LM317L

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LM317L

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IC REG LINEAR POS ADJ 100MA TO92

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Thông số kỹ thuật

thuộc tính Giá trị
Part Status Active
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) 100 µA
PSRR 75dB ~ 60dB (120Hz)
Protection Features Over Temperature, Short Circuit
Operating Temperature -40°C ~ 125°C (TJ)
Mounting Type Through Hole
Package / Case TO-226-3, TO-92-3 (TO-226AA)
Supplier Device Package TO-92

Tổng quan

Description

The LM317L is a versatile, adjustable linear voltage regulator designed to provide a stable output voltage ranging from 1.2V to 37V, with a maximum output current of 100 mA. It is a smaller variant of the LM317 series, optimized for low-power applications. The device requires only two external resistors to set the desired output voltage, making it simple to integrate into circuits.
The LM317L is known for its high regulation and low ripple, ensuring a smooth and consistent output. It also incorporates features such as overcurrent and thermal overload protection, enhancing its reliability and durability. The regulator is capable of maintaining a constant output voltage despite variations in the input voltage and load current.
Common applications of the LM317L include battery chargers, adjustable power supplies, and power management in portable devices. Its small form factor makes it ideal for use in compact electronic designs. Overall, the LM317L is a cost-effective solution for achieving precise voltage regulation in a wide range of electronic projects.

Equivalent

Equivalent products to the LM317L voltage regulator include:
1. L78Lxx series (e.g., L78L05, L78L12)
2. TL431 or TLV431 (with external resistors for adjustable voltage)
3. NTE956
4. KA317L
5. UA78M33 (for fixed voltage applications)
These components offer similar adjustable voltage regulation capabilities or can be configured for similar applications. Always check datasheets for exact specifications and pin compatibility.

Features

The LM317L is a versatile, low-power voltage regulator designed for a wide range of applications. Key features include:
1. Adjustable Output Voltage: Capable of providing an output voltage range from 1.25V to 37V, enabling flexibility for various projects.
2. Output Current: Can supply an output current up to 100 mA, suitable for low-power applications.
3. High Regulation: Offers excellent line and load regulation to maintain consistent output voltage despite input fluctuations or changes in load.
4. Thermal Overload Protection: Includes built-in protection mechanisms to prevent overheating, enhancing reliability and longevity.
5. Short-Circuit Protection: Features current limiting to protect against damage caused by short circuits.
6. Low Dropout Voltage: Operates with a small difference between input and output voltages, increasing efficiency.
7. Easy to Use: Requires only two external resistors to set the output voltage, simplifying circuit design.
8. Package Options: Available in small form-factor packages, such as TO-92, making it suitable for space-constrained applications.
These features make the LM317L a popular choice for tasks requiring dependable, adjustable voltage regulation in compact, cost-effective solutions.

Pinout

The LM317L is a 3-pin adjustable voltage regulator. It is designed to provide an output voltage that can be adjusted between 1.25V to 37V, with a maximum output current of 100 mA. The pin configuration is as follows:
1. Input (Pin 3): This pin receives the unregulated input voltage which should be at least 3V higher than the desired output voltage.
2. Output (Pin 2): The regulated output voltage is available at this pin. The output voltage is set using external resistors.
3. Adjust (Pin 1): This pin is used to set the output voltage. By connecting a resistor between this pin and the output, and another resistor from the adjust pin to the ground, you can set the desired output voltage using the formula: \( V_{out} = V_{ref} \times (1 + \frac{R_2}{R_1}) + I_{adj} \times R_2 \).
The LM317L is widely used for its simplicity and reliability in applications where a stable output voltage is required.

Manufacturer

The LM317L is a voltage regulator typically manufactured by several semiconductor companies, including Texas Instruments, STMicroelectronics, ON Semiconductor, and Fairchild Semiconductor, among others. Each of these companies is involved in the design and manufacturing of semiconductor devices and integrated circuits, which are essential components in a wide range of electronic products and systems.
1. Texas Instruments (TI): An American technology company that designs and manufactures semiconductors and various integrated circuits. TI is known for its wide range of analog and embedded processing products.
2. STMicroelectronics: A European multinational company that produces a broad portfolio of semiconductor products, including analog devices, microcontrollers, sensors, and power management solutions.
3. ON Semiconductor: An American semiconductor supplier providing a comprehensive portfolio of energy-efficient power and signal management, logic, discrete, and custom devices.
4. Fairchild Semiconductor: Originally a prominent American semiconductor company, Fairchild was acquired by ON Semiconductor in 2016 and is known for its power and signal path products.
These companies are crucial players in the electronics industry, supplying components used in consumer electronics, automotive, industrial, and communication applications worldwide.

Application

The LM317L is a versatile, adjustable voltage regulator used in various applications. Key areas include:
1. Power Supply Design: It provides adjustable, stable output voltage for custom power supplies.
2. Battery Chargers: Ensures regulated voltage for efficient battery charging.
3. Voltage Regulation: Useful in converting voltage levels for different electronic devices.
4. Current Regulation: Acts as a constant current source in LED drivers and other circuits.
5. Embedded Systems: Supplies stable voltage to microcontrollers and sensors.
6. Analog Circuitry: Provides reliable power for audio amplifiers and operational amplifiers.
7. Test Equipment: Used for creating adjustable test voltages in laboratories.
Its ease of use and wide input voltage range make it suitable for diverse electronics applications.

Package

The LM317L is commonly available in TO-92 and SOT-89 package types. These package types are suitable for low power applications, with TO-92 being the traditional through-hole package and SOT-89 being a surface-mount option.

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