Part Details for LM317MDT by National Semiconductor Corporation
Results Overview of LM317MDT by National Semiconductor Corporation
- Distributor Offerings: (7 listings)
- Number of FFF Equivalents: (7 replacements)
- CAD Models: (Request Part)
- Number of Functional Equivalents: (10 options)
- 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.
LM317MDT Information
LM317MDT 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.
Price & Stock for LM317MDT
| Part # | Distributor | Description | Stock | Price | Buy | |
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Bristol Electronics | 4375 |
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RFQ | ||
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Bristol Electronics | 1001 |
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RFQ | ||
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Bristol Electronics | 900 |
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RFQ | ||
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Bristol Electronics | 35 |
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RFQ | ||
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Quest Components | IC,VOLT REGULATOR,ADJUSTABLE,+1.2 TO +37V,BIPOLAR,SIP,3PIN,PLASTIC | 437 |
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$0.8200 / $2.0500 | Buy Now |
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Quest Components | IC,VOLT REGULATOR,ADJUSTABLE,+1.2 TO +37V,BIPOLAR,SIP,3PIN,PLASTIC | 60 |
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$1.0000 / $2.0000 | Buy Now |
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Quest Components | IC,VOLT REGULATOR,ADJUSTABLE,+1.2 TO +37V,BIPOLAR,SIP,3PIN,PLASTIC | 5 |
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$0.4950 | Buy Now |
Part Details for LM317MDT
LM317MDT CAD Models
LM317MDT Part Data Attributes
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LM317MDT
National Semiconductor Corporation
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Datasheet
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LM317MDT
National Semiconductor Corporation
IC VREG 1.2 V-37 V ADJUSTABLE POSITIVE REGULATOR, PSSO2, TO-252, DPAK-3, Adjustable Positive Single Output Standard Regulator
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| Rohs Code | No | |
| Part Life Cycle Code | Transferred | |
| Ihs Manufacturer | NATIONAL SEMICONDUCTOR CORP | |
| Package Description | TO-252, DPAK-3 | |
| 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-PSSO-G2 | |
| JESD-609 Code | e0 | |
| Length | 6.58 mm | |
| Line Regulation-Max (%/V) | 0.07 | |
| Load Regulation-Max(%) | 1.5% | |
| Moisture Sensitivity Level | 1 | |
| Number of Functions | 1 | |
| Number of Outputs | 1 | |
| Number of Terminals | 2 | |
| Operating Temperature TJ-Max | 125 °C | |
| Operating Temperature TJ-Min | ||
| Output Current1-Max | 0.5 A | |
| Output Voltage1-Max | 37 V | |
| Output Voltage1-Min | 1.2 V | |
| Package Body Material | PLASTIC/EPOXY | |
| Package Code | TO-252 | |
| Package Equivalence Code | SMSIP3H,.38,90TB | |
| Package Shape | RECTANGULAR | |
| Package Style | SMALL OUTLINE | |
| Packing Method | RAIL | |
| Peak Reflow Temperature (Cel) | 235 | |
| Qualification Status | Not Qualified | |
| Regulator Type | ADJUSTABLE POSITIVE SINGLE OUTPUT STANDARD REGULATOR | |
| Seated Height-Max | 2.38 mm | |
| Surface Mount | YES | |
| Technology | BIPOLAR | |
| Terminal Finish | Tin/Lead (Sn/Pb) | |
| Terminal Form | GULL WING | |
| Terminal Pitch | 2.285 mm | |
| Terminal Position | SINGLE | |
| Time@Peak Reflow Temperature-Max (s) | 30 | |
| Width | 6.1 mm |
Alternate Parts for LM317MDT
This table gives cross-reference parts and alternative options found for LM317MDT. 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 LM317MDT, 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 |
|---|---|---|---|---|
| LM317MDTX | Texas Instruments | Check for Price | 1.2 V-37V ADJUSTABLE POSITIVE REGULATOR, PSSO2, TO-252, DPAK-3 | LM317MDT vs LM317MDTX |
| LM317MDTX/NOPB | National Semiconductor Corporation | Check for Price | IC VREG 1.2 V-37 V ADJUSTABLE POSITIVE REGULATOR, PSSO2, ROHS COMPLIANT, TO-252, DPAK-3, Adjustable Positive Single Output Standard Regulator | LM317MDT vs LM317MDTX/NOPB |
| LM317MDT | Texas Instruments | Check for Price | 1.2 V-37V ADJUSTABLE POSITIVE REGULATOR, PSSO2, TO-252, DPAK-3 | LM317MDT vs LM317MDT |
| LM317AMDT | National Semiconductor Corporation | Check for Price | IC VREG 1.2 V-37 V ADJUSTABLE POSITIVE REGULATOR, PSSO2, TO-252, DPAK-3, Adjustable Positive Single Output Standard Regulator | LM317MDT vs LM317AMDT |
| LM317AMDTX | National Semiconductor Corporation | Check for Price | IC VREG 1.2 V-37 V ADJUSTABLE POSITIVE REGULATOR, PSSO2, TO-252, DPAK-3, Adjustable Positive Single Output Standard Regulator | LM317MDT vs LM317AMDTX |
| LM317MDTX | National Semiconductor Corporation | Check for Price | IC VREG 1.2 V-37 V ADJUSTABLE POSITIVE REGULATOR, PSSO2, TO-252, DPAK-3, Adjustable Positive Single Output Standard Regulator | LM317MDT vs LM317MDTX |
| LM317MDT/NOPB | Texas Instruments | Check for Price | 1.5-A, 40-V, adjustable linear voltage regulator 3-TO-252 0 to 125 | LM317MDT vs LM317MDT/NOPB |
LM317MDT Frequently Asked Questions (FAQ)
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The minimum input voltage required for the LM317MDT to regulate the output voltage is typically 3V above the desired output voltage. For example, if you want to regulate the output voltage to 5V, the minimum input voltage should be at least 8V.
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To ensure the LM317MDT is stable and doesn't oscillate, make sure to use a minimum output capacitance of 1uF, and a minimum input capacitance of 0.1uF. Additionally, keep the output voltage sensing lines short and away from noise sources.
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The maximum output current that the LM317MDT can deliver is typically 1.5A. However, this can be limited by the input voltage, output voltage, and the package thermal resistance. Be sure to check the datasheet for specific limitations.
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No, the LM317MDT is designed to regulate positive output voltages only. If you need to regulate a negative output voltage, you'll need to use a different voltage regulator, such as the LM337.
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The output voltage of the LM317MDT can be adjusted by using a resistive divider network between the output and the adjust pin. The output voltage is determined by the formula: Vout = 1.25V * (1 + R2/R1), where R1 and R2 are the resistors in the divider network.