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)
  • D|8
  • DBZ|3
  • DBV|5
  • PK|3
  • LP|3
Thermal pad, mechanical data (Package|Pins)
Orderable Information

Electrical Characteristics for TLV431A

at 25°C free-air temperature (unless otherwise noted)
PARAMETER TEST CONDITIONS TLV431A UNIT
MIN TYP MAX
VREF Reference voltage VKA = VREF,
IK = 10 mA
TA = 25°C 1.228 1.24 1.252 V
TA = full range(1)
(see Figure 22)
TLV431AC 1.221 1.259
TLV431AI 1.215 1.265
TLV431AQ 1.209 1.271
VREF(dev) VREF deviation over full temperature range(2) VKA = VREF, IK = 10 mA(1)
(see Figure 22)
TLV431AC 4 12 mV
TLV431AI 6 20
TLV431AQ 11 31
TLV431 TLV431A TLV431B Inline1_lvs139.gif Ratio of VREF change in cathode voltage change VKA = VREF to 6 V, IK = 10 mA
(see Figure 23)
–1.5 –2.7 mV/V
Iref Reference terminal current IK = 10 mA, R1 = 10 kΩ,
R2 = open
(see Figure 23)
0.15 0.5 µA
Iref(dev) Iref deviation over full temperature range(2) IK = 10 mA, R1 = 10 kΩ,
R2 = open(1) (see Figure 23)
TLV431AC 0.05 0.3 µA
TLV431AI 0.1 0.4
TLV431AQ 0.15 0.5
IK(min) Minimum cathode current for regulation VKA = VREF (see Figure 22) TLV431AC/AI 55 80 µA
TLV431AQ 55 100
IK(off) Off-state cathode current VREF = 0, VKA = 6 V (see Figure 24) 0.001 0.1 µA
|zKA| Dynamic impedance(3) VKA = VREF, f ≤ 1 kHz, IK = 0.1 mA to 15 mA
(see Figure 22)
0.25 0.4 Ω
Full temperature ranges are –40°C to 125°C for TLV431Q, –40°C to 85°C for TLV431I, and 0°C to 70°C for TLV431C.
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:
TLV431 TLV431A TLV431B 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.
The dynamic impedance is defined as TLV431 TLV431A TLV431B Inline_note3_lvs139.gif
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When the device is operating with two external resistors (see Figure 23), the total dynamic impedance of the circuit is defined as:
TLV431 TLV431A TLV431B Inline3a_lvs139.gif