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L4931CD25-TR Description
L4931CD25-TR Description
The L4931CD25-TR is a fixed-output linear regulator designed by STMicroelectronics, a leading manufacturer in the field of power management integrated circuits (PMIC). This regulator is part of the L4931 family and is specifically tailored for applications requiring a stable 2.5V output voltage with a maximum output current of 250mA. The device is housed in an 8SO package and is available in a surface-mount configuration, making it suitable for compact and efficient PCB designs.
L4931CD25-TR Features
- Output Type: Fixed, ensuring a stable 2.5V output voltage.
- Input Voltage Range: Capable of handling input voltages up to 20V, providing flexibility in power supply options.
- Output Current: Delivers a maximum output current of 250mA, ideal for low to medium power applications.
- Number of Regulators: Features a single regulator, simplifying design and reducing component count.
- Output Configuration: Positive output voltage, suitable for a wide range of electronic circuits.
- Supply Current: Maximum supply current of 6mA, ensuring efficient power usage.
- Dropout Voltage: Low dropout voltage of 0.8V at 250mA, enhancing performance under low input voltage conditions.
- Quiescent Current: Low quiescent current of 1mA, contributing to high efficiency in standby mode.
- Power Supply Rejection Ratio (PSRR): Ranges from 75dB 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 device and connected components from damage.
- Compliance: REACH unaffected and ROHS3 compliant, ensuring environmental safety and regulatory adherence.
- Moisture Sensitivity Level (MSL): MSL 1 (Unlimited), suitable for various manufacturing environments.
- Packaging: Available in tape and reel (TR) format, facilitating automated assembly processes.
L4931CD25-TR Applications
The L4931CD25-TR is well-suited for a variety of applications where a stable and efficient power supply is crucial. Its fixed 2.5V output and 250mA current capability make it ideal for:
- Consumer Electronics: Powering low-power devices such as smartphones, tablets, and wearable technology.
- Industrial Equipment: Providing stable power to sensors, actuators, and control systems.
- Communication Devices: Ensuring reliable power supply for routers, modems, and other networking equipment.
- Automotive Electronics: Suitable for in-vehicle infotainment systems and electronic control units (ECUs).
- Medical Devices: Powering portable medical devices and diagnostic equipment where precision and reliability are paramount.
Conclusion of L4931CD25-TR
The L4931CD25-TR from STMicroelectronics is a robust and efficient linear regulator designed for applications requiring a fixed 2.5V output and up to 250mA of current. Its low dropout voltage, high PSRR, and comprehensive protection features make it a reliable choice for a wide range of electronic systems. Despite being marked as obsolete, the L4931CD25-TR remains a viable option for legacy systems and new designs where its specific attributes are required. Its compliance with REACH and ROHS3 standards ensures it meets environmental and regulatory requirements, making it a responsible choice for modern electronics.



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