SLVS905B December   2008  – July 2024 TLV431A-Q1 , TLV431B-Q1

PRODUCTION DATA  

  1.   1
  2. 1 Features
  3. 2 Applications
  4. 3 Description
  5. 4 Pin Configuration and Functions
    1.     Pin Functions
  6. 5 Specifications
    1. 5.1 Absolute Maximum Ratings
    2. 5.2 ESD Ratings
    3. 5.3 Thermal Information
    4. 5.4 Recommended Operating Conditions
    5. 5.5 Electrical Characteristics for TLV431A-Q1
    6. 5.6 Electrical Characteristics for TLV431B-Q1
    7. 5.7 Typical Characteristics
  7. 6 Parameter Measurement Information
  8. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
    4. 7.4 Device Functional Modes
      1. 7.4.1 Open Loop (Comparator)
      2. 7.4.2 Closed Loop
  9. 8 Applications and Implementation
    1. 8.1 Application Information
    2. 8.2 Typical Applications
      1. 8.2.1 Comparator with Integrated Reference (Open Loop)
        1. 8.2.1.1 Design Requirements
        2. 8.2.1.2 Detailed Design Procedure
          1. 8.2.1.2.1 Basic Operation
          2. 8.2.1.2.2 Overdrive
          3. 8.2.1.2.3 Output Voltage and Logic Input Level
            1. 8.2.1.2.3.1 Input Resistance
        3. 8.2.1.3 Application Curves
      2. 8.2.2 Shunt Regulator/Reference
        1. 8.2.2.1 Design Requirements
        2. 8.2.2.2 Detailed Design Procedure
          1. 8.2.2.2.1 Programming Output/Cathode Voltage
          2. 8.2.2.2.2 Total Accuracy
          3. 8.2.2.2.3 Stability
        3. 8.2.2.3 Application Curve
    3. 8.3 Power Supply Recommendations
    4. 8.4 Layout
      1. 8.4.1 Layout Guidelines
      2. 8.4.2 Layout Example
  10. 9 Device and Documentation Support
    1. 9.1 Receiving Notification of Documentation Updates
    2. 9.2 Support Resources
    3. 9.3 Trademarks
    4. 9.4 Electrostatic Discharge Caution
    5. 9.5 Glossary
  11. 10Revision History
  12. 11Mechanical, Packaging, and Orderable Information

Package Options

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

5.5 Electrical Characteristics for TLV431A-Q1

at 25°C free-air temperature (unless otherwise noted)
PARAMETERTEST CONDITIONSTLV431AQUNIT
MINTYPMAX
VREFReference voltageVKA = VREF,
IK = 10mA		TA = 25°C1.2281.241.252V
TA = full range(1)
(see Figure 6-1)		1.2091.271
VREF(dev)VREF deviation over full temperature range(2)VKA = VREF, IK = 10mA(1)
(see Figure 6-1)		1131mV
TLV431A-Q1 TLV431B-Q1 Ratio of VREF change in cathode voltage changeVKA = VREF to 6V, IK = 10mA
(see Figure 6-2)		–1.5–2.7mV/V
IrefReference terminal currentIK = 10mA, R1 = 10kΩ,
R2 = open
(see Figure 6-2)		0.150.5µA
Iref(dev)Iref deviation over full temperature range(2)IK = 10mA, R1 = 10kΩ,
R2 = open(1) (see Figure 6-2)		0.150.5µA
IK(min)Minimum cathode current for regulationVKA = VREF (see Figure 6-1)55100µA
IK(off)Off-state cathode currentVREF = 0, VKA = 6V (see Figure 6-3)0.0010.1µA
|zKA|Dynamic impedance(3)VKA = VREF, f ≤ 1kHz, IK = 0.1mA to 15mA
(see Figure 6-1)		0.250.4Ω
(1) Full temperature range is –40°C to 125°C for TLV431x-Q1.
(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:
TLV431A-Q1 TLV431B-Q1
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 TLV431A-Q1 TLV431B-Q1

When the device is operating with two external resistors (see Figure 6-2), the total dynamic impedance of the circuit is defined as:
TLV431A-Q1 TLV431B-Q1