LM317LM

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LM317LM

IC REG LIN POS ADJ 100MA 8-SOIC

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Bảo hành 365 ngày

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Thông số kỹ thuật

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) 1.2V
Voltage - Output (Max) 37V
Current - Output 100mA
Current - Quiescent (Iq) 10 mA
PSRR 80dB (120Hz)
Protection Features Over Current, Over Temperature, Short Circuit
Operating Temperature 0°C ~ 125°C
Mounting Type Surface Mount
Package 8-SOIC (0.154", 3.90mm Width)
Supplier Device Package 8-SOIC
Packaging Tube

Tổng quan

Description

The LM317LM is a versatile, adjustable three-terminal voltage regulator capable of supplying up to 100mA of output current with an output voltage range of 1.25V to 37V. It is commonly used in power supply applications where a stable and adjustable output voltage is needed. The device features a built-in current limiting, thermal overload protection, and safe area compensation, ensuring reliable performance and protection against potential faults.
The output voltage is adjusted using two external resistors connected in a voltage divider configuration. This allows for easy customization based on specific requirements. The LM317LM offers excellent line and load regulation, making it suitable for various applications, including battery chargers, adjustable power supplies, and other electronic circuits requiring a stable voltage.
Housed in a TO-92 package, the LM317LM is compact and easy to integrate into both hobbyist and professional projects. It is widely appreciated for its simplicity, reliability, and cost-effectiveness, making it a popular choice among engineers and electronics enthusiasts.

Features

The LM317LM is a versatile, adjustable voltage regulator with several key features. It is capable of providing an output voltage range from 1.25V to 37V with a maximum output current of 100mA. The device is known for its ease of use, requiring only two external resistors to set the output voltage. It also includes internal current limiting, thermal overload protection, and safe area compensation, enhancing its reliability and preventing damage under fault conditions. The LM317LM has a typical line regulation of 0.01% and load regulation of 0.3%, ensuring stable output under varying input voltage and load conditions. It is also available in a variety of package options, suitable for different applications. These features make it ideal for a wide range of applications, including power supply design, adjustable power supplies, and battery chargers.

Package

The LM317LM is commonly available in a TO-220 package. This package type is designed to handle moderate power levels and is widely used for voltage regulators like the LM317.

Pinout

The LM317LM is a three-terminal adjustable voltage regulator. It is commonly used for voltage regulation in electronic circuits. The pin count and their functions are as follows:
1. Input (Pin 3): This is where the unregulated voltage is applied. The input voltage must be higher than the desired output voltage to ensure proper regulation.
2. Output (Pin 2): This pin provides the regulated voltage output. The output voltage can be set to a desired level using external resistors.
3. Adjust (Pin 1): This pin is used to adjust the output voltage. By connecting resistors between this pin and the output as well as between this pin and ground, you can set the output voltage to a specific value.
The LM317LM can output a voltage between 1.25V and 37V and can handle an output current up to 100 mA. The voltage difference between the input and output must remain within specified limits to ensure proper operation and avoid damage.

Manufacturer

The LM317LM is a voltage regulator commonly manufactured by several companies, including Texas Instruments, STMicroelectronics, and ON Semiconductor, among others. Texas Instruments and STMicroelectronics are large multinational corporations that specialize in the design and manufacture of semiconductor devices and various electronic components. Texas Instruments, based in the United States, is known for its wide range of products including analog chips, digital signal processors, and microcontrollers. STMicroelectronics, headquartered in Switzerland, also offers a diverse portfolio of semiconductor products and is renowned for its innovation in integrated circuits and discrete devices. These companies are key players in the electronics industry, serving various markets such as consumer electronics, automotive, industrial, and communications.

Application

The LM317LM is a versatile voltage regulator used in applications requiring adjustable voltage sources. Its primary application areas include power supplies for electronic circuits, battery chargers, and LED drivers. It is also used in test equipment, bench power supplies, and DIY electronics projects to provide stable voltage outputs. Due to its adjustable nature, it is ideal for situations where precise voltage regulation is needed, such as in sensor power supply circuits and audio equipment.

Equivalent

The LM317LM is a voltage regulator with adjustable output. Equivalent products include:
1. L78L33 - Offers similar functionality with fixed output variants.
2. LM317T - Another variant with higher current capability.
3. L78Lxx series - Provides fixed voltage options.
4. TL317 - A pin-compatible adjustable voltage regulator.
5. UA78M33 - Fixed voltage alternative with moderate current output.
These alternatives may vary in specifications like output current and voltage range.

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