SLVSFF4 December   2019 TLVH431B-EP

PRODUCTION DATA.  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
    1.     Device Images
      1.      Simplified Schematic
  4. 4 Revision History
  5. 5 Pin Configuration and Functions
    1.     Pin Functions
  6. 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
  7. 7 Parameter Measurement Information
  8. 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. 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 Receiving Notification of Documentation Updates
    3. 12.3 Support Resources
    4. 12.4 Trademarks
    5. 12.5 Electrostatic Discharge Caution
    6. 12.6 Glossary
  13. 13Mechanical, Packaging, and Orderable Information

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6.5 Electrical Characteristics

at –55°C to 125°C free-air temperature (unless otherwise noted)
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
VREF Reference voltage VKA = VREF,
IK = 10 mA, see Figure 23 		TA = 25°C 1.234 1.24 1.246 V
TA = full range(1) 1.221 1.265
VREF(dev) VREF deviation(2) VKA = VREF, IK = 10 mA, see Figure 23 11 31 mV
TLVH431B-EP dvref_dvka_lvs555.gif Ratio of VREF change to
cathode voltage change		 IK = 10 mA, VK = VREF to 18 V, see Figure 24 TA = 25°C –1.5 –2.7 mV/V
Iref Reference terminal current IK = 10 mA, R1 = 10 kΩ, R2 = open, see Figure 24 TA = 25°C 0.1 0.5 μA
Iref(dev) Iref deviation(2) IK = 10 mA, R1 = 10 kΩ, R2 = open,
see Figure 24(1) 		0.15 0.5 μA
IK(min) Minimum cathode current for regulation VKA = VREF, see Figure 23 TA = 25°C 60 100 μA
TA = full range(1) 200
IK(off) Off-state cathode current VREF = 0, VKA = 18 V,
see Figure 25 		TA = 25°C 0.02 0.1 μA
TA = full range(1) 0.7
|zKA| Dynamic impedance(3) VKA = VREF, f ≤ 1 kHz, IK = 0.2 mA to 70 mA, see Figure 23 TA = 25°C 0.25 0.4 Ω
(1) Full temperature range is –55°C to 125°C.
(2) The deviation parameters VREF(dev) and Iref(dev) are defined as the differences between the maximum and minimum values obtained over the rated temperature range. The average full-range temperature coefficient of the reference input voltage, αVREF, is defined as:
TLVH431B-EP EQ_note2_lvs139.gif
where ΔTA is the rated operating free-air temperature range of the device.
αVREF can be positive or negative, depending on whether minimum VREF or maximum VREF, respectively, occurs at the lower temperature.
(3) The dynamic impedance is defined as:
TLVH431B-EP Inline_note3_lvs139.gif
When the device is operating with two external resistors (see Figure 24), the total dynamic impedance of the circuit is defined as:
TLVH431B-EP Inline3a_lvs139.gif
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