The LM317 series voltage regulators from ON Semiconductor are adjustable voltage regulators that can provide an output voltage of up to 37 V and an output current of up to 1.5 A. The LM317 is designed to operate over an input voltage range of up to 40 V, making it suitable for a wide range of applications. The LM317 series features thermal overload and short-circuit protection, which makes it reliable and durable. The device is also available in different package options, making it easy to integrate into different types of circuit designs. The LM317 voltage regulators can be used in applications such as power supplies, battery chargers, instrumentation, audio circuits, voltage regulators, and DC-to-DC converters.
Features
The main features of LM317 series Voltage Regulators may be summarized as follows:
1. Output Voltage: The LM317 voltage regulators are adjustable voltage regulators that provide an output voltage range from 1.25V to 37V DC.
2. Load Regulation: The LM317 series voltage regulators have good load regulation performance, which means that the output voltage remains stable even when the load current changes.
3. Line Regulation: The voltage regulators have excellent line regulation, which means that the output voltage remains constant even when the input voltage varies.
4. Thermal Overload Protection: The LM317 voltage regulators have built-in thermal overload protection that shuts down the device in case of overheating.
5. Short Circuit Protection: These voltage regulators also have built-in short-circuit protection that prevents damage to the device in case of a short circuit.
6. Low Dropout Voltage: The LM317 voltage regulators have a low dropout voltage, which means they can maintain a stable output voltage even when the input voltage is slightly higher than the desired output voltage.
7. Wide Operating Temperature Range: The LM317 voltage regulators can operate over a wide temperature range, from -40°C to +125°C.
8. Low Noise: These voltage regulators have a low noise output, which makes them suitable for use in noise-sensitive applications.
9. Adjustable Output Voltage: The output voltage of the LM317 voltage regulators can be adjusted using a simple voltage divider circuit.
Applications
Battery chargers
Power supplies
Instrumentation
Audio circuits
Voltage regulators
DC-to-DC converters
The LM317 can be used in a variety of power supply applications, such as linear regulators, battery chargers, and DC-DC converters. It provides a stable output voltage with low ripple and noise, making it ideal for sensitive electronic devices. The LM317 can be used as a voltage regulator for audio amplifiers to provide a stable and noise-free power supply. This helps to improve the quality of the audio output and reduce distortion.
