Part Details for LM317AT by National Semiconductor Corporation
Results Overview of LM317AT by National Semiconductor Corporation
- Distributor Offerings: (7 listings)
- Number of FFF Equivalents: (0 replacements)
- Tariff Estimator: (Available) NEW
- Number of Functional Equivalents: (3 options)
- CAD Models: (Request Part)
- Part Data Attributes: (Available)
- Reference Designs: (Not Available)
Tip: Data for a part may vary between manufacturers. You can filter for manufacturers on the top of the page next to the part image and part number.
LM317AT Information
LM317AT by National Semiconductor Corporation is a Linear Regulator IC.
Linear Regulator ICs are under the broader part category of Power Circuits.
A power circuit delivers electricity in order to operate a load for an electronic device. Power circuits include transformers, generators and switches. Read more about Power Circuits on our Power Circuits part category page.
Available Datasheets
| Part # | Manufacturer | Description | Datasheet |
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| LM317AT | Texas Instruments | 1% Accurate, 1.5A Adjustable Linear Regulator with Short Circuit Protection 3-TO-220 -40 to 125 | |
| LM317AT/NOPB | Texas Instruments | 1% Accurate, 1.5A Adjustable Linear Regulator with Short Circuit Protection 3-TO-220 -40 to 125 |
Price & Stock for LM317AT
| Part # | Distributor | Description | Stock | Price | Buy | |
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Bristol Electronics | 491 |
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Bristol Electronics | 248 |
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Bristol Electronics | 76 |
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Bristol Electronics | 63 |
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ComSIT USA | 1 PERCENT ACCURATE 3-TERMINAL ADJUSTABLE REGULATOR Adjustable Positive Standard Regulator, 1.2V Min, 37V Max, BIPolar, PSFM3 ECCN: EAR99 RoHS: Not Compliant |
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Chip 1 Exchange | INSTOCK | 518 |
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Component Electronics, Inc | TO-220 45PCS/TUBE | 583 |
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$2.0000 / $3.0800 | Buy Now |
US Tariff Estimator: LM317AT by National Semiconductor Corporation
Calculations from this tool are estimations only for imports into the United States. Please refer to the distributor or manufacturer and reference official US government sources and authorities to verify any final purchase costs.
Part Details for LM317AT
LM317AT Part Data Attributes
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LM317AT
National Semiconductor Corporation
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Datasheet
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LM317AT
National Semiconductor Corporation
IC VREG 1.2 V-37 V ADJUSTABLE POSITIVE REGULATOR, PSFM3, PLASTIC, TO-220, 3 PIN, Adjustable Positive Single Output Standard Regulator
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| Rohs Code | No | |
| Part Life Cycle Code | Transferred | |
| Package Description | Plastic, To-220, 3 Pin | |
| Reach Compliance Code | Not Compliant | |
| ECCN Code | EAR99 | |
| HTS Code | 8542.39.00.01 | |
| Adjustability | Adjustable | |
| Dropout Voltage1-Nom | 3 V | |
| Input-Output Voltage Differential-Max | 40 V | |
| Input-Output Voltage Differential-Min | 3 V | |
| JESD-30 Code | R-PSFM-T3 | |
| JESD-609 Code | e0 | |
| Line Regulation-Max (%/V) | 0.02 | |
| Load Regulation-Max(%) | 1% | |
| Moisture Sensitivity Level | 1 | |
| Number of Functions | 1 | |
| Number of Outputs | 1 | |
| Number of Terminals | 3 | |
| Operating Temperature TJ-Max | 125 °C | |
| Operating Temperature TJ-Min | -40 °C | |
| Output Current1-Max | 1.5 A | |
| Output Voltage1-Max | 37 V | |
| Output Voltage1-Min | 1.2 V | |
| Package Body Material | Plastic/Epoxy | |
| Package Code | TO-220 | |
| Package Equivalence Code | SIP3,.1TB | |
| Package Shape | Rectangular | |
| Package Style | Flange Mount | |
| Packing Method | Rail | |
| Peak Reflow Temperature (Cel) | 260 | |
| Qualification Status | Not Qualified | |
| Regulator Type | Adjustable Positive Single Output Standard Regulator | |
| Surface Mount | No | |
| Technology | Bipolar | |
| Terminal Finish | Tin/Lead (Sn/Pb) | |
| Terminal Form | Through-Hole | |
| Terminal Pitch | 2.54 Mm | |
| Terminal Position | Single | |
| Time@Peak Reflow Temperature-Max (s) | 40 |
Alternate Parts for LM317AT
This table gives cross-reference parts and alternative options found for LM317AT. The Form Fit Function (FFF) tab will give you the options that are more likely to serve as direct pin-to-pin alternates or drop-in parts. The Functional Equivalents tab will give you options that are likely to match the same function of LM317AT, but it may not fit your design. Always verify details of parts you are evaluating, as these parts are offered as suggestions for what you are looking for and are not guaranteed.
| Part Number | Manufacturer | Composite Price | Description | Compare |
|---|---|---|---|---|
| LM317AT/NOPB | Texas Instruments | $1.6339 | 1.5-A, 40-V, adjustable linear voltage regulator with high-accuracy 3-TO-220 -40 to 125 | LM317AT vs LM317AT/NOPB |
| LM317AT | Texas Instruments | Check for Price | 1.5-A, 40-V, adjustable linear voltage regulator with high-accuracy 3-TO-220 -40 to 125 | LM317AT vs LM317AT |
| LM317AT | Analog Devices Inc | Check for Price | Adjustable Positive Standard Regulator, PBCY3 | LM317AT vs LM317AT |
LM317AT Frequently Asked Questions (FAQ)
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The minimum input voltage required for the LM317AT to operate is 3V above the output voltage. For example, if the output voltage is 5V, the minimum input voltage would be 8V.
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To ensure stability and prevent oscillations, a minimum output capacitance of 1uF is recommended. Additionally, the input capacitor should be at least 10uF to prevent oscillations.
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The maximum current that the LM317AT can supply is 1.5A. However, it's recommended to derate the current to 1A or less to ensure reliable operation.
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No, the LM317AT is designed to regulate positive voltages only. If you need a negative voltage regulator, you should use a different IC, such as the LM337.
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The output voltage of the LM317AT can be adjusted by using a resistive divider network between the output and the adjust pin. The output voltage is determined by the ratio of the resistors and the reference voltage (1.25V).