SLVS139X July   1996  – May 2018 TLV431 , TLV431A , TLV431B

PRODUCTION DATA.  

  1. Features
  2. Applications
  3. Description
    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 for TLV431
    6. 6.6 Electrical Characteristics for TLV431A
    7. 6.7 Electrical Characteristics for TLV431B
    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. Applications and Implementation
    1. 9.1 Application Information
    2. 9.2 Typical Applications
      1. 9.2.1 Comparator With Integrated Reference (Open Loop)
        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
            1. 9.2.1.2.3.1 Input Resistance
        3. 9.2.1.3 Application Curves
      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
        3. 9.2.2.3 Application Curve
  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
  • DBV|5
  • PK|3
  • LP|3
Thermal pad, mechanical data (Package|Pins)
Orderable Information

Typical Characteristics

Operation of the device at these or any other conditions beyond those indicated in the Recommended Operating Conditions table are not implied.
TLV431 TLV431A TLV431B tc1_lvs139.gifFigure 1. Reference Voltage vs
Junction Temperature
TLV431 TLV431A TLV431B tc3_lvs139.gifFigure 3. Reference Input Current vs
Junction Temperature (for TLV431B)
TLV431 TLV431A TLV431B D009_tlz431.gifFigure 5. Minimum Cathode Current vs Temperature
TLV431 TLV431A TLV431B tc6_lvs139.gifFigure 7. Off-State Cathode Current vs
Junction Temperature (for TLV431 and TLV431A)
TLV431 TLV431A TLV431B tc8_lvs139.gifFigure 9. Ratio of Delta Reference Voltage to
Delta Cathode Voltage vs
Junction Temperature (for TLV431 and TLV431A)
TLV431 TLV431A TLV431B tc10_lvs139.gif
Extrapolated from life-test data taken at 125°C; the activation energy assumed is 0.7 eV.
Figure 11. Percentage Change in VREF vs
Operating Life at 55°C
TLV431 TLV431A TLV431B tc2_lvs139.gifFigure 2. Reference Input Current vs
Junction Temperature (for TLV431 and TLV431A)
TLV431 TLV431A TLV431B tc4_lvs139.gifFigure 4. Cathode Current vs
Cathode Voltage
TLV431 TLV431A TLV431B tc5_lvs139.gifFigure 6. Cathode Current vs
Cathode Voltage
TLV431 TLV431A TLV431B tc7_lvs139.gifFigure 8. Off-State Cathode Current vs
Junction Temperature (for TLV431B)
TLV431 TLV431A TLV431B tc9_lvs139.gifFigure 10. Ratio of Delta Reference Voltage to
Delta Cathode Voltage vs
Junction Temperature (for TLV431B)
TLV431 TLV431A TLV431B tc11_lvs139.gifFigure 12. Equivalent Input Noise Voltage
TLV431 TLV431A TLV431B tc12_lvs139.gifFigure 13. Equivalent Noise Voltage
over a 10-s Period
TLV431 TLV431A TLV431B tc13_lvs139.gifFigure 14. Voltage Gain and Phase Margin
TLV431 TLV431A TLV431B tc14_lvs139.gifFigure 15. Reference Impedance vs Frequency
TLV431 TLV431A TLV431B tc15_lvs139.gifFigure 16. Pulse Response 1
TLV431 TLV431A TLV431B tc16_lvs139.gifFigure 17. Pulse Response 2
TLV431 TLV431A TLV431B Stability2.gif
The areas under the curves represent conditions that may cause the device to oscillate. For VKA = 2-V and 3-V curves, R2 and Vbat were adjusted to establish the initial VKA and IK conditions with CL = 0. Vbat and CL then were adjusted to determine the ranges of stability.
Figure 18. Stability Boundary Conditions
TLV431 TLV431A TLV431B g_phase_capload_vk1p25_new_lvs555.gifFigure 19. Phase Margin vs Capacitive Load
VKA = VREF (1.25 V), TA= 25°C
TLV431 TLV431A TLV431B g_phase_capload_vk2p5_new_lvs555.gifFigure 20. Phase Margin vs Capacitive Load
VKA = 2.50 V, TA= 25°C
TLV431 TLV431A TLV431B g_phase_capload_vk5_new_lvs555.gifFigure 21. Phase Margin vs Capacitive Load
VKA = 5.00 V, TA= 25°C