|Information||250mA Low Dropout Voltage Regulator|
|VOUT (V)||3.3, 5.0|
|VOUT Adj MIN (V)||-|
|VOUT Adj MAX (V)||-|
|VIN MIN (V)||2.4|
|VIN MAX (V)||30|
|Features||Enable,Power Good,Current limit and thermal protection|
|Junction Temp Range (°C)||-40 to 125|
|Accuracy (%)||0.5%, 1%|
|Output Noise (µVRMS)||160|
The SPX2954 and SPX2954A are low power voltage regulators. These devices are an excellent choice for use in battery powered applications such as cordless telephones, radio control systems and portable computers. The SPX2954 and SPX2954A feature low quiescent current and low dropout voltage (typical 20mV at 100μA and 310mV at 250mA). This includes a tight initial tolerance (0.5% for SPX2954A), extremely good load and line regulation (0.05% typical) and very low output temperature coefficient (20 ppm/°C typical), making the SPX2954/SPX2954A useful as a low power voltage reference.
The error flag output feature is used as a power-on reset for warning of a low output voltage, due to a falling input voltage. The logic-compatible shutdown feature enables the regulator to be switched on and off. The SPX2954/SPX2954A is offered in 3-pin TO-92, TO-263, SOT-223 and TO-220 packages and an 8-pin SOIC package.
- 5.0V and 3.3V versions at 250mA output
- Accurate 0.5% for SPX2954A
- Very low quiescent current
- Low dropout: 310mV at 250mA
- Extremely tight load and line regulation
- Very low temperature coefficient
- Current and thermal limiting
- Need only 1μF for stability
- Direct replacement for LP2954
- 8-pin versions only
- Error flag warns of output dropout
- Logic controlled electronic shutdown
- Programmable output from 1.24V to 30V
Documentation & Design Tools
|Data Sheets||SPX2954 250mA Low Dropout Voltage Regulator||1A||August 2017||575 KB|
|Application Notes||AN200, Downloading and Installing CAD Symbols and Footprints with Ultra Librarian||April 2019||1.2 MB|
|Product Brochures||Power Management Brochure||October 2020||2.4 MB|
|Symbols & Footprints||SPX2954AM3-L-5-0/TR CAD File (.bxl)||September 2018||24.9 KB|
|Symbols & Footprints||SPX2954M3-L-3-3/TR CAD File (.bxl)||September 2018||24.9 KB|
|Symbols & Footprints||SPX2954M3-L-5-0/TR CAD File (.bxl)||September 2018||24.9 KB|
Quality & RoHS
|Part Number||RoHS | Exempt||RoHS||Halogen Free||REACH||TSCA||MSL Rating / Peak Reflow||Package|
|SPX2954AM3-L-5-0/TR||N||Y||Y||Y||Y||L1 / 260ᵒC||SOT-223-3|
|SPX2954M3-L-3-3/TR||N||Y||Y||Y||Y||L1 / 260ᵒC||SOT-223-3|
|SPX2954M3-L-5-0/TR||N||Y||Y||Y||Y||L1 / 260ᵒC||SOT-223-3|
Click on the links above to download the Certificate of Non-Use of Hazardous Substances.
Parts & Purchasing
|Part Number||Pkg Code||Min Temp||Max Temp||Status||Suggested Replacement||Buy Now||Order Samples||PDN|
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.
FAQs & Support
Search our list of FAQs for answers to common technical questions.
For material content, environmental, quality and reliability questions review the Quality tab or visit our Quality page.
For ordering information and general customer service visit our Contact Us page.
Submit a Technical Support Question As a New Question
In this example, we looked for XRA1201. Click on part number header or on the link at the bottom of the result. This brings you to the product page. For example:
Click on Parts & Purchasing, highlighted with the blue arrow above. The screen changes to:
Notice the status column and the “Show obsolete parts” link. A legend tells you the definition of the different statuses. Click on the “Show obsolete parts” link to see EOL or OBS part numbers along with the Active part numbers, the legend still present:
Another method to find out if a part is OBS or EOL is to click on SUPPORT at the top:
And then Product Change Notifications:
Type the part into the search, and click on one of the part numbers from the drop down menu. Then you can look for the Product Discontinuation Notice, which generally is at the top of the list, for example:
If you see this, it tells you that this particular orderable part has been discontinued and when the last order date is, or was. If you click on the file, then you can view the notice we sent about this if you purchased the part in the recent past. It may also advise of a replacement part. When an orderable part first becomes discontinued, Product Discontinuation Notices are sent are sent to those who have purchased the parts in the recent past, if purchased directly, with a dated opportunity to place a last order.