STMicroelectronics

L4931CD120-TR

L4931CD120-TR Description

The L4931CD120-TR is a linear regulator IC designed by STMicroelectronics, offering a fixed output voltage of 12V with a maximum output current of 250mA. This regulator is housed in an 8SO package and is suitable for surface-mount applications. Despite being marked as obsolete, the L4931CD120-TR remains a reliable choice for power management in various electronic systems due to its robust design and performance characteristics.

L4931CD120-TR Features

• Output Type: Fixed at 12V, ensuring stable power supply to connected devices.
• Input Voltage Range: Capable of handling input voltages up to 20V, providing flexibility in power source selection.
• Output Current: Delivers a consistent 250mA, suitable for applications requiring moderate power.
• Low Dropout Voltage: With a maximum dropout voltage of 0.8V at 250mA, the regulator maintains efficiency even at lower input-to-output voltage differentials.
• Low Quiescent Current: Features a quiescent current of only 1.6mA, minimizing power consumption during operation.
• High PSRR: Offers a power supply rejection ratio of 64dB to 55dB across a frequency range of 120Hz to 10kHz, ensuring minimal noise and ripple in the output voltage.
• Protection Features: Includes over-current and over-temperature protection, safeguarding the regulator and connected circuits from damage.
• Compliance: Meets REACH and RoHS3 compliance standards, ensuring environmental safety and regulatory adherence.
• Mounting Type: Surface mount, ideal for compact and space-efficient designs.
• Packaging: Supplied in tape and reel (TR) format, facilitating automated assembly processes.

L4931CD120-TR Applications

The L4931CD120-TR is well-suited for a variety of applications where a stable 12V supply is required. Its low dropout voltage and high PSRR make it particularly useful in applications with varying input voltages and noise-sensitive circuits. Specific use cases include:

• Consumer Electronics: Ideal for powering small devices such as portable audio equipment, where a stable and low-noise power supply is crucial.
• Industrial Equipment: Suitable for powering sensors and control modules that require a reliable 12V supply.
• Telecommunications: Can be used in low-power communication devices and modules, ensuring stable operation under varying input conditions.
• Automotive Applications: Applicable in automotive electronics where a fixed 12V supply is needed, such as in dashboard electronics and infotainment systems.

Conclusion of L4931CD120-TR

The L4931CD120-TR is a versatile linear regulator that offers a stable 12V output with a maximum current of 250mA. Its low dropout voltage, high PSRR, and protection features make it a reliable choice for various applications, despite its obsolete status. The regulator's compliance with environmental standards and its surface-mount package further enhance its suitability for modern electronics. While newer alternatives may exist, the L4931CD120-TR remains a dependable option for applications requiring a fixed 12V supply and moderate power output.