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TL431B from 绿标

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TL431B

Manufacturer: 绿标

Programmable Precision Reference

Partnumber Manufacturer Quantity Availability
TL431B 绿标 11297 In Stock

Description and Introduction

Programmable Precision Reference The TL431B is a three-terminal adjustable precision shunt regulator. Below are its specifications, descriptions, and features:

### **Manufacturer Specifications:**  
- **Manufacturer:** Texas Instruments (TI)  
- **Type:** Adjustable Precision Shunt Regulator  
- **Reference Voltage:** 2.495V (Typical)  
- **Voltage Range:** 2.5V to 36V  
- **Output Current:** 1mA to 100mA  
- **Temperature Stability:** ±4mV (0°C to 70°C)  
- **Operating Temperature Range:**  
  - Commercial Grade (TL431B): 0°C to +70°C  
  - Industrial Grade (TL431C): -40°C to +85°C  
  - Military Grade (TL431A): -55°C to +125°C  
- **Package Options:** TO-92, SOT-23, SOIC-8  

### **Descriptions:**  
- The TL431B is a programmable precision voltage reference that can be adjusted with two external resistors.  
- It is commonly used in power supply feedback circuits, voltage monitoring, and as a replacement for Zener diodes.  
- The device maintains a stable reference voltage with low dynamic impedance.  

### **Features:**  
- **Adjustable Output Voltage:** Set via external resistors.  
- **Low Output Noise:** Suitable for precision applications.  
- **Low Dynamic Impedance:** 0.2Ω (Typical).  
- **Wide Operating Current Range:** 1mA to 100mA.  
- **High Stability Over Temperature:** Low drift.  
- **Sink Current Capability:** Up to 100mA.  
- **Available in Multiple Grades:** Commercial (B), Industrial (C), and Military (A).  

This information is based solely on the manufacturer's datasheet and technical documentation.

Application Scenarios & Design Considerations

Programmable Precision Reference

Alternative Part Number

  • LM431 --: Industry-standard adjustable shunt regulator with the same function and pinout as the TL431, widely available and well documented.
  • KA431 --: Direct functional equivalent adjustable precision shunt regulator, commonly used as a TL431 replacement in power supply and reference circuits.
  • AZ431 --: Adjustable shunt regulator with comparable voltage reference tolerance and current capability, suitable drop-in substitute for TL431B.

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