Overview
| Information | Precision Adjustable Shunt Regulator |
|---|---|
| Reference Voltage | Adjustable, Fixed |
| VOUT (V) | - |
| VOUT Adj MIN (V) | 2.5 |
| VOUT Adj MAX (V) | 36 |
| Operating Current (MAX) (mA) | 150 |
| Operating Current (MIN) (mA) | 1 |
| IQ (µA) | 1000 |
| Initial Accuracy (%) | 0.50 |
| IREF (µA) | 0.7 |
| Temperature Coefficient (ppm/°C) | 30 |
| Temperature Range (°C) | -40 to 125 |
| Package | SOT89-3 |
The SPX431A is a three-terminal adjustable shunt voltage regulator providing a highly accurate bandgap reference.
The SPX431A acts as an open-loop error amplifier with a 2.5V temperature compensation reference. The SPX431A has thermal stability, wide operating current of 150mA and broad temperature range of -40°C to 125°C, making it suitable for a variety of applications which require a low-cost, high performance solution. The SPX431A tolerance of 0.5% is proven to be sufficient to overcome all other errors in the system to virtually eliminate the need for trimming in the power supply manufacturer's assembly line and contribute a significant cost savings. The output voltage may be adjusted to any value between VREF and 36 volts with two external resistors.
The SPX431A is available in RoHS compliant, lead free TO-92 and SOT-89 packages.
- 0.5% precise output voltage
- Adjustable up to 36V
- Wide operating current
- 1mA to 150mA
- Low temperature coefficient at 30ppm/°C
- Extended temperature range
- -40°C to 125°C
- Improved replacment for TL431
- RoHS compliant, lead free TO-92 and SOT-89 packages
- Charger
- Switching power supplies
- Graphics card
- Monitors, VCR, TV
Documentation & Design Tools
| Type | Title | Version | Date | File Size |
|---|---|---|---|---|
| Data Sheets | SPX431A Precision Adjustable Shunt Regulator | 2.0.1 | November 2022 | 954.9 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 | SPX431AM1-L/TR CAD File (.bxl) | September 2018 | 27.8 KB |
Quality & RoHS
Parts & Purchasing
| Part Number | Pkg Code | Min Temp | Max Temp | Status | Suggested Replacement | PDN |
|---|---|---|---|---|---|---|
| SPX431AM1-L/TR | SOT-89-3 | -40 | 125 | OBS | SPX1431M1-L/TR | |
| SPX431AN-L/TR | TO-92-3 | -40 | 125 | OBS | SPX431AM1-L/TR |
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
Notifications
FAQs & Support
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