LM317LZ/LFT3

The LM317LZ/LFT3 is a versatile adjustable voltage regulator manufactured by Texas Instruments. It is part of the LM317 family, which is widely recognized for its reliability and performance in various electronic applications. Here’s a detailed description of its features and specifications:

General Overview:

• Type: Adjustable Linear Voltage Regulator
• Package: Typically available in a small form factor, such as the TO-220 or SOT-223 package, which allows for easy integration into compact circuit designs.
• Manufacturer: Texas Instruments, a leading company in semiconductor manufacturing known for high-quality electronic components.

Key Features:

• Output Voltage Range: The LM317LZ/LFT3 can provide an adjustable output voltage ranging from 1.25V to 37V, making it suitable for a wide variety of applications.
• Output Current: It can deliver up to 100 mA of output current, which is sufficient for many low to moderate power applications.
• Line Regulation: The device exhibits excellent line regulation, ensuring that variations in input voltage do not significantly affect the output voltage.
• Load Regulation: It also features good load regulation, maintaining a stable output voltage even when the load current changes.
• Thermal Protection: The LM317LZ/LFT3 includes built-in thermal overload protection, which prevents damage to the device in case of overheating.
• Short-Circuit Protection: It is designed to protect against short circuits, ensuring that the device can handle fault conditions without failure.

Electrical Characteristics:

• Input Voltage Range: The input voltage can be as high as 40V, allowing for a wide range of input power sources.
• Dropout Voltage: The dropout voltage is typically around 1.5V, which means that the input voltage must be at least 1.5V higher than the desired output voltage for proper regulation.
• Temperature Range: The operating temperature range is typically from -40°C to +125°C, making it suitable for use in various environmental conditions.

Applications:

The LM317LZ/LFT3 is commonly used in:

• Power supply circuits for microcontrollers and other digital devices.
• Battery chargers where adjustable output voltage is required.
• Voltage regulation in automotive and industrial applications.
• DIY electronics projects and prototyping.

Pin Configuration:

The LM317LZ/LFT3 typically has three pins:

1. Input (Vin): The pin where the input voltage is applied.
2. Output (Vout): The pin that provides the regulated output voltage.
3. Adjust (Adj): This pin is used to set the output voltage by connecting it to a voltage divider made of resistors.

Conclusion:

The LM317LZ/LFT3 from Texas Instruments is a reliable and flexible adjustable voltage regulator that is ideal for a variety of electronic applications. Its combination of adjustable output, thermal protection, and ease of use makes it a popular choice among engineers and hobbyists alike. Whether used in a simple power supply or a more complex circuit, the LM317LZ/LFT3 provides stable and efficient voltage regulation.