for legacy systems and specific applications.
• REACH Status: REACH Unaffected, ensuring compliance with environmental regulations.

L4949DG Applications

The L4949DG is well-suited for applications requiring a reliable and efficient fixed-voltage regulator. Its low dropout voltage and stable output current make it ideal for battery-powered devices, portable electronics, and embedded systems where power efficiency is critical. The regulator's compact 8SOIC package allows for easy integration into space-constrained designs, such as wearable devices, IoT sensors, and small form-factor electronics. Additionally, its over-temperature and short-circuit protection features ensure robustness and reliability in various operating conditions.

Conclusion of L4949DG

The L4949DG is a versatile linear voltage regulator that offers a balance of performance, efficiency, and reliability. Its fixed 5V output and low dropout voltage make it suitable for a wide range of low-power applications, while its compact surface-mount package and protection features ensure easy integration and robust operation. Although the product is now obsolete, it remains a valuable component for legacy systems and specific applications where its unique features and advantages are still highly beneficial.