SNVSCR4 July   2024 TLA431

ADVANCE INFORMATION  

  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 Recommended Operating Conditions
    4. 6.4 Thermal Information
    5. 6.5 Electrical Characteristics
    6. 6.6 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 Closed Loop
      2. 8.4.2 Open Loop (Comparator)
  10. 9 Applications and Implementation
    1. 9.1 Application Information
    2. 9.2 Typical Applications
      1. 9.2.1 Shunt Regulator/Reference
        1. 9.2.1.1 Design Requirements
        2. 9.2.1.2 Detailed Design Procedure
          1. 9.2.1.2.1 Programming Output/Cathode Voltage
          2. 9.2.1.2.2 Total Accuracy
          3. 9.2.1.2.3 Stability
          4. 9.2.1.2.4 Start-Up Time
        3. 9.2.1.3 Application Curve
      2. 9.2.2 Comparator With Integrated Reference
        1. 9.2.2.1 Design Requirements
        2. 9.2.2.2 Detailed Design Procedure
          1. 9.2.2.2.1 Basic Operation
            1. 9.2.2.2.1.1 Overdrive
          2. 9.2.2.2.2 Output Voltage and Logic Input Level
            1. 9.2.2.2.2.1 Input Resistance
        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)

6.5 Electrical Characteristics

over recommended operating conditions, TA = 25°C (unless otherwise noted)
PARAMETER TEST CIRCUIT TEST CONDITIONS MIN TYP MAX UNIT
Vref Reference Voltage See Figure 7-1 VKA = Vref, IKA = 10mA TLA43xAx devices 2470 2495 2520 mV
VI(dev) Deviation of reference input voltage over full temperature range (1) See Figure 7-1 VKA = Vref, IKA = 10mA, –40°C < TJ < 85°C TLA43xxI devices 8 17 mV
VI(dev) Deviation of reference input voltage over full temperature range (1) See Figure 7-1 VKA = Vref, IKA = 10mA, –0°C < TJ < 90°C TLA43xxQ devices 5 13 mV
VI(dev) Deviation of reference input voltage over full temperature range (1) See Figure 7-1 VKA = Vref, IKA = 10mA, –40°C < TJ < 125°C TLA43xxQ devices 11 20 mV
ΔVref / ΔVKA Ratio of change in reference voltage to the change in cathode voltage See Figure 7-2 IKA = 10mA ΔVKA = 10V - Vref –1.4 –2.7 mV/V
ΔVKA = 36V - 10V –1 –2 mV/V
Iref Reference Input Current See Figure 7-2 IKA = 10mA, R1 = 10kΩ, R2 = ∞ 2 4 µA
II(dev) Deviation of reference input current over full temperature range (1) See Figure 7-2 IKA = 10mA, R1 = 10kΩ, R2 = ∞ 0.8 2.5 µA
Imin Minimum cathode current for regulation See Figure 7-1 VKA = Vref 0.15 0.2 mA
Ioff Off-state cathode current See Figure 7-3 VKA = 36V, Vref = 0 0.1 0.5 µA
|ZKA| Dynamic Impedance (2) See Figure 7-1 VKA = Vref, IKA = 1mA to 100mA 0.2 0.5 Ω
(1) The deviation parameters VI(dev) and II(dev) are defined as the differences between themAximum and minimum values obtained over the
rated temperature range. For more details on VI(dev) and how it relates to the average temperature coefficient, see Parameter Measurement Information.
(2) The dynamic impedance is defined by |ZKA| = ΔVKA/ΔIKA.  For more details on |ZKA| and how it relates to VKA, see Parameter Measurement Information.