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LM317TG

Name: LM317TG
Rating: 4.7 (12 reviews)

LINEAR VOLTAGE REGULATOR, 1.5 A

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Mfr。パート #LM317TG
パッケージ TO-220
データシート
在庫中5491

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仕様

Package	0
Series	Bulk
OutputConfiguration	Active

概要

Description

The LM317TG is a popular adjustable voltage regulator integrated circuit (IC) used in electronic circuits to maintain a stable output voltage despite variations in input voltage and load conditions. It is part of the LM317 family and is commonly packaged in a TO-220 or TO-92 form. The LM317TG can output a voltage range from 1.25V to 37V, with a maximum output current of 1.5A, making it suitable for a wide array of applications.
Key features include internal current limiting, thermal overload protection, and safe area compensation, which enhance its reliability and performance. The output voltage is adjusted using a pair of external resistors connected to the regulator. Its versatility, ease of use, and protection features make the LM317TG suitable for use in power supplies, battery chargers, and other electronic devices requiring a stable voltage output.
Overall, the LM317TG is valued for its flexibility and robustness, providing a stable and adjustable voltage solution for various electronic applications.

Features

The LM317TG is a versatile, adjustable voltage regulator. Key features include:
1. Adjustable Output Voltage: Ranges from 1.25V to 37V, allowing for flexibility in various applications.
2. Output Current: Can deliver up to 1.5A, suitable for powering a wide range of devices.
3. Thermal Overload Protection: Prevents damage by shutting down the regulator if it overheats.
4. Current Limiting: Provides inherent short-circuit protection by limiting the output current.
5. Safe Operating Area Protection: Ensures the device operates safely under all specified conditions.
6. Dropout Voltage: Typically requires a minimum input-output difference of 3V to maintain regulation.
7. Line Regulation: Typically 0.01%/V.
8. Load Regulation: Typically 0.1%, ensuring stable output under varying loads.
9. Temperature Range: Operates effectively in a wide temperature range from -40°C to +125°C.
These features make the LM317TG a reliable choice for adjustable power supply applications in industrial, consumer, and electronic projects.

Package

The LM317TG is a voltage regulator typically available in a TO-220 package type. This package is designed for through-hole mounting and offers efficient heat dissipation, making it suitable for high-power applications.

Pinout

The LM317TG is a popular adjustable voltage regulator. It typically comes in a TO-220 package and has three pins:
1. Input (Pin 1): This is where the unregulated input voltage is applied. It should be higher than the desired output voltage by a certain margin (usually at least 3 volts) to ensure proper regulation.
2. Output (Pin 2): This pin provides the regulated output voltage. The output voltage is adjustable and can be set to any value between 1.25V and about 37V, depending on the input voltage and external resistors used.
3. Adjust (Pin 3): This pin is used to set the output voltage. By connecting a resistor between the output and adjust pins, and another resistor from the adjust pin to ground, you can determine the output voltage using the formula: Vout = 1.25V × (1 + R2/R1) + Iadj × R2, where Iadj is typically negligible.
The LM317TG is widely used in applications requiring a stable and adjustable power supply, thanks to its simplicity and versatility.

Manufacturer

The LM317TG is a voltage regulator manufactured by several semiconductor companies, including Texas Instruments and ON Semiconductor. Texas Instruments, commonly referred to as TI, is a global company known for designing and manufacturing semiconductors and various integrated circuits, which are used in a wide range of electronic devices. ON Semiconductor, now known as onsemi, is another leading semiconductor manufacturer specializing in power and signal management, logic, discrete, and custom devices for a broad array of applications. Both companies are key players in the electronics industry, providing crucial components for consumer electronics, industrial applications, and automotive systems, among others.

Application

The LM317TG is a versatile voltage regulator used in various applications such as power supplies, battery chargers, and adjustable voltage regulation systems. It's suitable for providing a stable voltage output in electronic circuits, making it ideal for DIY electronics projects, laboratory equipment, and embedded systems. Additionally, it can be used in current regulation applications and in devices requiring a reliable power source with adjustable voltages, such as LED drivers and sensor circuits. Its capability to drive a wide range of load currents makes it a popular choice in both consumer electronics and industrial applications.

Equivalent

The LM317TG is a popular adjustable voltage regulator. Equivalent products include the L78M05, UA78M05, NTE956, and KA317. These alternatives typically offer similar functionality, such as adjustable output voltage, thermal overload protection, and short-circuit protection. Always check the datasheets for exact specifications to ensure compatibility with your specific application.