LM317D2T

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LM317D2T

IC REG LINEAR POS ADJ 1.5A D2PAK

  • Manufacturer
  • Mfr. Part #LM317D2T
  • Package TO-263-3
  • Datasheet
  • In Stock7537

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Specifications

Package Tube
ProductStatus Obsolete
OutputConfiguration Positive
OutputType Adjustable
NumberofRegulators 1
Voltage-Input(Max) 40V
Voltage-Output(Min/Fixed) 1.2V
Voltage-Output(Max) 37V
Current-Output 1.5A
PSRR 80dB ~ 65dB (120Hz)
ProtectionFeatures Over Current, Over Temperature, Short Circuit
OperatingTemperature 0°C ~ 125°C
MountingType Surface Mount
Package/Case TO-263-3, D²Pak (2 Leads + Tab), TO-263AB

Overview

Description

The LM317D2T is a versatile, adjustable voltage regulator designed to provide a stable output voltage ranging from 1.25V to 37V, with a maximum output current of 1.5A. It is part of the LM317 series and is commonly used in various electronic applications due to its simplicity and reliability.
Key features of the LM317D2T include thermal overload protection, short-circuit protection, and a safe operating area compensation, making it robust and durable for different environments. The device requires only two external resistors to set the output voltage, allowing for easy customization.
Housed in a D2PAK (also known as TO-263) package, the LM317D2T is suitable for surface-mount applications. Its compact form factor and efficient thermal design make it ideal for use in PCBs with limited space.
Typical applications include power supplies, battery chargers, and adjustable power sources for laboratory and hobbyist projects. Its ability to regulate voltage effectively makes it a popular choice for engineers and DIY enthusiasts alike.

Features

The LM317D2T is a versatile adjustable voltage regulator designed for a wide range of applications. Key features include:
1. Output Voltage Range: It provides an adjustable output voltage between 1.25V and 37V with the use of two external resistors.
2. Output Current: The device can deliver a maximum current of 1.5A, making it suitable for various load requirements.
3. Line and Load Regulation: It offers excellent line (0.01%/V) and load regulation (0.1%) characteristics, ensuring stable output even with fluctuations in input voltage and load current.
4. Thermal Protection: The regulator includes internal thermal overload protection to prevent damage from overheating.
5. Short-Circuit Protection: It is equipped with current limiting features for protection against short-circuit conditions.
6. Package: The LM317D2T is available in a TO-263 package, which is suitable for surface-mount applications and provides efficient thermal performance.
7. Ease of Use: Minimal external components are required, simplifying circuit design.
These features make the LM317D2T an ideal choice for power supply applications requiring precise voltage regulation and protection features.

Package

The LM317D2T is a voltage regulator available in a TO-263 package. The TO-263, also known as D2PAK, is a surface-mount package that provides efficient thermal management and is suitable for applications requiring compact design and reliability.

Pinout

The LM317D2T is a variant of the LM317 voltage regulator, which is widely used for adjustable voltage regulation applications. It typically comes in a TO-263 package and features three pins:
1. Input (Vin): This pin is where the unregulated input voltage is applied. The input voltage must be higher than the desired output voltage and within the device's specified range for proper regulation.
2. Output (Vout): This pin provides the regulated output voltage. The output voltage is adjustable over a range of 1.25V to 37V, depending on the input voltage and the configuration of external resistors.
3. Adjust (Adj): This pin is used to adjust the output voltage. By connecting a pair of resistors between the output and this pin, users can set the desired output voltage according to the formula Vout = 1.25V * (1 + R2/R1) + Iadj * R2, where Iadj is typically very small.
The LM317D2T can supply up to 1.5A of output current with adequate heat sinking and is known for its versatility, ease of use, and stable performance in various electronic applications.

Manufacturer

The LM317D2T is manufactured by STMicroelectronics. STMicroelectronics is a multinational corporation that specializes in the design, development, manufacture, and marketing of a broad range of semiconductor products. The company serves several markets, including industrial, automotive, personal electronics, and communications. As one of the leading semiconductor companies globally, STMicroelectronics provides solutions for both analog and digital components, integrated circuits, and system-on-chip technologies.

Application

The LM317D2T is a versatile voltage regulator used in various applications, including power supply regulation for electronic devices, adjustable power supplies, battery chargers, and current regulation. It is commonly used in consumer electronics, industrial equipment, and communication devices for its ability to provide a stable output voltage with adjustable settings, typically ranging from 1.25V to 37V. Its robust performance and simplicity make it an ideal choice for projects requiring reliable voltage regulation and thermal stability.

Equivalent

The LM317D2T is a voltage regulator, and its equivalents include:
- LM317T
- L78S05CV
- UA78M05CKTTR
- L7805CP
- NTE956
- LT1086
These alternatives are based on similar functionality and specifications but may vary in package type and electrical characteristics. Always check datasheets for compatibility.

Shipping

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Shipping Fee Reference (DHL/FedEx):

DHL: Shipping cost ranges from $25-$45 (0.5kg), with an estimated delivery time of 2-5 business days.

FedEx: Shipping cost ranges from $25-$40 (0.5kg), with an estimated delivery time of 3-7 business days.

UPS: Shipping cost ranges from $25-$45 (0.5kg), with an estimated delivery time of 3-7 business days.

TNT: Shipping cost ranges from $25-$65 (0.5kg), with an estimated delivery time of 3-7 business days.

EMS: Shipping cost ranges from $30-$50 (0.5kg), with an estimated delivery time of 7-15 business days.

Registered Air Mail: Shipping cost is $2-$4 (0.1kg), with an estimated delivery time of 5-20 business days.

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