LM317DCYR

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LM317DCYR

IC REG LIN POS ADJ 1.5A SOT223-4

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Specifications

Package Tape & Reel (TR),Cut Tape (CT),Bulk
ProductStatus Active
OutputConfiguration Positive
OutputType Adjustable
NumberofRegulators 1
Voltage-Input(Max) 40V
Voltage-Output(Min/Fixed) 1.25V
Voltage-Output(Max) 37V
Current-Output 1.5A
PSRR 64dB ~ 57dB (120Hz)
ProtectionFeatures Over Current, Over Temperature, Short Circuit
OperatingTemperature 0°C ~ 125°C
MountingType Surface Mount
Package/Case TO-261-4, TO-261AA

Overview

Description

The LM317DCYR is a versatile, adjustable three-terminal voltage regulator designed for a variety of applications requiring a stable output voltage. It is part of the LM317 series, known for its ability to deliver output voltages ranging from 1.25V to 37V with an output current of up to 1.5A, depending on the input voltage and the difference between input and output voltages.
This device is packaged in a surface-mount SOT-223 configuration, making it suitable for compact and densely packed circuit boards. The LM317DCYR features internal current limiting, thermal overload protection, and safe area compensation, ensuring reliable operation even under challenging conditions.
To set the desired output voltage, only two external resistors are required. This flexibility, combined with its robust performance, makes it ideal for use in power supplies, battery chargers, and adjustable power applications. Its ease of use and reliability have made it a popular choice among engineers and hobbyists alike for regulating voltage in electronic circuits.

Features

The LM317DCYR is a versatile voltage regulator from Texas Instruments, designed for applications requiring a reliable adjustable voltage output. Here are some key features:
1. Adjustable Output Voltage: It provides an output voltage range from 1.25V to 37V, adjustable with two external resistors.
2. Output Current: Capable of delivering over 1.5A of load current with adequate heat sinking.
3. Line and Load Regulation: Offers excellent line regulation of 0.01% per volt and load regulation of 0.1%.
4. Thermal Overload Protection: Built-in protection to prevent damage due to overheating.
5. Current Limit Protection: Features internal current limiting to protect against short circuits.
6. Safe Operating Area (SOA) Protection: Designed to ensure reliability by maintaining operation within safe limits.
7. Package Type: Comes in a SOT-223 package, which is compact and suitable for space-constrained designs.
8. Temperature Range: Operates over a wide temperature range from -40°C to 125°C, making it suitable for various environments.
These features make the LM317DCYR an ideal choice for power supply applications requiring precision and durability.

Package

The LM317DCYR is a voltage regulator with an adjustable output. It comes in a SOT-223 package type, which is a small outline transistor package used for surface-mount technology (SMT). This package type is compact, allowing for efficient thermal management and is suitable for applications with limited space.

Pinout

The LM317DCYR is a 3-pin adjustable voltage regulator. Its main function is to provide a stable output voltage that can be adjusted over a specified range, typically from 1.25V to 37V, with an input voltage up to 40V. The pin configuration is as follows:
1. Input (Pin 3): This pin receives the input voltage which should be at least 3V higher than the desired output voltage for proper regulation.
2. Output (Pin 2): This pin provides the regulated output voltage. The voltage can be adjusted by using two external resistors.
3. Adjust (Pin 1): This pin is used to set the output voltage. By connecting a resistor divider network between the output and adjust pins, the desired output voltage can be achieved.
The LM317DCYR is commonly used in power supplies for various electronic devices due to its ability to provide a versatile and reliable voltage regulation solution.

Manufacturer

The LM317DCYR is manufactured by Texas Instruments. Texas Instruments is a global semiconductor company that designs and produces a wide range of electronic components, including integrated circuits and processors. TI is well-known for its innovation and development in the electronics industry, providing solutions for various applications such as industrial, automotive, personal electronics, and communications equipment. Founded in 1930 and headquartered in Dallas, Texas, the company is a leader in the semiconductor sector, focusing on analog and embedded processing products.

Application

The LM317DCYR is a versatile voltage regulator used in various applications, including power supply design, battery chargers, adjustable power supplies, and constant current regulators. It is often employed in consumer electronics, communication devices, and industrial equipment due to its ability to provide a stable output voltage with a wide range of input voltages. Additionally, the LM317DCYR is useful in LED drivers and microcontroller power supplies, offering thermal overload protection and short-circuit safety features.

Equivalent

The LM317DCYR is a voltage regulator with adjustable output commonly used in power supply applications. Equivalent products include:
1. L78xx Series (for fixed output)
2. LM1117
3. LM317T
4. LT1086
5. UA78xx Series (for fixed output)
6. NTE956
7. MC317T
These alternatives might have slight variations in specifications, so it’s essential to check the datasheets to ensure compatibility with your specific application requirements.

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.

Payments

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