SLVS543S August   2004  – May 2024 TL431 , TL432

PRODUCTION DATA  

  1.   1
  2. 1 Features
  3. 2 Applications
  4. 3 Description
  5. 4 Device Comparison Table
  6. 5 Pin Configuration and Functions
  7. 6 Specifications
    1. 6.1  Absolute Maximum Ratings
    2. 6.2  ESD Ratings
    3. 6.3  Thermal Information
    4. 6.4  Recommended Operating Conditions
    5. 6.5  Electrical Characteristics, TL431C, TL432C
    6. 6.6  Electrical Characteristics, TL431I, TL432I
    7. 6.7  Electrical Characteristics, TL431Q, TL432Q
    8. 6.8  Electrical Characteristics, TL431AC, TL432AC
    9. 6.9  Electrical Characteristics, TL431AI, TL432AI
    10. 6.10 Electrical Characteristics, TL431AQ, TL432AQ
    11. 6.11 Electrical Characteristics, TL431BC, TL432BC
    12. 6.12 Electrical Characteristics, TL431BI, TL432BI
    13. 6.13 Electrical Characteristics, TL431BQ, TL432BQ
    14. 6.14 Typical Characteristics
  8. 7 Parameter Measurement Information
    1. 7.1 Temperature Coefficient
    2. 7.2 Dynamic Impedance
  9. 8 Detailed Description
    1. 8.1 Overview
    2. 8.2 Functional Block Diagram
    3. 8.3 Feature Description
    4. 8.4 Device Functional Modes
      1. 8.4.1 Open Loop (Comparator)
      2. 8.4.2 Closed Loop
  10. 9 Applications and Implementation
    1. 9.1 Application Information
    2. 9.2 Typical Applications
      1. 9.2.1 Comparator With Integrated Reference
        1. 9.2.1.1 Design Requirements
        2. 9.2.1.2 Detailed Design Procedure
          1. 9.2.1.2.1 Basic Operation
            1. 9.2.1.2.1.1 Overdrive
          2. 9.2.1.2.2 Output Voltage and Logic Input Level
            1. 9.2.1.2.2.1 Input Resistance
        3. 9.2.1.3 Application Curve
      2. 9.2.2 Shunt Regulator/Reference
        1. 9.2.2.1 Design Requirements
        2. 9.2.2.2 Detailed Design Procedure
          1. 9.2.2.2.1 Programming Output/Cathode Voltage
          2. 9.2.2.2.2 Total Accuracy
          3. 9.2.2.2.3 Stability
          4. 9.2.2.2.4 Start-Up Time
        3. 9.2.2.3 Application Curve
    3. 9.3 System Examples
    4. 9.4 Power Supply Recommendations
    5. 9.5 Layout
      1. 9.5.1 Layout Guidelines
      2. 9.5.2 Layout Example
  11. 10Device and Documentation Support
    1. 10.1 Device Nomenclature
    2. 10.2 Related Links
    3. 10.3 Receiving Notification of Documentation Updates
    4. 10.4 Support Resources
    5. 10.5 Trademarks
    6. 10.6 Electrostatic Discharge Caution
    7. 10.7 Glossary
  12. 11Revision History
  13. 12Mechanical, Packaging, and Orderable Information

Package Options

Mechanical Data (Package|Pins)
Thermal pad, mechanical data (Package|Pins)
Orderable Information

9.3 System Examples

TL431 TL432 Precision High-Current Series Regulator
A. R should provide cathode current ≥1mA to the TL431 at minimum V(BATT).
Figure 9-5 Precision High-Current Series Regulator
TL431 TL432 Output Control of a Three-Terminal Fixed RegulatorFigure 9-6 Output Control of a Three-Terminal Fixed Regulator
TL431 TL432 High-Current Shunt RegulatorFigure 9-7 High-Current Shunt Regulator
TL431 TL432 Crowbar Circuit
A. Refer to the stability boundary conditions in Figure 6-16 and Figure 6-18 to determine allowable values for C.
Figure 9-8 Crowbar Circuit
TL431 TL432 Precision 5V, 1.5A RegulatorFigure 9-9 Precision 5V, 1.5A Regulator
TL431 TL432 Efficient 5V Precision Regulator
A. Rb should provide cathode current ≥1mA to the TL431.
Figure 9-10 Efficient 5V Precision Regulator
TL431 TL432 PWM Converter With ReferenceFigure 9-11 PWM Converter With Reference
TL431 TL432 Voltage Monitor
A. Select R3 and R4 to provide the desired LED intensity and cathode current ≥1mA to the TL431 at the available VI(BATT).
Figure 9-12 Voltage Monitor
TL431 TL432 Delay TimerFigure 9-13 Delay Timer
TL431 TL432 Precision Current LimiterFigure 9-14 Precision Current Limiter
TL431 TL432 Precision Constant-Current SinkFigure 9-15 Precision Constant-Current Sink