onsemi

LM317LZX

LM317LZX Description

The LM317LZX is a linear voltage regulator designed for adjustable output voltage applications. Manufactured by onsemi, this regulator offers a wide input voltage range up to 40V and an adjustable output voltage starting from 1.2V up to 37V. It is capable of delivering a maximum output current of 100mA, making it suitable for a variety of low-power applications. The LM317LZX features a positive output configuration and is housed in a TO92-3 package, which is ideal for through-hole mounting. Despite its small form factor, it provides robust protection features including over-current, over-temperature, and short-circuit protection. The regulator operates within a temperature range of 0°C to 125°C and has a quiescent current of 10mA. It also boasts a high power supply rejection ratio (PSRR) of 80dB at 120Hz, ensuring stable performance under varying input conditions. Although the LM317LZX is now considered obsolete, it remains a reliable choice for applications where its specific characteristics are required.

LM317LZX Features

• Adjustable Output Voltage: The LM317LZX provides an adjustable output voltage range from 1.2V to 37V, offering flexibility in power supply design.
• Wide Input Voltage Range: Capable of handling input voltages up to 40V, this regulator is suitable for a variety of power sources.
• Low Quiescent Current: With a quiescent current of only 10mA, the LM317LZX is energy-efficient, making it ideal for battery-powered applications.
• Robust Protection Features: Over-current, over-temperature, and short-circuit protection ensure reliable operation and protect the regulator from damage.
• High PSRR: A power supply rejection ratio of 80dB at 120Hz ensures stable output voltage even with noisy input sources.
• Through-Hole Mounting: The TO92-3 package is designed for through-hole mounting, simplifying PCB assembly and ensuring mechanical stability.
• Wide Operating Temperature Range: Suitable for operation from 0°C to 125°C, the LM317LZX can be used in a variety of environmental conditions.
• Moisture Sensitivity Level (MSL) 1: The regulator is unaffected by moisture, making it suitable for storage and use in humid environments.

LM317LZX Applications

The LM317LZX is well-suited for a range of applications due to its adjustable output voltage, low quiescent current, and robust protection features. Some specific use cases include:

• Battery Chargers: The adjustable output voltage and low quiescent current make it ideal for charging various types of batteries.
• Low-Power Devices: Suitable for powering small electronic devices and microcontrollers where a stable and adjustable power supply is required.
• Laboratory Power Supplies: The wide input and output voltage ranges allow it to be used in adjustable laboratory power supplies.
• Consumer Electronics: Ideal for applications such as portable radios, calculators, and other low-power consumer devices.
• Industrial Control Systems: The robust protection features and wide operating temperature range make it suitable for industrial applications where reliability is crucial.

Conclusion of LM317LZX

The LM317LZX is a versatile linear voltage regulator that offers a combination of adjustable output voltage, low quiescent current, and robust protection features. Despite being marked as obsolete, its unique characteristics make it a reliable choice for specific applications where these features are essential. Whether used in battery chargers, low-power devices, or industrial control systems, the LM317LZX provides stable and efficient power regulation. Its through-hole mounting and wide operating temperature range further enhance its suitability for a variety of electronic applications.