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TL431 Adjustable Precision Shunt Regulator TO-92 Package

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Description

The TL431 is an adjustable shunt regulator that provides a stable reference voltage ranging from 2.495V to 36V. It operates similarly to a zener diode but with the advantage of adjustability, allowing for precise voltage regulation in various circuits. The device is available in several packages, including the popular TO-92 package, which is commonly used in through-hole applications.

Features

  • Adjustable Output Voltage: The output voltage can be adjusted from 2.495V to 36V using two external resistors.
  • Precise Voltage Reference: Provides a highly accurate reference voltage with a typical tolerance of ±1% (A-grade) or ±2% (standard grade).
  • Low Temperature Coefficient: Ensures minimal variation in output voltage with changes in temperature, typically 50 ppm/°C.
  • Wide Operating Range: Operates with cathode current from 1 mA to 100 mA, making it suitable for various load conditions.
  • Low Dynamic Impedance: Ensures stable performance with varying load currents, typically 0.22Ω.
  • Internal Compensation: The device is internally compensated for stable operation without the need for external capacitors.
  • High Stability: Provides stable operation over a wide range of temperatures and input voltages.
  • Available in TO-92 Package: Compact and easy to use for through-hole mounting in various circuit designs.

Specifications

  • Reference Voltage (Vref): 2.495V (typical)
  • Adjustable Output Voltage Range: 2.495V to 36V
  • Reference Voltage Tolerance:
    • A-grade: ±1%
    • Standard grade: ±2%
  • Temperature Coefficient: Typically 50 ppm/°C
  • Dynamic Impedance: Typically 0.22Ω
  • Cathode Current Range: 1 mA to 100 mA
  • Maximum Cathode Voltage: 37V
  • Operating Temperature Range: -40°C to +85°C
  • Package Type: TO-92 (through-hole)

Applications

  • Voltage Regulation: Used in power supplies to maintain a stable output voltage.
  • Precision Reference Source: Serves as a precise reference voltage in ADCs, DACs, and other analog circuits.
  • Battery Chargers: Provides adjustable regulation in battery charging circuits.
  • Overvoltage/Undervoltage Protection: Used in protection circuits for sensing and controlling voltage levels.
  • Switching Power Supplies: Used for feedback control in switching regulators and converters.

Note

* Product Images are shown for illustrative purposes only and may differ from actual product

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