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ZR431L
Adjustable Precision Shunt Regulator
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Description
The ZR431L is a three terminal adjustable shunt regulator offering excellent temperature stability and output current handling capability up to 25mA. The output voltage may be set to any chosen voltage between 1.24 and 10 volts by selection of two external divider resistors. The devices can be used as a replacement for zener diodes in many applications requiring an improvement in zener performance. The ZR431L is particularly used in the feedback control loop of switch mode power supplies. In this application the device 1.24 volt reference enables the generation of low voltage supplies, typically 3.3 volts or 3 volts.Features and Benefits
• 2.5% and 1% tolerance• Max. temperature coefficient 50 ppm/°C
• Temperature compensated for operation over -40 to 85°C
• 100mA to 25mA current sink capability
• Surface mount SOT23 package
Applications
• Switch mode power supplies• Shunt regulator
• Series regulator
• Voltage monitor
• Over voltage / under voltage protection
Product Overview Specs
| Part Number | ZR431L |
| Reference Voltage V |
1.24 |
| Accuracy % |
1/ 2.5 |
| Max. Input Voltage V |
10 |
| Sink Current mA |
25 |
| Minimum Cathode Current for Regulation typ. μA |
100 |
| Maximum Slope Resistance Ω |
2 |
| Operating Ambient Temperature Range °C |
-40 to +85 |
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Package Outline Information
- SOT23
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