STMicroelectronics

L4931CD50

L4931CD50 Description

The L4931CD50 is a fixed output linear regulator IC designed by STMicroelectronics, a leading manufacturer in the power management sector. This IC is part of the L4931 series and is specifically tailored for applications requiring a stable 5V output voltage with a maximum output current of 250mA. The regulator is housed in an 8SO package and is suitable for surface mount applications, making it ideal for compact and space-constrained designs. Despite being marked as obsolete, the L4931CD50 remains a reliable choice for legacy systems and specific applications where its unique features are advantageous.

L4931CD50 Features

• Output Type: Fixed, ensuring a stable 5V output voltage.
• Input Voltage Range: Capable of handling up to 20V input voltage, providing flexibility in power supply options.
• Output Current: Delivers a maximum output current of 250mA, suitable for low to medium power applications.
• Low Dropout Voltage: Features a maximum dropout voltage of 0.8V at 250mA, allowing efficient operation even at low input-to-output voltage differences.
• Low Quiescent Current: Consumes only 1mA in quiescent state, minimizing power loss and enhancing overall efficiency.
• High Power Supply Rejection Ratio (PSRR): Offers a PSRR of 70dB to 55dB across frequencies from 120Hz to 10kHz, ensuring excellent noise rejection and stable output.
• Protection Features: Includes over-current and over-temperature protection, safeguarding the IC and connected circuits from potential damage.
• Compliance: Meets REACH and RoHS3 compliance standards, ensuring environmental safety and regulatory adherence.
• Moisture Sensitivity Level (MSL): Rated MSL 1 (Unlimited), making it suitable for various manufacturing environments without moisture-related concerns.

L4931CD50 Applications

The L4931CD50 is well-suited for a variety of applications where a reliable and efficient power supply is essential. Its fixed 5V output and 250mA current capability make it ideal for:

• Consumer Electronics: Powering small devices such as portable audio players, handheld gaming consoles, and other low-power peripherals.
• Industrial Equipment: Providing stable power to sensors, microcontrollers, and other low-power components in industrial control systems.
• Telecommunications: Supplying power to low-power modules in communication devices and infrastructure.
• Automotive: Suitable for powering ancillary systems in vehicles where a stable 5V supply is required.
• Legacy Systems: Ideal for maintaining compatibility with older systems that rely on this specific regulator.

Conclusion of L4931CD50

The L4931CD50 from STMicroelectronics is a robust and reliable linear regulator designed for applications requiring a stable 5V output and up to 250mA current. Its low dropout voltage, high PSRR, and protection features make it a standout choice in its category. Despite being obsolete, the L4931CD50 continues to offer significant advantages in terms of efficiency, stability, and reliability. Its compliance with environmental and safety standards further enhances its suitability for a wide range of applications. For designers and engineers working with legacy systems or specific low-power applications, the L4931CD50 remains a viable and effective solution.