SGLS302G March   2005  – May 2020 TL431-Q1 , TL432-Q1

PRODUCTION DATA.  

  1. Features
  2. Applications
  3. Description
    1.     Device Images
      1.      Simplified Schematic
  4. Revision History
  5. Pin Configuration and Functions
    1.     Pin Functions
  6. Specifications
    1. 6.1 Absolute Maximum Ratings
    2. 6.2 ESD Ratings
    3. 6.3 Recommended Operating Conditions
    4. 6.4 Thermal Information
    5. 6.5 Electrical Characteristics: TL43x-Q1
    6. 6.6 Electrical Characteristics: TL43xA-Q1
    7. 6.7 Electrical Characteristics: TL43xB-Q1
    8. 6.8 Typical Characteristics
  7. Parameter Measurement Information
  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
  9. Application and Implementation
    1. 9.1 Application Information
    2. 9.2 Typical Applications
      1. 9.2.1 Comparator Application
        1. 9.2.1.1 Design Requirements
        2. 9.2.1.2 Detailed Design Procedure
          1. 9.2.1.2.1 Basic Operation
          2. 9.2.1.2.2 Overdrive
          3. 9.2.1.2.3 Output Voltage and Logic Input Level
          4. 9.2.1.2.4 Input Resistance
          5. 9.2.1.2.5 Deviation Parameters and Calculating Dynamic Impedance
        3. 9.2.1.3 Application Curve
      2. 9.2.2 Other Application Circuits
  10. 10Power Supply Recommendations
  11. 11Layout
    1. 11.1 Layout Guidelines
    2. 11.2 Layout Example
  12. 12Device and Documentation Support
    1. 12.1 Documentation Support
      1. 12.1.1 Related Documentation
    2. 12.2 Related Links
    3. 12.3 Receiving Notification of Documentation Updates
    4. 12.4 Community Resources
    5. 12.5 Trademarks
    6. 12.6 Electrostatic Discharge Caution
    7. 12.7 Glossary
  13. 13Mechanical, Packaging, and Orderable Information

Package Options

Refer to the PDF data sheet for device specific package drawings

Mechanical Data (Package|Pins)
  • DBZ|3
Thermal pad, mechanical data (Package|Pins)
Orderable Information

Typical Characteristics

TL431-Q1 TL432-Q1 D001_SGLS302.gif
Data is for devices having the indicated value of VREF at IKA = 10 mA, TA = 25°C.
Figure 1. Reference Voltage vs Free-air Temperature
TL431-Q1 TL432-Q1 D003_SGLS302.gifFigure 3. Cathode Current vs Cathode Voltage
TL431-Q1 TL432-Q1 D005_SGLS302.gifFigure 5. OFF-State Cathode Current vs
Free-air Temperature
TL431-Q1 TL432-Q1 D007_SGLS302.gifFigure 7. Equivalent Input Noise Voltage vs Frequency
TL431-Q1 TL432-Q1 D009_SGLS302.gifFigure 9. Small-Signal Voltage Amplification vs Frequency
TL431-Q1 TL432-Q1 D011_SGLS302.gif
Figure 11. Pulse Response
TL431-Q1 TL432-Q1 D013_SGLS302.gif
The areas under the curves represent conditions that may cause the device to oscillate. For curves B, C, and D, R2 and VREF were adjusted to establish the initial VKA and IKA conditions with CL = 0. VBATT and CL then were adjusted to determine the ranges of stability (see Figure 18 and Figure 19 for test circuits).
Figure 13. Stability Boundary Conditions for All TL43x, SOT-23, SC-70, and Q-TEMP Devices
TL431-Q1 TL432-Q1 D002_SGLS302.gif
Figure 2. Reference Current vs Free-air Temperature
TL431-Q1 TL432-Q1 D004_SGLS302.gifFigure 4. Cathode Current vs Cathode Voltage
TL431-Q1 TL432-Q1 D006_SGLS302.gifFigure 6. Ratio of Delta Reference Voltage to Delta Cathode Voltage vs Free-air Temperature
TL431-Q1 TL432-Q1 D008_SGLS302.gifFigure 8. Equivalent Input Noise Voltage Over a 10-s Period
TL431-Q1 TL432-Q1 D010_SGLS302.gifFigure 10. Reference Impedance vs Frequency
TL431-Q1 TL432-Q1 D012_SGLS302.gif
The areas under the curves represent conditions that may cause the device to oscillate. For curves B, C, and D, R2 and VREF were adjusted to establish the initial VKA and IKA conditions with CL = 0. VBATT and CL then were adjusted to determine the ranges of stability (see Figure 18 and Figure 19 for test circuits).
Figure 12. Stability Boundary Conditions for All TL43x Devices (Except for SOT23-3, SC-70,
and Q-TEMP Devices)