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LM317LCDR
IC REG LIN POS ADJ 100MA 8SOIC
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規格
| Package | Tape & Reel (TR),Cut Tape (CT) |
| ProductStatus | Active |
| OutputConfiguration | Positive |
| OutputType | Adjustable |
| NumberofRegulators | 1 |
| Voltage-Input(Max) | 38V |
| Voltage-Output(Min/Fixed) | 1.2V |
| Voltage-Output(Max) | 32V |
| Current-Output | 100mA |
| PSRR | 80dB ~ 65dB (120Hz) |
| ProtectionFeatures | Over Current, Over Temperature, Short Circuit |
| OperatingTemperature | 0°C ~ 125°C |
| MountingType | Surface Mount |
| Package/Case | 8-SOIC (0.154, 3.90mm Width) |
概述
Description
The LM317LCDR is a popular adjustable voltage regulator integrated circuit (IC) used in electronic circuits to provide a stable output voltage. It is part of the LM317 series and is capable of outputting a range of voltages, typically from 1.25V to 37V, with a current output of up to 100 mA. This makes it versatile for various applications requiring precise voltage control.
The device operates by using an external resistor network to set the desired output voltage. The LM317LCDR features thermal overload protection, ensuring safety from overheating, and current limiting to prevent excessive current draw, enhancing reliability.
Packaged in a small SOT-223 surface-mount format, the LM317LCDR is suitable for compact designs and is used in power management, battery chargers, and adjustable power supplies. Its ease of use, low cost, and reliability make it a popular choice for hobbyists and professionals alike in designing circuits requiring adjustable voltage regulation.
The device operates by using an external resistor network to set the desired output voltage. The LM317LCDR features thermal overload protection, ensuring safety from overheating, and current limiting to prevent excessive current draw, enhancing reliability.
Packaged in a small SOT-223 surface-mount format, the LM317LCDR is suitable for compact designs and is used in power management, battery chargers, and adjustable power supplies. Its ease of use, low cost, and reliability make it a popular choice for hobbyists and professionals alike in designing circuits requiring adjustable voltage regulation.
Features
The LM317LCDR is a versatile adjustable three-terminal voltage regulator. Key features include:
1. Output Voltage Range: It can be adjusted from 1.25V to 37V, making it suitable for a wide range of applications.
2. Output Current: It can deliver over 100mA of output current, providing sufficient power for many small to medium-sized electronic projects.
3. Easy to Use: The device requires only two external resistors to set the output voltage, simplifying circuit design.
4. Thermal Regulation: The LM317LCDR includes built-in thermal overload protection, safeguarding the device from overheating.
5. Short-Circuit Protection: It features short-circuit protection, which limits the current to prevent damage to the regulator in case of a fault.
6. Line Regulation: It offers excellent line regulation, with typical values of 0.01%/V, ensuring stable output despite variations in input voltage.
7. Load Regulation: Provides good load regulation, typically around 0.1%, ensuring a steady output voltage under varying load conditions.
These features make the LM317LCDR a reliable choice for applications requiring adjustable voltage regulation with robust protection mechanisms.
1. Output Voltage Range: It can be adjusted from 1.25V to 37V, making it suitable for a wide range of applications.
2. Output Current: It can deliver over 100mA of output current, providing sufficient power for many small to medium-sized electronic projects.
3. Easy to Use: The device requires only two external resistors to set the output voltage, simplifying circuit design.
4. Thermal Regulation: The LM317LCDR includes built-in thermal overload protection, safeguarding the device from overheating.
5. Short-Circuit Protection: It features short-circuit protection, which limits the current to prevent damage to the regulator in case of a fault.
6. Line Regulation: It offers excellent line regulation, with typical values of 0.01%/V, ensuring stable output despite variations in input voltage.
7. Load Regulation: Provides good load regulation, typically around 0.1%, ensuring a steady output voltage under varying load conditions.
These features make the LM317LCDR a reliable choice for applications requiring adjustable voltage regulation with robust protection mechanisms.
Package
The LM317LCDR is a three-terminal adjustable voltage regulator IC, typically provided in a surface-mount SOT-223 package. This package type is compact and suitable for applications requiring moderate power dissipation.
Pinout
The LM317LCDR is a three-terminal adjustable voltage regulator. It is designed to provide a stable output voltage that can be set anywhere from 1.25V to 37V with a maximum output current of 100 mA. The three pins are:
1. Input (IN): This pin receives the unregulated input voltage that needs to be regulated.
2. Output (OUT): This pin outputs the regulated voltage.
3. Adjust (ADJ): This pin is used to adjust the output voltage by connecting it to a resistor network between the output and ground.
The LM317LCDR is typically used in applications that require a variable voltage supply. It is commonly found in portable devices, battery chargers, and power supplies. The "CDR" in the part number often refers to the packaging or specific variant of the device, commonly referring to a surface-mount package like the DPAK (TO-252).
1. Input (IN): This pin receives the unregulated input voltage that needs to be regulated.
2. Output (OUT): This pin outputs the regulated voltage.
3. Adjust (ADJ): This pin is used to adjust the output voltage by connecting it to a resistor network between the output and ground.
The LM317LCDR is typically used in applications that require a variable voltage supply. It is commonly found in portable devices, battery chargers, and power supplies. The "CDR" in the part number often refers to the packaging or specific variant of the device, commonly referring to a surface-mount package like the DPAK (TO-252).
Manufacturer
The LM317LCDR is manufactured by Texas Instruments, an American technology company. Texas Instruments is a global leader in the design and manufacturing of semiconductors and various integrated circuits, which are widely used in electronics. The company provides solutions for a broad range of industries, including automotive, industrial, consumer electronics, and communications equipment. Texas Instruments is well-known for its innovation in analog and embedded processing technologies.
Application
The LM317LCDR is a versatile voltage regulator commonly used in applications requiring adjustable voltage regulation. Its key application areas include power supply designs, battery chargers, LED drivers, and consumer electronics. It is also used in post-regulation of switching supplies and adjustable power solutions for test equipment. The device's capability to provide a stable output over a wide range of input voltages makes it suitable for various electronic projects and circuit designs requiring reliable voltage stability.
Equivalent
The LM317LCDR is a linear voltage regulator. Equivalent products include the LM317 series from various manufacturers such as:
1. LM317T
2. L78xx series (for fixed output)
3. TL783 (high-voltage version)
4. UA78M33 (for specific output needs)
5. NTE956 (NTE Electronics equivalent)
These equivalents may vary slightly in package type, current rating, and thermal characteristics, so always check the datasheets to ensure compatibility with your specific requirements.
1. LM317T
2. L78xx series (for fixed output)
3. TL783 (high-voltage version)
4. UA78M33 (for specific output needs)
5. NTE956 (NTE Electronics equivalent)
These equivalents may vary slightly in package type, current rating, and thermal characteristics, so always check the datasheets to ensure compatibility with your specific requirements.
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