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TL1431 from ST,ST Microelectronics

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TL1431

Manufacturer: ST, TI

PROGRAMMABLE VOLTAGE REFERENCE

Partnumber Manufacturer Quantity Availability
TL1431 ST, TI 2060 In Stock

Description and Introduction

PROGRAMMABLE VOLTAGE REFERENCE The TL1431 is a precision programmable voltage reference manufactured by Texas Instruments (TI). Below are its specifications, descriptions, and features:

### **Specifications:**  
- **Output Voltage Range:** 2.5V to 36V (adjustable)  
- **Reference Voltage:** 2.495V (typical)  
- **Initial Accuracy:** ±0.4% (A grade), ±1% (standard grade)  
- **Temperature Drift:** 6 ppm/°C (A grade), 25 ppm/°C (standard grade)  
- **Operating Current Range:** 1mA to 100mA  
- **Sink Current Capability:** Up to 100mA  
- **Operating Temperature Range:** -40°C to +125°C  
- **Package Options:** TO-92, SOT-23, SOIC-8  

### **Descriptions:**  
The TL1431 is a three-terminal adjustable shunt regulator that provides stable voltage references for various applications. It can be programmed to output a specific voltage using external resistors. It is commonly used in power supplies, battery chargers, and voltage monitoring circuits.  

### **Features:**  
- **Adjustable Output Voltage** via external resistors  
- **Low Output Noise** for precision applications  
- **Wide Operating Range** (2.5V to 36V)  
- **High Output Current Capability** (up to 100mA)  
- **Low Dynamic Impedance** (0.22Ω typical)  
- **Available in Multiple Grades** for different accuracy needs  
- **Stable Over Temperature and Load Variations**  

This information is sourced from Texas Instruments' official documentation.

Application Scenarios & Design Considerations

PROGRAMMABLE VOLTAGE REFERENCE

Alternative Part Number

  • LMV431AIM5 --: Adjustable shunt regulator with 1.24V reference, similar function and pinout, widely available and low cost.
  • KA431AZ --: Classic adjustable shunt regulator with 2.5V reference, direct functional equivalent to TL1431 in many applications.
  • TL431ACLP --: Industry-standard adjustable shunt regulator with 2.5V reference, very common and well-documented alternative.
  • LM431 --: Industry-standard adjustable shunt reference with the same function and similar 2.5V reference voltage, widely used as a direct substitute for the TL1431.
  • KA431 --: Adjustable precision shunt regulator functionally equivalent to the TL1431, with comparable reference voltage and current capability.
  • AZ431 --: Adjustable shunt voltage reference offering similar electrical characteristics and pinout, suitable as a drop-in replacement.

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