STMicroelectronics

L4931CDT50  

Linear & Switching Voltage Regulators

L4931CDT50 Description

The L4931CDT50 is a linear voltage regulator designed by STMicroelectronics, featuring a fixed output voltage of 5V and a maximum output current of 250mA. This regulator is housed in a DPAK package, which is ideal for surface mount applications. Despite being marked as obsolete, the L4931CDT50 remains a reliable choice for applications requiring a stable power supply with a low dropout voltage.

L4931CDT50 Features

• Fixed Output Voltage: The L4931CDT50 provides a stable 5V output, ensuring consistent power delivery to connected devices.
• Low Dropout Voltage: With a maximum dropout voltage of 0.8V at 250mA, this regulator can maintain its output voltage even when the input voltage is close to the output voltage, making it suitable for applications with tight voltage margins.
• High Power Supply Rejection Ratio (PSRR): The regulator boasts a PSRR of 70dB to 55dB across frequencies from 120Hz to 10kHz, effectively filtering out noise from the power supply and ensuring clean output voltage.
• Protection Features: The L4931CDT50 includes over-current and over-temperature protection, safeguarding both the regulator and connected components from damage due to excessive current or heat.
• Low Quiescent Current: A quiescent current of just 1mA ensures minimal power consumption during standby, making this regulator energy-efficient.
• Compliance and Packaging: The L4931CDT50 is REACH unaffected and RoHS3 compliant, ensuring it meets environmental and safety standards. It is available in a tube package, facilitating easy handling and storage.

L4931CDT50 Applications

The L4931CDT50 is well-suited for a variety of applications where a stable 5V supply is required. Its low dropout voltage and high PSRR make it ideal for use in:

• Embedded Systems: Providing a reliable power supply for microcontrollers and other low-power devices.
• Consumer Electronics: Ensuring stable power for devices such as portable media players and digital cameras.
• Industrial Equipment: Supplying power to sensors and control circuits in industrial settings.
• Telecommunications: Powering low-voltage components in communication devices and infrastructure.

Conclusion of L4931CDT50

The L4931CDT50, despite its obsolete status, remains a robust and reliable linear voltage regulator. Its combination of a fixed 5V output, low dropout voltage, and high PSRR makes it a standout choice for applications requiring stable and efficient power delivery. The inclusion of over-current and over-temperature protection further enhances its reliability and safety. While newer models may offer additional features, the L4931CDT50 continues to be a dependable option for engineers and designers seeking a straightforward, high-performance regulator.

L4931CDT50 Documents

Download datasheets and manufacturer documentation for L4931CDT50

Datasheets :

L4931ABxx, L4931Cxx      

HTML Datasheet :

L4931ABxx, L4931Cxx