STMICROELECTRONICS LM317TIC, REGULATOR ADJ 1.2/37V, TUBE50
LM317T is a 1.2 V to 37 V adjustable voltage regulator. This article mainly introduces pinout, specifications, features, and other detailed information about STMicroelectronics LM317T.
LM317T Voltage Regulator: Pinout, CAD Model and Datasheet
STMICROELECTRONICS LM317TIC, REGULATOR ADJ +1.2/37V, TUBE50 LM317T is a 1.2 V to 37 V adjustable voltage regulator.
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Mar 1, 2021
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LM317T
2000In Stock
Min.: 1 Mult.: 1
| Quantity | Unit Price | Ext. Price |
|---|---|---|
| 1+ | $5.13072 | $5.13 |
| 10+ | $4.8403 | $48.4 |
| 100+ | $4.56633 | $456.63 |
| 500+ | $4.30785 | $2153.93 |
| 1000+ | $4.06401 | $4064.01 |
Unit Price:$5.13072
Subtotal: $5.13
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LM317T Description
The LM317 device introduced in this blog is LM317T, which is the monolithic integrated circuit in the TO-220 package intended for use as positive adjustable voltage regulators. They are designed to supply more than 1.5 A of load current with an output voltage adjustable over a 1.2 to 37 V range. The nominal output voltage is selected by means of a resistive divider, making the device exceptionally easy to use and eliminating the stocking of many fixed regulators.
LM317T Pinout
|
Pin Number |
Pin Name |
Description |
|
1 |
Adjust |
This pin adjusts the output voltage |
|
2 |
Output Voltage (Vout) |
The regulated output voltage set by the adjusted pin can be obtained from this pin |
|
3 |
Input Voltage (Vin) |
The input voltage which has to be regulated is given to this pin |
LM317T CAD Model
PCB Symbol - STMicroelectronics LM317T
PCB Footprint - STMicroelectronics LM317T
LM317T Features
• Output voltage range: 1.2 to 37 V
• Output current in excess of 1.5 A
• 0.1% line and load regulation
• Floating operation for high voltages
• Complete series of protections: current limiting, thermal shutdown, and SOA control
Specifications
STMicroelectronics LM317T technical specifications, attributes, parameters and parts with similar specifications to STMicroelectronics LM317T.
LM317T Tech Specifications
LM317T Tech Specifications
Texas Instruments LM317T technical specifications, attributes, parameters and parts with similar specifications to Texas Instruments LM317T.
| Product Attribute | Attribute Value | |
|---|---|---|
| Lifecycle Status | NRND (Last Updated: 3 days ago) | |
| Mount | Through Hole | |
| Mounting Type | Through Hole | |
| Package / Case | TO-220-3 | |
| Number of Pins | 3Pins | |
| Weight | 2.299997g | |
| Operating Temperature | 0°C~125°C | |
| Packaging | Tube | |
| JESD-609 Code | e0 | |
| Part Status | Not For New Designs | |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) | |
| Number of Terminations | 3Terminations | |
| Termination | Through Hole | |
| ECCN Code | EAR99 | |
| Terminal Finish | Tin/Lead (Sn/Pb) |
| Product Attribute | Attribute Value | |
|---|---|---|
| Terminal Position | SINGLE | |
| Number of Functions | 1Function | |
| Current Rating | 1.5A | |
| Base Part Number | LM317 | |
| Pin Count | 3 | |
| Output Voltage | 37V | |
| Output Type | Adjustable | |
| Max Output Current | 1.5A | |
| Max Supply Voltage | 40V | |
| Min Supply Voltage | 3V | |
| Output Configuration | Positive | |
| Max Output Voltage | 37V | |
| Voltage - Output (Min/Fixed) | 1.25V | |
| Number of Regulators | 1Regulator | |
| Min Input Voltage | 4.2V |
| Product Attribute | Attribute Value | |
|---|---|---|
| Protection Features | Over Current, Over Temperature, Short Circuit | |
| PSRR | 64dB (120Hz) | |
| Dropout Voltage | 2V | |
| Min Output Voltage | 1.2V | |
| Power Supply Rejection Ratio (PSRR) | 80dB | |
| Height | 4.7mm | |
| Length | 14.986mm | |
| Width | 10.16mm | |
| Thickness | 4.572mm | |
| REACH SVHC | No SVHC | |
| Radiation Hardening | No | |
| RoHS Status | Non-RoHS Compliant | |
| Lead Free | Lead Free |
LM317T Diagram
Schematic diagram
LM317T Alternatives
|
Part Number |
Description |
Manufacturer |
|
LM317KC |
3/4 Pin 1.5A Adjustable Positive Voltage Regulator 3-TO-220 0 to 125 |
Texas Instruments |
|
LM317T |
1.2 V to 37 V adjustable voltage regulators |
STMicroelectronics |
|
LM317T#PBF |
IC VREG 1.2 V-37 V ADJUSTABLE POSITIVE REGULATOR, PSFM3, PLASTIC, TO-220, 3 PIN, Adjustable Positive Single Output Standard Regulator |
Linear Technology |
|
LM317T/NOPB |
IC VREG 1.2 V-37 V ADJUSTABLE POSITIVE REGULATOR, PSFM3, ROHS COMPLIANT, PLASTIC, TO-220, 3 PIN, Adjustable Positive Single Output Standard Regulator |
National Semiconductor Corporation |
|
LM317T2 |
1.2 V-37V ADJUSTABLE POSITIVE REGULATOR, PSFM3, PLASTIC, TO-220, 3 PIN |
ON Semiconductor |
Where to use LM317?
