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TL431D from MOTOROLA

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TL431D

Manufacturer: MOTOROLA, MOT

Programmable Precision References

Partnumber Manufacturer Quantity Availability
TL431D MOTOROLA, MOT 7700 In Stock

Description and Introduction

Programmable Precision References The TL431D from Motorola is a programmable shunt regulator with the following specifications, descriptions, and features:  

### **Specifications:**  
- **Output Voltage Range:** 2.5V to 36V (programmable)  
- **Reference Voltage:** 2.495V (typical)  
- **Operating Cathode Current Range:** 1mA to 100mA  
- **Output Impedance:** 0.2Ω (typical)  
- **Temperature Stability:** ±4mV (over full temperature range)  
- **Operating Temperature Range:** -40°C to +85°C  

### **Descriptions:**  
- The TL431D is a three-terminal adjustable precision shunt regulator.  
- It provides a stable reference voltage that can be adjusted using external resistors.  
- Commonly used in power supply regulation, voltage monitoring, and error amplification circuits.  

### **Features:**  
- **Adjustable Output Voltage** via external resistors  
- **Low Dynamic Output Impedance** (0.2Ω typical)  
- **Sink Current Capability** (up to 100mA)  
- **Low Temperature Drift** (±4mV over full operating range)  
- **Wide Operating Voltage Range** (2.5V to 36V)  
- **Available in TO-92, SOIC, and SOT-23 Packages**  

This device is widely used in switching power supplies, battery chargers, and precision voltage references.

Application Scenarios & Design Considerations

Programmable Precision References

Alternative Part Number

  • LM431ACZ --: Industry-standard adjustable shunt regulator with the same 2.5V reference and pinout, widely available and a direct functional replacement.
  • KA431AZ --: Adjustable precision shunt regulator equivalent to the TL431 family, same TO-92 package and electrical characteristics.
  • AS431ANTR-G1 --: Low-cost adjustable shunt reference with comparable voltage tolerance and current capability, suitable drop-in substitute.

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