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TL431C from KA

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TL431C

Manufacturer: KA, WST, TI, TEXAS, ON, PHILIPS, TI/ST, ST

Adjustable precision shunt regulators

Partnumber Manufacturer Quantity Availability
TL431C KA, WST, TI, TEXAS, ON, PHILIPS, TI/ST, ST 24705 In Stock

Description and Introduction

Adjustable precision shunt regulators The TL431C is a precision programmable shunt regulator manufactured by several companies, including Texas Instruments, ON Semiconductor, and STMicroelectronics. Below are the factual specifications, descriptions, and features from Ic-phoenix technical data files:

### **Manufacturer Specifications:**
- **Output Voltage Range:** 2.495V to 36V (adjustable)  
- **Reference Voltage (Vref):** 2.495V (typical)  
- **Operating Cathode Current (IK):** 1mA to 100mA  
- **Sink Current Capability:** Up to 100mA  
- **Line Regulation:** 0.2% (typical)  
- **Load Regulation:** 0.4% (typical)  
- **Temperature Stability:** ±4mV (over full temperature range)  
- **Operating Temperature Range:**  
  - **Commercial (C):** 0°C to +70°C  
  - **Industrial (I):** -40°C to +85°C  
  - **Military (M):** -55°C to +125°C (depending on manufacturer)  
- **Package Types:** TO-92, SOT-23, SOIC-8  

### **Descriptions:**
- The TL431C is a three-terminal adjustable shunt regulator with thermal stability.  
- It provides a precise reference voltage that can be set using two external resistors.  
- Commonly used in switching power supplies, voltage monitoring, and error amplifiers.  
- Functions as a replacement for Zener diodes in many applications due to better performance.  

### **Features:**  
- **Adjustable Output Voltage:** Programmable via external resistors.  
- **Low Dynamic Output Impedance:** 0.2Ω (typical).  
- **Low Output Noise Voltage.**  
- **Wide Operating Current Range:** 1mA to 100mA.  
- **Equivalent to Industry Standard TL431.**  
- **Available in Multiple Package Options.**  

These details are based on manufacturer datasheets and may vary slightly between different suppliers.

Application Scenarios & Design Considerations

Adjustable precision shunt regulators

Alternative Part Number

  • LM431ACZ --: Pin-compatible adjustable shunt regulator with similar 2.5V reference and tolerance grade, widely available and a common drop-in replacement.
  • KA431AZ --: Same adjustable shunt regulator family from a major vendor, electrically equivalent to TL431C with comparable reference voltage and current capability.
  • AZ431AN-BTRE1 --: Adjustable precision shunt regulator with 2.5V reference, suitable replacement for TL431C in most voltage reference and feedback applications.
  • LM431 --: Industry-standard adjustable shunt regulator with the same 2.5V reference and function as the TL431, widely available and pin-compatible in most packages.
  • KA431 --: Direct functional equivalent adjustable precision shunt regulator, commonly used as a TL431 replacement with similar electrical specifications.
  • AZ431 --: Adjustable shunt regulator offering comparable reference voltage and tolerance, suitable as a drop-in alternative in typical TL431 applications.
  • AZ431AN-ATRE1 --: Low-cost adjustable precision shunt regulator with comparable 1% tolerance and SOT-23/TO-92 options.

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