STMicroelectronics

L7809ACD2T-TR

L7809ACD2T-TR Description

The L7809ACD2T-TR is a fixed positive linear voltage regulator designed by STMicroelectronics, a leading manufacturer of semiconductor devices. This regulator is part of the L7809 series and is housed in a D2PAK surface-mount package, making it suitable for a variety of applications where space is a critical factor. Despite being marked as obsolete, the L7809ACD2T-TR remains a reliable choice for power supply solutions due to its robust design and performance characteristics.

L7809ACD2T-TR Features

• Output Type: Fixed positive output voltage, providing a stable 9V supply.
• Input Voltage Range: Capable of handling input voltages up to 35V, ensuring compatibility with a wide range of power sources.
• Output Current: Delivers a maximum output current of 1.5A, making it suitable for applications requiring moderate power levels.
• Dropout Voltage: A typical dropout voltage of 2V at 1A ensures efficient operation even at lower input voltages.
• Low Quiescent Current: Consumes only 6 mA in quiescent mode, minimizing power loss during standby.
• High PSRR: A power supply rejection ratio (PSRR) of 61dB at 120Hz helps in filtering out noise from the input supply, ensuring clean output voltage.
• Protection Features: Built-in over-temperature and short-circuit protection enhance reliability and safeguard the regulator from damage.
• Operating Temperature: Designed to operate within a temperature range of 0°C to 125°C, making it suitable for industrial and automotive applications.
• Compliance: RoHS3 compliant and REACH unaffected, ensuring environmental safety and regulatory compliance.
• Packaging: Available in a D2PAK surface-mount package, which is ideal for compact designs and high-density PCB layouts.
• Moisture Sensitivity Level: MSL 1 (Unlimited), indicating it is not sensitive to moisture, which is beneficial for manufacturing processes.

L7809ACD2T-TR Applications

The L7809ACD2T-TR is well-suited for a variety of applications due to its fixed positive output voltage and robust performance features. Some specific use cases include:

• Consumer Electronics: Ideal for powering devices such as radios, amplifiers, and other consumer electronics that require a stable 9V supply.
• Industrial Equipment: Suitable for industrial control systems, sensors, and actuators that operate within the specified temperature and voltage ranges.
• Automotive Systems: Given its wide operating temperature range and robust design, it can be used in automotive applications where reliability and durability are paramount.
• Telecommunications: Can be employed in telecom equipment requiring a stable power supply to ensure consistent performance.
• Medical Devices: Applicable in medical equipment where a reliable and stable power source is crucial for accurate operation.

Conclusion of L7809ACD2T-TR

The L7809ACD2T-TR is a versatile linear voltage regulator that offers a reliable and efficient power supply solution for a wide range of applications. Its fixed positive output voltage, combined with features such as low dropout voltage, high PSRR, and built-in protection mechanisms, make it a robust choice for designers looking for a stable power source. Despite being marked as obsolete, its continued availability and performance characteristics ensure that it remains a viable option for applications requiring a 9V, 1.5A regulator. The D2PAK surface-mount package further enhances its suitability for modern, space-constrained designs.