Texas Instruments LM317AT
LM317AT variants from Texas Instruments
LM317AT Overview
What changes between part numbers, and what to check before you lock the BOM — general-purpose circuits.
Key Features
- Footprint / package: TO-220Single package option across listed variants; still confirm reel vs tube suffix if you auto-insert.
- Lifecycle mix: ActiveConfirm lifecycle on the exact MPN, not just the base number prefix.
Target Applications
- general-purpose circuits — design-in and field replacement
- BOM scrub where only the base prefix is known but suffix is TBD
- Second-source checks when the original MPN is constrained
Ordering Variants
Compare 2 LM317AT part numbers by package, electrical parameters, lifecycle, and availability. Use RFQ for stock and lead-time confirmation.
| Part Number | Description | Package Type | Manufacturer | Lifecycle | RoHS | Availability | Action |
|---|---|---|---|---|---|---|---|
| LM317AT | Package: TO-220 | Max Supply Voltage: 40V | Min Supply Voltage: 3V | Output Voltage: 37V | Output Current: 1.5A | Max Output Current: 1.5A | Max Input Voltage: 40V | Number of Outputs: 1 | TO-220 | Texas Instruments | Active | Compliant | In Stock | |
| LM317AT/NOPB | 1.5A Adj. LDO, 40V In, 1.25-37V Out, 1% Acc, TO-220 | - | Texas Instruments | Active | Compliant | In Stock |
Ordering Code Differences
How suffixes on LM317AT map to package, grade, and reel options.
How to Choose the Right LM317AT Variant
Match the footprint first
Packages here: TO-220. Open the land-pattern drawing before you substitute a different suffix.
Electrical headroom
Compare voltage and current columns in the variant table. For LM317AT, a suffix with lower voltage or current rating will not survive the same circuit without recalculation.
Temp grade letter matters
Commercial (0–70 °C) and industrial (−40–85 °C+) suffixes look similar in the prefix — confirm ambient + self-heating, not just the first page of the datasheet.
Copy the full MPN
Do not BOM only "LM317AT" — include the full suffix (e.g. NOPB). RFQ with reel/tube preference and required date code.
Technical Specifications
Core parameters for LM317AT product family
Identity
Variant Parameters
Source LM317AT with Octatronics
Request stock confirmation, lead time, date code, and pricing for all 2 ordering variants from Texas Instruments. Our team supports active, EOL, and hard-to-find component sourcing.
- Original manufacturer parts with traceability options
- BOM upload and multi-line RFQ support
- Package, grade, and compliance verification
Frequently Asked Questions
Common technical questions about the LM317AT product family.