SLVSDU6D July   2017  – November 2019 ATL431LI , ATL432LI

PRODUCTION DATA.  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
    1.     Device Images
      1.      Simplified Schematic
  4. 4 Revision History
  5. 5 Device Comparison Table
  6. 6 Pin Configuration and Functions
    1.     Pin Functions
  7. 7 Specifications
    1. 7.1 Absolute Maximum Ratings
    2. 7.2 ESD Ratings
    3. 7.3 Thermal Information
    4. 7.4 Recommended Operating Conditions
    5. 7.5 Electrical Characteristics
  8. 8 Typical Characteristics
  9. 9 Parameter Measurement Information
    1. 9.1 Temperature Coefficient
    2. 9.2 Dynamic Impedance
  10. 10Detailed Description
    1. 10.1 Overview
    2. 10.2 Functional Block Diagram
    3. 10.3 Feature Description
    4. 10.4 Device Functional Modes
      1. 10.4.1 Open Loop (Comparator)
      2. 10.4.2 Closed Loop
  11. 11Applications and Implementation
    1. 11.1 Application Information
    2. 11.2 Typical Applications
      1. 11.2.1 Comparator With Integrated Reference
        1. 11.2.1.1 Design Requirements
        2. 11.2.1.2 Detailed Design Procedure
          1. 11.2.1.2.1 Basic Operation
            1. 11.2.1.2.1.1 Overdrive
          2. 11.2.1.2.2 Output Voltage and Logic Input Level
            1. 11.2.1.2.2.1 Input Resistance
        3. 11.2.1.3 Application Curve
      2. 11.2.2 Precision Constant Current Sink
        1. 11.2.2.1 Design Requirements
        2. 11.2.2.2 Detailed Design Procedure
          1. 11.2.2.2.1 Basic Operation
            1. 11.2.2.2.1.1 Output Current Range and Accuracy
          2. 11.2.2.2.2 Power Consumption
      3. 11.2.3 Shunt Regulator/Reference
        1. 11.2.3.1 Design Requirements
        2. 11.2.3.2 Detailed Design Procedure
          1. 11.2.3.2.1 Programming Output/Cathode Voltage
          2. 11.2.3.2.2 Total Accuracy
          3. 11.2.3.2.3 Stability
          4. 11.2.3.2.4 Start-Up Time
        3. 11.2.3.3 Application Curve
      4. 11.2.4 Isolated Flyback with Optocoupler
        1. 11.2.4.1 Design Requirements
          1. 11.2.4.1.1 Detailed Design Procedure
            1. 11.2.4.1.1.1 ATL431LI Biasing
            2. 11.2.4.1.1.2 Resistor Feedback Network
    3. 11.3 System Examples
  12. 12Power Supply Recommendations
  13. 13Layout
    1. 13.1 Layout Guidelines
    2. 13.2 SOT23-3 Layout Example
    3. 13.3 X2SON (DQN) Layout Example
    4. 13.4 Thermal Considerations
  14. 14Device and Documentation Support
    1. 14.1 Documentation Support
      1. 14.1.1 Device Nomenclature
      2. 14.1.2 Related Documentation
    2. 14.2 Related Links
    3. 14.3 Receiving Notification of Documentation Updates
    4. 14.4 Community Resources
    5. 14.5 Trademarks
    6. 14.6 Electrostatic Discharge Caution
    7. 14.7 Glossary
  15. 15Mechanical, Packaging, and Orderable Information

Package Options

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

11.3 System Examples

ATL431LI ATL432LI ai_prec_hi_curr_ser_slvsdu6.gif
A. R should provide cathode current ≥ 0.08 mA to the ATL431LI at minimum V(BATT).
Figure 30. Precision High-Current Series Regulator
ATL431LI ATL432LI ai_out_ctrl_3term_slvsdu6.gifFigure 31. Output Control of a Three-Terminal Fixed Regulator
ATL431LI ATL432LI ai_high_curr_shunt_slvsdu6.gifFigure 32. High-Current Shunt Regulator
ATL431LI ATL432LI ai_crowbar_slvsdu6.gif
A. Refer to the stability boundary conditions in and Figure 13 to determine allowable values for C.
Figure 33. Crowbar Circuit
ATL431LI ATL432LI ai_prec_5v_1p5a_reg_slvsdu6.gifFigure 34. Precision 5-V, 1.5-A Regulator
ATL431LI ATL432LI ai_efficient_5v_slvsdu6.gif
A. Rb should provide cathode current ≥0.08 mA to the ATL431LI.
Figure 35. Efficient 5-V Precision Regulator
ATL431LI ATL432LI ai_pwm_conv_slvsdu6.gifFigure 36. PWM Converter With Reference
ATL431LI ATL432LI ai_voltage_monitor_slvsdu6.gif
A. Select R3 and R4 to provide the desired LED intensity and cathode current ≥ 0.08 mA to the ATL431LI at the available VI(BATT).
Figure 37. Voltage Monitor
ATL431LI ATL432LI ai_delay_timer_slvsdu6.gifFigure 38. Delay Timer
ATL431LI ATL432LI ai_prec_curr_limit_slvsdu6.gifFigure 39. Precision Current Limiter
ATL431LI ATL432LI ai_prec_const_curr_slvsdu6.gifFigure 40. Precision Constant-Current Sink