Overview
The SP317 is an adjustable three-terminal positive voltage regulator with a very low dropout of 1.2V at 1A output current. Using 2 external resistors, the SP317 can provide an adjustable output voltage down to 1.25V.
The SP317 includes a circuit of trimmed bandgap reference to assure output voltage accuracy to be within 1%. It also provides current limiting and thermal shutdown. The current limit is trimmed to ensure specified output current and controlled short-circuit current. The On-chip thermal limiting provides protection against any combination of overload and ambient temperature that would create excessive junction temperature.
The SP317 is available in the standard SOT-223, TO-220, TO-252 and TO 263 power packages.
- Typical 1% output voltage tolerance
- Typical 0.01%/V line regulation
- Typical 0.2% load regulation
- Very low dropout voltage: 1.2V at 1A output current
- Trimmed current limit
- On-chip thermal protection
- Operating junction temperature: 0ºC to 25ºC
- Available in RoHS compliant, lead free packaging
Documentation & Design Tools
| Type | Title | Version | Date | File Size |
|---|---|---|---|---|
| Data Sheets | Datasheet | F | November 2007 | 276.9 KB |
| Product Brochures | Power Management Brochure | R03 | April 2025 | 6.2 MB |
Parts & Purchasing
| Part Number | Pkg Code | Min Temp | Max Temp | Status | Suggested Replacement | PDN |
|---|---|---|---|---|---|---|
| SP317J-L | SOT-223-3 | 0 | 125 | OBS | ||
| SP317J-L/TR | SOT-223-3 | 0 | 125 | OBS | ||
| SP317LN1-L | TO-92-3 | 0 | 125 | OBS | Multiple second sources | |
| SP317V-L | TO-220-3 | 0 | 125 | OBS | ||
| SP317V1-L | TO-263-3 | 0 | 125 | OBS | ||
| SP317V1-L/TR | TO-263-3 | 0 | 125 | OBS | V2-L/TR | |
| SP317V2-L | TO-252-3 | 0 | 125 | OBS | ||
| SP317V2-L/TR | TO-252-3 | 0 | 125 | OBS | SPX1117 |
Part Status Legend
Active - the part is released for sale, standard product.
EOL (End of Life) - the part is no longer being manufactured, there may or may not be inventory still in stock.
CF (Contact Factory) - the part is still active but customers should check with the factory for availability. Longer lead-times may apply.
PRE (Pre-introduction) - the part has not been introduced or the part number is an early version available for sample only.
OBS (Obsolete) - the part is no longer being manufactured and may not be ordered.
NRND (Not Recommended for New Designs) - the part is not recommended for new designs.
Active - the part is released for sale, standard product.
EOL (End of Life) - the part is no longer being manufactured, there may or may not be inventory still in stock.
CF (Contact Factory) - the part is still active but customers should check with the factory for availability. Longer lead-times may apply.
PRE (Pre-introduction) - the part has not been introduced or the part number is an early version available for sample only.
OBS (Obsolete) - the part is no longer being manufactured and may not be ordered.
NRND (Not Recommended for New Designs) - the part is not recommended for new designs.
Packaging
| Pkg Code | Details | Quantities | Dimensions |
|---|---|---|---|
| SOT-223-3 |
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| TO-220-3 |
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| TO-252-3 |
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| TO-263-3 |
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| TO-92-3 |
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