Overview
| Information | Precision Adjustable Shunt Regulator |
|---|---|
| Reference Voltage | Adjustable, Fixed |
| VOUT (V) | - |
| VOUT Adj MIN (V) | 2.5 |
| VOUT Adj MAX (V) | 20 |
| Operating Current (MAX) (mA) | 100 |
| Operating Current (MIN) (mA) | 1 |
| IQ (µA) | 1000 |
| Initial Accuracy (%) | 0.5, 1 |
| IREF (µA) | 0.7 |
| Temperature Coefficient (ppm/°C) | 30 |
| Temperature Range (°C) | 0 to 105 |
| Package | SOT23-3 |
The SPX2431 is a 3-terminal adjustable shunt voltage regulator providing a highly accurate bandgap reference. The SPX2431 acts as an open-loop error amplifier with a 2.5V temperature compensation reference. The SPX2431’s thermal stability, wide operating current (100mA) and temperature range (0°C to 105°C) makes it suitable for a variety of applications that require a low cost, high performance solution. SPX2431A tolerance of 0.5% is proven to be sufficient to overcome all of the other errors in the system to virtually eliminate the need for trimming in the lower supply manufacturer’s assembly lines and contribute a significant cost savings.
The output voltage may be adjusted to any value between VREF and 20 volts with two external resistors. In the standard shunt configuration,
the combination of a low temperature coefficient, sharp turn on characteristics, low output impedance, and programmable output voltage makes this precision reference an excellent error amplifier. The SPX2431 is available in a SOT-23-3 package.
- Trimmed bandgap to 0.5% and 1.0%
- Wide operating current 1mA to 100mA
- Extended temperature. range: 0°C to 105°C
- Low temperature coefficient 30 ppm/°C
- Offered in 3-pin SOT-23 (M)
- Replacement for TL431, AS2431
- Low noise output
- Battery operating equipment
- Adjustable supplies
- Switching power supplies
- Error amplifiers
- Single supply amplifier
- Monitors / VCRs / TVs
- Personal computers
Documentation & Design Tools
| Type | Title | Version | Date | File Size |
|---|---|---|---|---|
| Data Sheets | SPX2431 Precision Adjustable Shunt Regulator | 1A | November 2017 | 410.6 KB |
| Application Notes | AN200, Downloading and Installing CAD Symbols and Footprints with Ultra Librarian | April 2019 | 1.2 MB | |
| Product Brochures | Power Management Brochure | R01 | November 2024 | 2.4 MB |
| Symbols & Footprints | SPX2431AM-L/TR CAD File (.bxl) | September 2018 | 65.9 KB | |
| Symbols & Footprints | SPX2431M-L/TR CAD File (.bxl) | September 2018 | 65.9 KB |
Quality & RoHS
| Part Number | RoHS | Exempt | RoHS | Halogen Free | REACH | TSCA | MSL Rating / Peak Reflow | Package |
|---|---|---|---|---|---|---|---|
| SPX2431AM-L/TR | N | Y | Y | Y | Y | L1 / 260ᵒC | SOT-23-3 |
| SPX2431M-L/TR | N | Y | Y | Y | Y | L1 / 260ᵒC | SOT-23-3 |
Click on the links above to download the Certificate of Non-Use of Hazardous Substances.
Additional Quality Documentation may be available, please Contact Support.
Parts & Purchasing
| Part Number | Pkg Code | Min Temp | Max Temp | Status | Suggested Replacement | Buy Now | Order Samples | PDN |
|---|---|---|---|---|---|---|---|---|
| SPX2431AM | SOT-23-3 | 0 | 105 | OBS | ||||
| SPX2431AM-L | SOT-23-3 | 0 | 105 | OBS | SPX2431M-L/TR | |||
| SPX2431AM-L/TR | SOT-23-3 | 0 | 105 | Active | Order | |||
| SPX2431AM/TR | SOT-23-3 | 0 | 105 | OBS | ||||
| SPX2431AM5 | SOT-23-5 | OBS | ||||||
| SPX2431AM5-L | SOT-23-5 | OBS | ||||||
| SPX2431AM5/TR | SOT-23-5 | OBS | ||||||
| SPX2431M | SOT-23-3 | 0 | 105 | OBS | ||||
| SPX2431M-L | SOT-23-3 | 0 | 105 | OBS | SPX2431M-L/TR | |||
| SPX2431M-L/TR | SOT-23-3 | 0 | 105 | Active | Order | |||
| SPX2431M/TR | SOT-23-3 | 0 | 105 | OBS | ||||
| SPX2431M5 | SOT-23-5 | OBS | ||||||
| SPX2431M5-L | SOT-23-5 | OBS | ||||||
| SPX2431M5/TR | SOT-23-5 | OBS |
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-23-3 |
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| SOT-23-5 |
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Notifications
FAQs & Support
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