Overview
| Information | Precision Adjustable Shunt Regulator |
|---|---|
| Reference Voltage | Adjustable, Fixed |
| VOUT (V) | - |
| VOUT Adj MIN (V) | 1.24 |
| VOUT Adj MAX (V) | 18 |
| Operating Current (MAX) (mA) | 80 |
| Operating Current (MIN) (mA) | 1 |
| IQ (µA) | 1000 |
| Initial Accuracy (%) | 1.0 |
| IREF (µA) | 3 |
| Temperature Coefficient (ppm/°C) | 50 |
| Temperature Range (°C) | 0 to 105 |
| Package | SOT23-3, TO92-3 |
The SPX432 is a 3-terminal adjustable shunt voltage regulator providing a highly accurate 1.24V bandgap reference with 0.5% tolerance. The SPX432’s thermal stability, wide operating current (80mA) and temperature range (0°C to 105°C) makes it suitable for a variety of applications. SPX432 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 power supply manufactures’ assembly lines and contribute a significant cost savings.
The SPX432 is an ideal voltage reference in an isolated feedback circuit for switch mode power supplies. SPX432 offers many advantages over the TLV431 such as wider output voltage (18V vs. 6V), higher output current (80mA vs. 15mA) and a wider operating temperature range with a tighter tolerance down to 0.5%.
- Low Voltage Operation, 1.24V
- Trimmed Bandgap to 0.5% and 1%
- Wide Operating Current, 1mA to 80mA
- Adjustable Output Voltage, VREF to 18V
- Extended Temp. Range: 0°C to 105°C
- Low Temperature Coefficient, 50 ppm/°C
- Offered in TO-92, SOIC, SOT-23-3
- Replacement for TLV431, AS432
- Switching Power Supplies
- Adjustable Supplies
- Error Amplifiers
- Single Supply Amplifier
- Monitors / VCRs / TVs
- Personal Computers
- Voltage References
Documentation & Design Tools
| Type | Title | Version | Date | File Size |
|---|---|---|---|---|
| Data Sheets | SPX432 1.24V Precision Adjustable Shunt Regulator | 1.0.0 | December 2006 | 139.4 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 |
| Product FAQs | SPX432 FAQ | 1.0.0 | March 2007 | 165 KB |
| Symbols & Footprints | SPX432M-L/TR CAD File (.bxl) | September 2018 | 60.1 KB |
Quality & RoHS
Parts & Purchasing
| Part Number | Pkg Code | Min Temp | Max Temp | Status | Suggested Replacement | Buy Now | Order Samples | PDN |
|---|---|---|---|---|---|---|---|---|
| SPX432AM | SOT-23-3 | 0 | 105 | OBS | ||||
| SPX432AM-L | SOT-23-3 | 0 | 105 | OBS | SPX432AM-L/TR | |||
| SPX432AM-L/TR | SOT-23-3 | 0 | 105 | OBS | SPX432M-L/TR | |||
| SPX432AM/TR | SOT-23-3 | 0 | 105 | OBS | ||||
| SPX432AM1 | SOT-89-3 | OBS | ||||||
| SPX432AM1-L | SOT-89-3 | OBS | ||||||
| SPX432AM1/TR | SOT-89-3 | OBS | ||||||
| SPX432AM5 | SOT-23-5 | OBS | ||||||
| SPX432AM5-L | SOT-23-5 | OBS | ||||||
| SPX432AM5/TR | SOT-23-5 | OBS | ||||||
| SPX432AN | TO-92-3 | OBS | ||||||
| SPX432AN-L | TO-92-3 | 0 | 105 | OBS | SPX432N-L | |||
| SPX432AN-L/TR | TO-92-3 | 0 | 105 | OBS | SPX432N-L/TR | |||
| SPX432AN/TR | TO-92-3 | 0 | 105 | OBS | ||||
| SPX432AS | NSOIC8 | OBS | ||||||
| SPX432AS-L | NSOIC8 | OBS | ||||||
| SPX432AS-L/TR | NSOIC8 | OBS | ||||||
| SPX432AS/TR | NSOIC8 | OBS | ||||||
| SPX432M | SOT-23-3 | 0 | 105 | OBS | ||||
| SPX432M-L | SOT-23-3 | 0 | 105 | OBS | SPX432M-L/TR | |||
| SPX432M-L/TR | SOT-23-3 | 0 | 105 | Active | Order | |||
| SPX432M/TR | SOT-23-3 | 0 | 105 | OBS | ||||
| SPX432M1 | SOT-89-3 | OBS | ||||||
| SPX432M1-L | SOT-89-3 | OBS | ||||||
| SPX432M1/TR | SOT-89-3 | OBS | ||||||
| SPX432M5 | SOT-23-5 | OBS | ||||||
| SPX432M5-L | SOT-23-5 | OBS | ||||||
| SPX432M5/TR | SOT-23-5 | OBS | ||||||
| SPX432N | TO-92-3 | 0 | 105 | OBS | ||||
| SPX432N-L | TO-92-3 | 0 | 105 | OBS | SPX432M-L/TR | |||
| SPX432N-L/TR | TO-92-3 | 0 | 105 | OBS | SPX432M-L/TR | |||
| SPX432N/TR | TO-92-3 | OBS | ||||||
| SPX432S | NSOIC8 | OBS | ||||||
| SPX432S-L | NSOIC8 | 0 | 105 | OBS | ||||
| SPX432S-L/TR | NSOIC8 | OBS | ||||||
| SPX432S/TR | NSOIC8 | 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 |
|---|---|---|---|
| NSOIC8 |
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| SOT-23-3 |
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| SOT-23-5 |
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| SOT-89-3 |
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| TO-92-3 |
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Notifications
FAQs & Support
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