STMicroelectronics

L4931ABDT33

L4931ABDT33 Description

The L4931ABDT33 is a fixed linear voltage regulator designed by STMicroelectronics. It features a maximum input voltage of 20V and delivers a stable output voltage of 3.3V with a maximum output current of 250mA. This regulator is housed in a DPAK package, which is suitable for surface mount applications. Despite being marked as obsolete, the L4931ABDT33 remains a reliable choice for applications requiring a fixed positive output configuration. It offers a low dropout voltage of 0.8V at 250mA, ensuring efficient power regulation even under varying load conditions. The regulator is designed with over current and over temperature protection features, enhancing its reliability and safety in operation.

L4931ABDT33 Features

• Fixed Output Voltage: Provides a stable 3.3V output, ideal for applications requiring a consistent power supply.
• Low Dropout Voltage: With a maximum dropout voltage of 0.8V at 250mA, it ensures efficient power conversion even at low input-to-output voltage differentials.
• Over Current and Over Temperature Protection: These protection features safeguard the regulator and connected circuits from damage due to excessive current or temperature.
• High PSRR: A Power Supply Rejection Ratio (PSRR) ranging from 73dB to 55dB (120Hz to 10kHz) ensures minimal noise and ripple in the output voltage.
• Low Quiescent Current: Consumes only 1mA in quiescent state, making it suitable for low power applications.
• Surface Mount DPAK Package: The DPAK package is designed for surface mount technology, providing a compact and robust solution for PCB assembly.
• Compliance: The L4931ABDT33 is REACH unaffected and RoHS3 compliant, ensuring it meets environmental and safety standards.

L4931ABDT33 Applications

The L4931ABDT33 is well-suited for a variety of applications where a stable and efficient power supply is required. Its fixed 3.3V output and low dropout voltage make it ideal for:

• Embedded Systems: Providing a stable power supply for microcontrollers, sensors, and other low power devices.
• Communication Devices: Ensuring reliable power for RF modules and other communication components.
• Consumer Electronics: Suitable for portable devices and appliances requiring a fixed voltage supply.
• Industrial Controls: Ideal for PLCs, sensors, and actuators that need a stable and efficient power source.

Conclusion of L4931ABDT33

The L4931ABDT33 is a robust and reliable linear voltage regulator that offers a stable 3.3V output with a maximum current of 250mA. Its low dropout voltage and high PSRR make it an efficient choice for applications requiring minimal power loss and noise. Despite being marked as obsolete, its features and performance benefits continue to make it a viable option for various electronic applications. The DPAK package and surface mount design ensure ease of integration into modern PCB designs. With its over current and over temperature protection, the L4931ABDT33 provides a safe and reliable power solution, making it a preferred choice for designers and engineers in the electronics industry.