When it comes to variable voltage regulation requirements LM317 would most likely be the first choice. Apart from using it as a variable voltage regulator, it can also be used as a fixed voltage regulator, current limiter, Battery charger, AC voltage regulator, and even as an adjustable current regulator. One notable drawback of this IC is that it has a voltage drop of about 2.5 across it during regulation, so if you looking to avoid that problem look into the other equivalent IC’s given above.
So, if you are looking for a variable voltage regulator to deliver current up to 1.5A then this regulator IC might be the right choice for your application.
LM317T Applications
-
Used for Positive voltage regulations
-
Variable power supply
-
Current limiting circuits
-
Reverse polarity circuits
-
Commonly used in Desktop PC, DVD and other consumer products
-
Used in motor control circuits
LM317T Package
TO-220 (single gauge) package information
TO-220 (single gauge) mechanical data
LM317T Manufacturer
STMicroelectronics is a global independent semiconductor company and is a leader in developing and delivering semiconductor solutions across the spectrum of microelectronics applications. An unrivaled combination of silicon and system expertise, manufacturing strength, Intellectual Property (IP) portfolio, and strategic partners positions the Company at the forefront of System-on-Chip (SoC) technology, and its products play a key role in enabling today's convergence trends.
Datasheet PDF
Download datasheets and manufacturer documentation for STMicroelectronics LM317T.
LM317T Documents
LM317T Documents
Download datasheets and manufacturer documentation for LM317T
Datasheets
LM317T-Texas-Instruments-datasheet-100103620.pdf
LM317T-Texas-Instruments-datasheet-37129307.pdf
LM317T-Texas-Instruments-datasheet-17727434.pdf
LM317T-Texas-Instruments-datasheet-10845457.pdf
LM317T-Texas-Instruments-datasheet-516468.pdf
LM317T-National-Semiconductor-datasheet-35719.pdf
PCN Assembly/Origin
Mult Devices 12/Apr/2018
Frequently Asked Questions
1.What is the difference between LM337 and LM317?
1. The use of LM117 is very simple, only two external resistors are needed to set the output voltage. In addition, its linear regulation and load regulation are better than standard fixed regulators. LM117 has built-in multiple protection circuits such as overload protection and safe zone protection. 2. Generally, LM117 does not need an external capacitor, unless the connection between the input filter capacitor and the input of LM117 exceeds 15 cm. Using the output capacitor can change the transient response. The use of filter capacitors on the adjustment side can get a much higher ripple rejection ratio than standard regulators. 3. LM317 is one of the most widely used power integrated circuits. It not only has the simplest form of a fixed three-terminal voltage regulator circuit, but also has the characteristics of adjustable output voltage. 4.In addition, it also has the advantages of wide voltage regulation range, good voltage regulation performance, low noise, and high ripple rejection ratio. lm317 is an adjustable 3-terminal positive voltage regulator, which can provide more than 1.5A of current when the output voltage ranges from 1.2V to 37V. This regulator is very easy to use.
2.Where is LM317 generally used?
LM317 application: 1. As an integrated three-terminal voltage regulator block with variable output voltage, LM317 is a convenient and widely used integrated voltage regulator block. There are many models of the 317 series voltage stabilizing block. The 317 stabilizing block can be used to make a regulated power supply with variable output voltage. 2. For the stable operation of the circuit in the application, a diode is generally needed as a protection circuit to prevent the high voltage when the capacitor in the circuit discharges from burning out the 317. 3. LM317 is one of the most widely used power supply integrated circuits. It not only has the simplest form of a fixed three-terminal voltage regulator circuit, but also has the characteristics of adjustable output voltage. It also has a wide range of voltage regulation, good voltage regulation performance, and noise. Low, high ripple rejection ratio and other advantages. LM317 can provide more than 1.5A current in the output voltage range of 1.2V to 37V, which is very easy to use. 4. Three points must be met before using LM317, otherwise there will be a lot of problems: the power supply or transformer must have enough power; the input can only be greater than the regulated value of 3-5V, preferably about 5V, and the load current must be known.
