SLVS543P August   2004  – November 2018 TL431 , TL432

PRODUCTION DATA.  

  1. Features
  2. Applications
    1.     Simplified Schematic
  3. Description
  4. Revision History
  5. Device Comparison Table
  6. Pin Configuration and Functions
    1.     Pin Functions
  7. Specifications
    1. 7.1  Absolute Maximum Ratings
    2. 7.2  ESD Ratings
    3. 7.3  Thermal Information
    4. 7.4  Recommended Operating Conditions
    5. 7.5  Electrical Characteristics, TL431C, TL432C
    6. 7.6  Electrical Characteristics, TL431I, TL432I
    7. 7.7  Electrical Characteristics, TL431Q, TL432Q
    8. 7.8  Electrical Characteristics, TL431AC, TL432AC
    9. 7.9  Electrical Characteristics, TL431AI, TL432AI
    10. 7.10 Electrical Characteristics, TL431AQ, TL432AQ
    11. 7.11 Electrical Characteristics, TL431BC, TL432BC
    12. 7.12 Electrical Characteristics, TL431BI, TL432BI
    13. 7.13 Electrical Characteristics, TL431BQ, TL432BQ
    14. 7.14 Typical Characteristics
  8. Parameter Measurement Information
  9. Detailed Description
    1. 9.1 Overview
    2. 9.2 Functional Block Diagram
    3. 9.3 Feature Description
    4. 9.4 Device Functional Modes
      1. 9.4.1 Open Loop (Comparator)
      2. 9.4.2 Closed Loop
  10. 10Applications and Implementation
    1. 10.1 Application Information
    2. 10.2 Typical Applications
      1. 10.2.1 Comparator With Integrated Reference
        1. 10.2.1.1 Design Requirements
        2. 10.2.1.2 Detailed Design Procedure
          1. 10.2.1.2.1 Basic Operation
            1. 10.2.1.2.1.1 Overdrive
          2. 10.2.1.2.2 Output Voltage and Logic Input Level
            1. 10.2.1.2.2.1 Input Resistance
        3. 10.2.1.3 Application Curve
      2. 10.2.2 Shunt Regulator/Reference
        1. 10.2.2.1 Design Requirements
        2. 10.2.2.2 Detailed Design Procedure
          1. 10.2.2.2.1 Programming Output/Cathode Voltage
          2. 10.2.2.2.2 Total Accuracy
          3. 10.2.2.2.3 Stability
          4. 10.2.2.2.4 Start-Up Time
        3. 10.2.2.3 Application Curve
    3. 10.3 System Examples
  11. 11Power Supply Recommendations
  12. 12Layout
    1. 12.1 Layout Guidelines
    2. 12.2 Layout Example
  13. 13Device and Documentation Support
    1. 13.1 Device Nomenclature
    2. 13.2 Related Links
    3. 13.3 Receiving Notification of Documentation Updates
    4. 13.4 Community Resources
    5. 13.5 Trademarks
    6. 13.6 Electrostatic Discharge Caution
    7. 13.7 Glossary
  14. 14Mechanical, Packaging, and Orderable Information

Package Options

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

Typical Characteristics

Data at high and low temperatures are applicable only within the recommended operating free-air temperature ranges of the various devices.

TL431 TL432 tc_1_1_lvs543.gifFigure 1. Reference Voltage vs Free-Air Temperature
TL431 TL432 tc_1_3_lvs543.gifFigure 3. Cathode Current vs Cathode Voltage
TL431 TL432 tc_2_1_lvs543.gifFigure 5. Off-State Cathode Current
vs Free-Air Temperature
TL431 TL432 tc_1_2_lvs543.gifFigure 2. Reference Current vs Free-Air Temperature
TL431 TL432 tc_1_4_lvs543.gifFigure 4. Cathode Current vs Cathode Voltage
TL431 TL432 tc_2_2_lvs543.gifFigure 6. Ratio of Delta Reference Voltage to Delta Cathode Voltage vs Free-Air Temperature
TL431 TL432 tc_2_3_lvs543.gifFigure 7. Equivalent Input Noise Voltage vs Frequency
TL431 TL432 tc_3_1_lvs543.gifFigure 8. Equivalent Input Noise Voltage Over a 10-S Period
TL431 TL432 tc_3_2_lvs543.gifFigure 9. Test Circuit for Equivalent Input Noise Voltage Over a 10-S Period
TL431 TL432 tc_4_1_lvs543.gifFigure 10. Small-Signal Voltage Amplification
vs Frequency
TL431 TL432 tc_4_3_lvs543.gifFigure 12. Reference Impedance vs Frequency
TL431 TL432 tc_5_1_lvs543.gifFigure 14. Pulse Response
TL431 TL432 tc_6_1_lvs543.gif
The areas under the curves represent conditions that may cause the device to oscillate. For curves B, C, and D, R2 and V+ are adjusted to establish the initial VKA and IKA conditions, with CL = 0. VBATT and CL then are adjusted to determine the ranges of stability.
Figure 16. Stability Boundary Conditions for All TL431 and TL431A Devices
(Except for SOT23-3, SC-70, and Q-Temp Devices)
TL431 TL432 tc_6_3_lvs543.gif
The areas under the curves represent conditions that may cause the device to oscillate. For curves B, C, and D, R2 and V+ are adjusted to establish the initial VKA and IKA conditions, with CL = 0. VBATT and CL then are adjusted to determine the ranges of stability.
Figure 18. Stability Boundary Conditions for All TL431B, TL432, SOT-23, SC-70, and Q-Temp Devices
TL431 TL432 tc_4_2_lvs543.gifFigure 11. Test Circuit for Voltage Amplification
TL431 TL432 tc_4_4_lvs543.gif
Figure 13. Test Circuit for Reference Impedance
TL431 TL432 tc_5_2_lvs543.gif
Figure 15. Test Circuit for Pulse Response
TL431 TL432 tc_6_2_lvs543.gifFigure 17. Test Circuits for Stability Boundary Conditions
TL431 TL432 tc_6_4_lvs543.gif
Figure 19. Test Circuit for Stability Boundary Conditions