SNVS528H October   2007  – January 2016 LM20143 , LM20143-Q1

PRODUCTION DATA.  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
  4. 4 Revision History
  5. 5 Pin Configuration and 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 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1 Peak Current Mode Control
      2. 7.3.2 Precision Enable
      3. 7.3.3 Current Limit
      4. 7.3.4 Pre-Bias Start Up Capability
      5. 7.3.5 Soft-Start and Voltage Tracking
      6. 7.3.6 Power Good and Overvoltage Fault Handling
      7. 7.3.7 UVLO
      8. 7.3.8 Thermal Protection
    4. 7.4 Device Functional Modes
      1. 7.4.1 Light Load Operation
      2. 7.4.2 Tracking an External Supply
      3. 7.4.3 Using Precision Enable and Power Good
  8. 8 Application and Implementation
    1. 8.1 Application Information
    2. 8.2 Typical Applications
      1. 8.2.1 3.3-V or 5-V Supply Rail Design
        1. 8.2.1.1 Design Requirements
        2. 8.2.1.2 Detailed Design Procedure
          1. 8.2.1.2.1  Duty Cycle Calculation
          2. 8.2.1.2.2  Inductor Selection (L)
          3. 8.2.1.2.3  Output Capacitor Selection (COUT)
          4. 8.2.1.2.4  Input Capacitor Selection (CIN)
          5. 8.2.1.2.5  Setting the Output Voltage (RFB1, RFB2)
          6. 8.2.1.2.6  Adjusting the Operating Frequency (RT)
          7. 8.2.1.2.7  AVIN Filtering Components (CF and RF)
          8. 8.2.1.2.8  Sub-Regulator Bypass Capacitor (CVCC)
          9. 8.2.1.2.9  Setting the Start Up Time (CSS)
          10. 8.2.1.2.10 Loop Compensation (RC1, CC1)
        3. 8.2.1.3 Application Curves
      2. 8.2.2 5-V Supply Rail Design
        1. 8.2.2.1 Design Requirements
        2. 8.2.2.2 Detailed Design Procedure
      3. 8.2.3 3-V Supply Rail Design
        1. 8.2.3.1 Design Requirements
        2. 8.2.3.2 Detailed Design Procedure
  9. 9 Power Supply Recommendations
  10. 10Layout
    1. 10.1 Layout Guidelines
    2. 10.2 Layout Example
    3. 10.3 Thermal Considerations
  11. 11Device and Documentation Support
    1. 11.1 Device Support
      1. 11.1.1 Third-Party Products Disclaimer
      2. 11.1.2 Development Support
    2. 11.2 Documentation Support
      1. 11.2.1 Related Documentation
    3. 11.3 Related Links
    4. 11.4 Trademarks
    5. 11.5 Electrostatic Discharge Caution
    6. 11.6 Glossary
  12. 12Mechanical, Packaging, and Orderable Information

Package Options

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

4 Revision History

Changes from G Revision (March 2013) to H Revision

  • Added ESD Ratings table, Feature Descriptionsection, Device Functional Modes, Application and Implementation section, Power Supply Recommendations section, Layout section, Device and Documentation Support section, and Mechanical, Packaging, and Orderable Information section.Go

Changes from F Revision (March 2013) to G Revision

  • Changed layout of National Data Sheet to TI formatGo