Texas Instruments LM317AT LDO Voltage Regulators
IC REG LIN POS ADJ 1.5A TO220-3
Same model may have multiple batches, images only for reference.
Manufacturer
Part Number (MPN)
LM317AT
Base Model
Detailed Description
Adjustable positive linear voltage regulator, 1.5A output current, 40V maximum input voltage. Features 1% output voltage accuracy, 2V dropout voltage, and a 1.262V reference voltage. Operates across a -40°C to 125°C temperature range. Packaged in a TO-220 case for through-hole mounting.
Package
TO-220
Lifecycle Status
Not For New Designs
RoHS State
Not CompliantNo
Datasheet
LM317AT Datasheet
Quick Jump:
Technical Specifications
Texas Instruments LM317AT LDO Voltage Regulators technical specifications.
General
RoHS
No
Package / Case
TO-220-3
Mounting Type
Through Hole
Operating Temperature
-40°C ~ 125°C
Supply Voltage
3V ~ 40V
Lifecycle Status
Not For New Designs
Accuracy
1%
Package
TO-220
Current Rating
1.5A
Voltage Dropout
2V
Alternate Parts Comparison (LM317AT vs LM317AT/E7001847 vs LM317AT/NOPB vs LM3S1332-EQC50-A2T)
Side-by-side technical parameter comparison of related primary models in this product family.
| This Part | Alternate Parts | Alternate Parts | Alternate Parts | |
|---|---|---|---|---|
| Package / Case | TO-220-3 | TO-220-3 | TO-220-3 | 100-LQFP |
| Mounting Type | Through Hole | Through Hole | Through Hole | Surface Mount |
| Operating Temperature | -40°C ~ 125°C | -40°C ~ 125°C | -40°C ~ 125°C | -40°C ~ 105°C (TA) |
| Max Input Voltage | 40V | 40V | 40V | -- |
| Output Configuration | Positive | Positive | Positive | -- |
| Output Current | 1.5A | 1.5A | 1.5A | -- |
| Output Type | Adjustable | Fixed | Adjustable | -- |
| Output Voltage | 37V | 1.25V | 1.25V | -- |
| Protection Features | Over Current, Over Temperature, Short Circuit | Over Current, Over Temperature, Short Circuit | Over Current, Over Temperature, Short Circuit | -- |
| PSRR | 65dB | 80dB ~ 65dB (120Hz) | 80dB ~ 65dB (120Hz) | -- |
| Quiescent Current | 10 mA | 10 mA | 10 mA | -- |
| Voltage Output Max | 37V | 37V | 37V | -- |
| Action |
Texas Instruments LM317AT LDO Voltage Regulators Overview
Adjustable positive linear voltage regulator, 1.5A output current, 40V maximum input voltage. Features 1% output voltage accuracy, 2V dropout voltage, and a 1.262V reference voltage. Operates across a -40°C to 125°C temperature range. Packaged in a TO-220 case for through-hole mounting.
Cross Reference
Manufacturer-stated alternates from official cross-reference tools. These are not a guaranteed pin-compatible drop-in. Qualify package, pinout, and electrical limits against the datasheet before a board change. See cross-reference vs drop-in compatible .
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