LM317AT

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LM317AT

IC REG LIN POS ADJ 1.5A TO220-3

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  • Mfr.부분 #LM317AT
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사양

Part Status Obsolete
Base Product Number LM317
Output Configuration Positive
Output Type Adjustable
Number of Regulators 1
Voltage - Input (Max) 40V
Voltage - Output (Min/Fixed) 1.25V
Voltage - Output (Max) 37V
Current - Output 1.5A
Current - Quiescent (Iq) 10 mA
PSRR 80dB ~ 65dB (120Hz)
Protection Features Over Current, Over Temperature, Short Circuit
Operating Temperature -40°C ~ 125°C
Mounting Type Through Hole
Package TO-220-3
Supplier Device Package TO-220-3
Packaging Tube

개요

Description

The LM317AT is a versatile, adjustable three-terminal voltage regulator designed to provide a stable output voltage that can be adjusted from 1.25V to 37V with an output current up to 1.5A. It is part of the LM317 series, commonly used in various electronic projects and applications for its reliable performance and ease of use.
Key features of the LM317AT include thermal overload protection, short-circuit protection, and safe area protection, ensuring robustness against over-temperature and over-current conditions. The device requires only two external resistors to set the output voltage, making it simple to configure for different applications.
The LM317AT is widely used in power supply circuits for its ability to handle moderate power levels and its high regulation performance with a dropout voltage of about 3V. It is available in a TO-220 package, which provides good thermal performance with the option to attach a heatsink for improved heat dissipation. This makes it suitable for use in consumer electronics, industrial equipment, and various DIY electronics projects.

Features

The LM317AT is a versatile three-terminal adjustable voltage regulator. Its key features include:
1. Output Voltage Range: Adjustable from 1.25V to 37V.
2. Output Current Capability: Can deliver output currents up to 1.5A.
3. Line Regulation: Typically 0.01% per volt, ensuring stable performance across varying input voltages.
4. Load Regulation: Typically 0.1%, maintaining consistent output with changing loads.
5. Thermal Overload Protection: Safeguards against overheating, enhancing reliability.
6. Short-Circuit Protection: Prevents damage from output shorts by limiting current.
7. Floating Operation: Allows for high-voltage applications beyond the input voltage range.
8. Component Simplicity: Requires only two external resistors for setting the output voltage.
9. Operational Temperature: Suitable for a wide temperature range, ensuring robustness in various environments.
These features make the LM317AT ideal for applications requiring adjustable and reliable voltage regulation, including power supplies and battery chargers.

Package

The LM317AT is typically available in a TO-220 package. This package type is designed for easy mounting on a heat sink to improve thermal performance, making it suitable for power applications involving the adjustable voltage regulator function that the LM317AT provides.

Pinout

The LM317AT is a three-terminal adjustable voltage regulator. It is designed to provide a stable output voltage that can be adjusted from 1.25V to 37V, with an output current capability of up to 1.5A.
The pin count of the LM317AT is three, with the following functions:
1. Input (IN): This pin receives the input voltage, which must be higher than the desired output voltage. It provides the necessary power for the regulation process.
2. Output (OUT): This pin delivers the regulated output voltage, which can be adjusted using external resistors connected to the ADJ pin.
3. Adjustment (ADJ): This pin is used to set the output voltage. By connecting a resistor network between the OUT and ADJ pins, you can adjust the LM317's output voltage based on the desired application.
The LM317AT is popular in various applications due to its ease of use, reliability, and wide operating voltage range.

Manufacturer

The LM317AT is primarily manufactured by Texas Instruments, a major American technology company. Texas Instruments is renowned for its design and production of semiconductors and various integrated circuits, which are widely utilized across different electronic devices. The company is a leading player in the global semiconductor industry and is heavily involved in the development of analog chips and embedded processors, among other electronic components.

Application

The LM317AT is a versatile adjustable voltage regulator used in various applications. It provides a stable output voltage, making it ideal for power supply circuits, battery chargers, and voltage regulation in electronic devices. It's often used in DIY electronics projects, prototyping, and as a component in consumer electronics for linear regulation. The LM317AT can also be found in communication equipment, industrial instrumentation, and automotive applications where precise voltage control is necessary. Its adjustable output and protection features make it suitable for diverse power management solutions.

Equivalent

The LM317AT is a popular adjustable voltage regulator. Equivalent products include the LM317 from other manufacturers, such as Texas Instruments, ON Semiconductor, and STMicroelectronics. Other equivalent chips may include the L78xx series (for fixed voltage outputs) or the LM350, which offers higher current capacity. Ensure compatibility with your specific requirements by checking the datasheets for each alternative.

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