onsemi

LM317MT

LM317MT Description

The LM317MT is a linear voltage regulator designed for a wide range of power management applications. Manufactured by onsemi, this device is part of the Power Management Integrated Circuit (PMIC) category. It features an adjustable output voltage, making it highly versatile for various electronic systems. The LM317MT is housed in a TO-220-3 package, which is suitable for through-hole mounting.

This regulator is designed to operate with a maximum input voltage of 40V and can deliver a maximum output current of 500mA. The output voltage is adjustable from a minimum of 1.2V up to a maximum of 37V, providing a wide range of voltage regulation options. The device is rated for an operating temperature range of 0°C to 125°C (TJ), making it suitable for use in environments with varying temperature conditions.

The LM317MT includes several protection features such as over-current, over-temperature, and short-circuit protection, ensuring reliable operation and safeguarding against potential faults. It has a quiescent current of 10 mA and offers a high power supply rejection ratio (PSRR) of 80dB at 120Hz, which helps in maintaining stable output voltage under varying input conditions.

LM317MT Features

• Adjustable Output Voltage: The LM317MT provides an adjustable output voltage ranging from 1.2V to 37V, making it suitable for a wide variety of applications requiring different voltage levels.
• High Input Voltage Range: With a maximum input voltage of 40V, the regulator can handle a broad range of input power sources, enhancing its versatility.
• Protection Features: The device includes over-current, over-temperature, and short-circuit protection, ensuring robust and reliable operation even under adverse conditions.
• High PSRR: The regulator offers a high power supply rejection ratio of 80dB at 120Hz, which helps in maintaining a stable output voltage despite fluctuations in the input voltage.
• Wide Operating Temperature Range: The LM317MT is designed to operate within a temperature range of 0°C to 125°C (TJ), making it suitable for use in various environmental conditions.
• Low Quiescent Current: The regulator has a low quiescent current of 10 mA, which is beneficial for applications where power consumption needs to be minimized.
• Through-Hole Mounting: The TO-220-3 package is designed for through-hole mounting, which is ideal for applications requiring robust mechanical stability and ease of installation.

LM317MT Applications

The LM317MT is ideal for a variety of applications due to its adjustable output voltage and robust protection features. Some specific use cases include:

• Power Supplies: The regulator can be used in adjustable power supplies for laboratory and industrial applications, providing a stable and reliable voltage source.
• Battery Chargers: The adjustable output voltage makes it suitable for charging different types of batteries, ensuring optimal charging conditions.
• Consumer Electronics: The LM317MT can be used in consumer electronics where a stable and adjustable voltage source is required, such as in audio amplifiers and LED lighting systems.
• Industrial Equipment: The wide operating temperature range and protection features make it suitable for use in industrial equipment where reliability and durability are critical.

Conclusion of LM317MT

The LM317MT is a versatile and reliable linear voltage regulator designed for a wide range of power management applications. Its adjustable output voltage, high input voltage range, and robust protection features make it an ideal choice for various electronic systems. Despite being marked as obsolete, the LM317MT continues to be a popular choice due to its proven performance and reliability. Its through-hole mounting and wide operating temperature range further enhance its suitability for applications requiring mechanical stability and operation in varying environmental conditions. For applications needing a stable and adjustable voltage source, the LM317MT remains a reliable and effective solution.