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Power Circuits / Linear Regulator ICs / LM317T
Datasheets
LM317T by:

1.5-A, 40-V, adjustable linear voltage regulator 3-TO-220

Part Details for LM317T by Texas Instruments

Results Overview of LM317T by Texas Instruments

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LM317T Information

LM317T by Texas Instruments 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 LM317T

Part # Distributor Description Stock Price Buy
Bristol Electronics   125
RFQ
Bristol Electronics   47
RFQ

Part Details for LM317T

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LM317T Part Data Attributes

Parametric Data
LM317T Texas Instruments
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LM317T Texas Instruments 1.5-A, 40-V, adjustable linear voltage regulator 3-TO-220
Pbfree Code Yes
Rohs Code No
Part Life Cycle Code Obsolete
Ihs Manufacturer TEXAS INSTRUMENTS INC
Part Package Code SFM
Package Description PLASTIC, TO-220, 3 PIN
Pin Count 3
Reach Compliance Code not_compliant
ECCN Code EAR99
HTS Code 8542.39.00.01
Date Of Intro 1989-01-01
Samacsys Manufacturer Texas Instruments
Adjustability ADJUSTABLE
Dropout Voltage1-Nom 2.25 V
Input Voltage-Max 40 V
Input Voltage-Min 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
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
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 Shape RECTANGULAR
Package Style FLANGE MOUNT
Peak Reflow Temperature (Cel) NOT SPECIFIED
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 Position SINGLE
Time@Peak Reflow Temperature-Max (s) NOT SPECIFIED
Voltage Tolerance-Max 5%

Alternate Parts for LM317T

This table gives cross-reference parts and alternative options found for LM317T. 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 LM317T, 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
LM317T Motorola Mobility LLC Check for Price 1.2 V-37V ADJUSTABLE POSITIVE REGULATOR, PSFM3, PLASTIC, TO-220, 3 PIN LM317T vs LM317T
LM317T Analog Devices Inc Check for Price Adjustable Positive Standard Regulator, 1.2V Min, 37V Max, BIPolar, PSFM3 LM317T vs LM317T
LM317T Samsung Semiconductor Check for Price Adjustable Positive Standard Regulator, 1.2V Min, 37V Max, BIPolar, PSFM3, TO-220, 3 PIN LM317T vs LM317T
LM317T#PBF Analog Devices Inc Check for Price Adjustable Positive Standard Regulator, 1.2V Min, 37V Max, BIPolar, PSFM3 LM317T vs LM317T#PBF
LM317T#PBF Linear Technology Check for Price IC VREG 1.2 V-37 V ADJUSTABLE POSITIVE REGULATOR, PSFM3, PLASTIC, TO-220, 3 PIN, Adjustable Positive Single Output Standard Regulator LM317T vs LM317T#PBF
Part Number Manufacturer Composite Price Description Compare
LM317T onsemi Check for Price 3-Terminal 1.5 A Positive Adjustable Voltage Regulator, TO-220-3, 1000-TUBE LM317T vs LM317T
LM317T STMicroelectronics $0.4965 1.2 V to 37 V adjustable voltage regulators LM317T vs LM317T
LM317KC Texas Instruments Check for Price 3/4 Pin 1.5A Adjustable Positive Voltage Regulator 3-TO-220 0 to 125 LM317T vs LM317KC
LM317T2 onsemi Check for Price 1.2 V-37V ADJUSTABLE POSITIVE REGULATOR, PSFM3, PLASTIC, TO-220, 3 PIN LM317T vs LM317T2
LM317DCYRG3 Texas Instruments Check for Price 1.5-A, 40-V, adjustable linear voltage regulator 4-SOT-223 0 to 125 LM317T vs LM317DCYRG3
LM317DCYR Texas Instruments $0.2679 1.5-A, 40-V, adjustable linear voltage regulator 4-SOT-223 0 to 125 LM317T vs LM317DCYR
LM217D2T STMicroelectronics Check for Price 1.2 V to 37 V adjustable voltage regulators LM317T vs LM217D2T
LM217D2T-TR STMicroelectronics $0.9940 1.2 V to 37 V adjustable voltage regulators LM317T vs LM217D2T-TR
LM317CM Promax-Johnton Electronic Corporation Check for Price Adjustable Positive Standard Regulator, 1.2V Min, 37V Max, BIPolar, PSSO3, TO-263, 3 PIN LM317T vs LM317CM
LM317D2TXM Fairchild Semiconductor Corporation Check for Price Adjustable Positive Standard Regulator, 1.2V Min, 37V Max, BIPolar, PSSO3, LEAD FREE, D2PAK-3 LM317T vs LM317D2TXM

LM317T Related Parts

LM317T Frequently Asked Questions (FAQ)

  • The minimum input voltage required for the LM317T to operate is 3V above the output voltage. For example, if the output voltage is 5V, the minimum input voltage would be 8V.

  • 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.

  • The maximum current that the LM317T can handle is 1.5A. However, it's recommended to derate the current to 1A or less to ensure reliable operation.

  • No, the LM317T is designed to regulate positive voltages only. If you need to regulate a negative voltage, you would need to use a different regulator, such as the LM337.

  • The output voltage of the LM317T 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).

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