Product Overview
LM317T three-terminal adjustable positive regulator, TO-220
Condition
New. The photo shows a representative unit from our stock. Same or next business day shipping from our Idaho warehouse. Honest pricing, no nonsense. Online since 1999. We are here for our customers, with a no-hassle satisfaction guarantee.
Product Overview
The mark on the photographed body runs the National Semiconductor logo and 32JD across the top line with LM317T P+ underneath, printed on a black TO-220 case with a bright metal tab and a mounting hole. The LM317 family is the long-running three-terminal adjustable positive regulator, programmed by a resistor pair rather than a fixed internal setting. Twelve are on the shelf here, sold each.
Key Features
- Adjustable positive output, 1.25 V to 37 V, per Texas Instruments' published LM317 data (SLVS044)
- Output current 1.5 A maximum, correct for this TO-220 body, per TI's published LM317 data
- Internal reference 1.25 V nominal between output and adjust, per TI's published LM317 data
- Operating junction temperature 0 C to 125 C for the LM317 grade, per TI's published LM317 data
- Package: TO-220, three leads, T suffix; the photographed body is marked LM317T P+ with the lot string 32JD above it
- Floating two-terminal operation for high-voltage rails is described in TI's published LM317 data
Verify against TI's published LM317 data before designing in.
Applications
- Variable output supplies and lab power bricks
- Trimming a rail to a non-standard value a fixed regulator cannot give
- Current-limited supplies using the reference across a sense resistor
- Board-level repair of older linear regulator circuits
Frequently Asked Questions
How many should I order? Order what the build needs; there are twelve on the shelf, so order the exact count your build needs. Shipping is $8 flat rate and free on orders over $28, so small parts like this ship smartest as part of a larger order.
Does it come with a heatsink or mounting hardware? No. The tab is drilled for a screw, but nothing beyond the regulator itself ships with it; heatsink, insulator and screw are yours to supply. Sold each.
Nothing on the case tells you the output voltage, because that decision is still sitting in your resistor drawer.
