STMicroelectronics

LF120ABDT  

Linear & Switching Voltage Regulators

LF120ABDT Description

The LF120ABDT is a linear voltage regulator designed by STMicroelectronics, featuring a fixed output voltage of 12V and a maximum output current of 500mA. This regulator is housed in a DPAK package, making it suitable for surface-mount applications. Despite its obsolescence, the LF120ABDT remains a reliable choice for applications requiring a stable power supply with a maximum input voltage of 16V. The regulator is designed with a dropout voltage of 0.7V at 500mA, ensuring efficient operation even at lower input voltages. It also includes over-current and over-temperature protection features, enhancing its robustness and reliability in various electronic systems.

LF120ABDT Features

• Fixed Output Voltage: Provides a stable 12V output, ideal for applications requiring a consistent power supply.
• High Output Current: Capable of delivering up to 500mA, making it suitable for a wide range of electronic devices.
• Low Dropout Voltage: With a maximum dropout voltage of 0.7V at 500mA, the LF120ABDT ensures efficient power conversion even at lower input voltages.
• Over-Current and Over-Temperature Protection: These features safeguard the regulator and connected components from potential damage due to excessive current or temperature.
• Low Quiescent Current: A quiescent current of 1.5mA ensures minimal power consumption during operation, enhancing overall system efficiency.
• High Power Supply Rejection Ratio (PSRR): Ranging from 69dB to 54dB across frequencies from 120Hz to 10kHz, the LF120ABDT effectively filters out noise from the input power supply.
• Surface Mount Compatibility: The DPAK package is designed for surface-mount applications, providing a compact and reliable solution for modern electronic designs.
• Compliance and Packaging: The LF120ABDT is REACH unaffected and ROHS3 compliant, ensuring it meets environmental and safety standards. It is available in a tube package, facilitating easy handling and integration.

LF120ABDT Applications

The LF120ABDT is well-suited for a variety of applications where a stable and efficient power supply is essential. Its fixed 12V output and 500mA current capability make it ideal for powering microcontrollers, sensors, and other low-power electronic devices. The regulator's low dropout voltage and high PSRR ensure minimal power loss and noise, making it suitable for applications requiring high precision and reliability. Specific use cases include:

• Powering Microcontrollers and Embedded Systems: The stable 12V output and high current capability make it an excellent choice for providing power to microcontrollers and other embedded systems.
• Sensor Applications: The LF120ABDT's low dropout voltage and high PSRR ensure minimal noise and efficient power delivery, making it suitable for powering sensitive sensors.
• Industrial Control Systems: The regulator's robust protection features and compliance with environmental standards make it suitable for use in industrial control systems where reliability and safety are paramount.

Conclusion of LF120ABDT

The LF120ABDT, despite being obsolete, remains a reliable and efficient linear voltage regulator for applications requiring a stable 12V output and up to 500mA of current. Its low dropout voltage, high PSRR, and robust protection features make it a standout choice in its category. While newer models may offer additional features, the LF120ABDT's proven performance and compatibility with surface-mount applications ensure it remains a viable option for designers seeking a dependable power solution.

LF120ABDT Documents

Download datasheets and manufacturer documentation for LF120ABDT