3.Is LM317 a triode?
Although LM317 is a standard three-terminal transistor package, it is definitely not a triode. The full name of LM317 is adjustable three-terminal anode regulator, which can provide more than 1.5A current and output range from 1.2V to 37V. Only 2 external resistors are required to set the voltage output on the configuration. In addition, both line regulation and load regulation are better than standard fixed voltage regulators. Moreover, LM317 is integrated in a standard transistor package, which is easy to install and operate.
4.What is the difference between LM317 and LM317T?
LM317 omit the package symbol, LM317 package models are LM317K, LM317H, LM317T, LM317MP, etc., The package of LM317T is plastic (TO-220).
5.What is the difference between LM7815 series and LM317 series?
LM78XX is a fixed voltage regulator tube. For example, 7805 is a +5V regulator, 7815 is a +15V regulator, and LM317 is an adjustable voltage regulator. Different resistors can be used to achieve different voltage stabilization. In addition, the 79xx series are negative voltage regulator tubes.
FAQ
1.What is the difference between LM337 and LM317?
1. The use of LM117 is very simple, only two external resistors are needed to set the output voltage. In addition, its linear regulation and load regulation are better than standard fixed regulators. LM117 has built-in multiple protection circuits such as overload protection and safe zone protection. 2. Generally, LM117 does not need an external capacitor, unless the connection between the input filter capacitor and the input of LM117 exceeds 15 cm. Using the output capacitor can change the transient response. The use of filter capacitors on the adjustment side can get a much higher ripple rejection ratio than standard regulators. 3. LM317 is one of the most widely used power integrated circuits. It not only has the simplest form of a fixed three-terminal voltage regulator circuit, but also has the characteristics of adjustable output voltage. 4.In addition, it also has the advantages of wide voltage regulation range, good voltage regulation performance, low noise, and high ripple rejection ratio. lm317 is an adjustable 3-terminal positive voltage regulator, which can provide more than 1.5A of current when the output voltage ranges from 1.2V to 37V. This regulator is very easy to use.
2.Where is LM317 generally used?
LM317 application: 1. As an integrated three-terminal voltage regulator block with variable output voltage, LM317 is a convenient and widely used integrated voltage regulator block. There are many models of the 317 series voltage stabilizing block. The 317 stabilizing block can be used to make a regulated power supply with variable output voltage. 2. For the stable operation of the circuit in the application, a diode is generally needed as a protection circuit to prevent the high voltage when the capacitor in the circuit discharges from burning out the 317. 3. LM317 is one of the most widely used power supply integrated circuits. It not only has the simplest form of a fixed three-terminal voltage regulator circuit, but also has the characteristics of adjustable output voltage. It also has a wide range of voltage regulation, good voltage regulation performance, and noise. Low, high ripple rejection ratio and other advantages. LM317 can provide more than 1.5A current in the output voltage range of 1.2V to 37V, which is very easy to use. 4. Three points must be met before using LM317, otherwise there will be a lot of problems: the power supply or transformer must have enough power; the input can only be greater than the regulated value of 3-5V, preferably about 5V, and the load current must be known.
3.Is LM317 a triode?
Although LM317 is a standard three-terminal transistor package, it is definitely not a triode. The full name of LM317 is adjustable three-terminal anode regulator, which can provide more than 1.5A current and output range from 1.2V to 37V. Only 2 external resistors are required to set the voltage output on the configuration. In addition, both line regulation and load regulation are better than standard fixed voltage regulators. Moreover, LM317 is integrated in a standard transistor package, which is easy to install and operate.
4.What is the difference between LM317 and LM317T?
LM317 omit the package symbol, LM317 package models are LM317K, LM317H, LM317T, LM317MP, etc., The package of LM317T is plastic (TO-220).
5.What is the difference between LM7815 series and LM317 series?
LM78XX is a fixed voltage regulator tube. For example, 7805 is a +5V regulator, 7815 is a +15V regulator, and LM317 is an adjustable voltage regulator. Different resistors can be used to achieve different voltage stabilization. In addition, the 79xx series are negative voltage regulator tubes.
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