LM317T Texas Instruments Integrated Circuit (Transistor Outline, Vertical) In Stock
LM317T is a 3-terminal adjustable positive linear voltage regulator from Texas Instruments, delivering 1.5A output current with output voltage adjustable from 1.2V to 37V and up to 40V input. Available from $0.189 in TO-220-3 package with worldwide shipping.
- Manufacturer
- Texas Instruments
- Package
- Transistor Outline, Vertical
- Pin Count
- 3
- Lifecycle
- OBSOLETE
- Datasheet
- LM317T Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $0.1890(MOQ 1)
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- Adjustable output voltage from 1.2V to 37V with just two external resistors
- 1.5A continuous output current capability in TO-220-3 package
- Input voltage range up to 40V with 2.25V typical dropout voltage
- Built-in current limiting, thermal overload, and safe-area protection
- Industry-standard pinout with over 35 years of proven reliability
Applications
The LM317T is widely used in bench power supplies, battery chargers, and post-regulation stages where a stable, adjustable output voltage is required. It suits consumer electronics, industrial control boards, and LED driver circuits needing 1.2V–37V rails at up to 1.5A. Its simple two-resistor programming network makes it ideal for prototyping and cost-sensitive designs that demand reliable linear regulation.
Specifications
| Pbfree Code | Yes |
| Date Of Intro | 1989-01-01 |
| YTEOL | 0 |
| Adjustability | ADJUSTABLE |
| Dropout Voltage1-Nom | 2.25V |
| Input Voltage-Max | 40V |
| Input Voltage-Min | 3V |
| Input-Output Voltage Differential-Max | 40V |
| Input-Output Voltage Differential-Min | 3V |
| JESD-30 Code | R-PSFM-T3 |
| JESD-609 Code | e0 |
| Line Regulation-Max (%/V) | 0.07 |
| Load Regulation-Max(%) | 1.5% |
| Number of Functions | 1 |
| Number of Outputs | 1 |
| Operating Temperature TJ-Max | 125°C |
| Output Current1-Max | 1.5A |
| Output Voltage1-Max | 37V |
| Output Voltage1-Min | 1.2V |
| Package Body Material | PLASTIC/EPOXY |
| Package Shape | RECTANGULAR |
| Package Style | FLANGE MOUNT |
| Packing Method | TUBE |
| 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 Pitch | 2.54mm |
| Terminal Position | SINGLE |
| Time@Peak Reflow Temperature-Max (s) | NOT SPECIFIED |
| Voltage Tolerance-Max | 5% |
| ## LM317T Alternates Showing results | Image |
| Package | Transistor Outline, Vertical |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Moisture Sensitivity Level | MSL 1 |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.60 |
Alternate & Equivalent Parts
Compatible alternatives and drop-in replacements for LM317T:
Regulator, 1.2V Min, 37V Max, BIPolar, PSFM3
suggested
Adjustable Positive Standard Regulator, 1.25V Min, 37V Max, BIPolar, PSSO3
Adjustable Positive Standard Regulator, 1.25V Min, 37V Max, BIPolar, PSFM3
Adjustable Positive Standard Regulator, 1.2V Min, 37V Max, BIPolar, PSFM3
Frequently Asked Questions
What is the output voltage range of the LM317T?
The LM317T provides an adjustable output voltage from 1.2V to 37V, set by two external resistors connected between the ADJ and OUTPUT pins. This wide range makes it suitable for a broad variety of regulated power supply designs.
How much output current can the LM317T supply?
The LM317T is rated for up to 1.5A continuous output current in its TO-220-3 package. With proper heatsinking and adequate input-output voltage differential, it can maintain stable regulation across the full 1.5A load range.
What is the maximum input voltage for the LM317T?
The LM317T accepts a maximum input voltage of 40V. The minimum input-to-output differential required for proper regulation is 3V (dropout), and the maximum differential is 40V, so the output must be set accordingly to avoid exceeding device limits.
What package does the LM317T come in and what are common alternatives?
The LM317T uses the standard TO-220-3 through-hole package, making it easy to mount on heatsinks. Functionally equivalent alternatives include the LM317L (TO-92, 100mA), LM317HV (higher input voltage), and LM1117 series for lower dropout applications.
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About Texas Instruments
Texas Instruments (TI) is a global semiconductor company headquartered in Dallas, Texas. TI designs and manufactures analog and embedded processing chips used in industrial, automotive, consumer, communications, and enterprise systems.
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