Product Overview
LM317T adjustable positive voltage regulator, TO-220, 1.5 A
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 photographed body is marked on two lines: the National Semiconductor logo followed by 32HV on the top line, and LM317T P+ on the line below, on a black TO-220 case with a bright metal tab and three straight leads. The LM317 is the standard three-terminal adjustable positive regulator, its output set by two resistors tied to the adjust pin. Twenty-four are on the shelf and they are 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 the output and adjust pins, 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, the T suffix; the photographed body is marked LM317T P+
- 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
- Adjustable rail on a linear bench supply
- Pre-regulating a higher input down to a value between the standard fixed voltages
- Constant-current charging circuits built around the reference voltage
- Service work on older equipment that used a three-terminal adjustable regulator
Frequently Asked Questions
How many should I order? Order the number your build calls for; twenty-four are on the shelf, which covers a small run with spares left over. Shipping is $8 flat rate and free on orders over $28, so small parts like this ship smartest as part of a larger order.
Do I need anything else to use one? Two resistors set the output, and the datasheet circuits add small input and output capacitors. Nothing about that is included here: what ships is the regulator itself, sold each.
Two resistors decide what this one does for a living, and the 32HV printed above the part number is not one of them.
