SLUS774C AUGUST   2007  – December 2014 TPS54383 , TPS54386

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  Voltage Reference
      2. 7.3.2  Oscillator
      3. 7.3.3  Input Undervoltage Lockout (UVLO) and Startup
      4. 7.3.4  Enable and Timed Turn On of the Outputs
      5. 7.3.5  Output Voltage Sequencing
      6. 7.3.6  Soft-Start
      7. 7.3.7  Output Voltage Regulation
      8. 7.3.8  Feedback Loop and Inductor-Capacitor (L-C) Filter Selection
      9. 7.3.9  Inductor-Capacitor (L-C) Selection
      10. 7.3.10 Maximum Output Capacitance
      11. 7.3.11 Minimum Output Capacitance
      12. 7.3.12 Modifying The Feedback Loop
        1. 7.3.12.1 Using High-ESR Output Capacitors
        2. 7.3.12.2 Using All Ceramic Output Capacitors
      13. 7.3.13 Example: TPS54386 Buck Converter Operating at 12-V Input, 3.3-V Output and 400-mA(P-P) Ripple Current
      14. 7.3.14 Bootstrap for the N-Channel MOSFET
      15. 7.3.15 Light Load Operation
      16. 7.3.16 SW Node Ringing
        1. 7.3.16.1 SW Node Snubber
        2. 7.3.16.2 Bootstrap Resistor
      17. 7.3.17 Output Overload Protection
      18. 7.3.18 Operating Near Maximum Duty Cycle
      19. 7.3.19 Dual Supply Operation
      20. 7.3.20 Cascading Supply Operation
      21. 7.3.21 Multiphase Operation
      22. 7.3.22 Bypass and FIltering
      23. 7.3.23 Overtemperature Protection and Junction Temperature Rise
      24. 7.3.24 Power Derating
    4. 7.4 Device Functional Modes
      1. 7.4.1 Minimum Input Voltage
      2. 7.4.2 ENx Control
  8. 8 Applications and Implementation
    1. 8.1 Application Information
    2. 8.2 Typical Applications
      1. 8.2.1 12-V to 5-V and 3.3-V Converter
        1. 8.2.1.1 Design Requirements
        2. 8.2.1.2 Detailed Design Procedure
          1. 8.2.1.2.1  Duty Cycle Estimation
          2. 8.2.1.2.2  Inductor Selection
          3. 8.2.1.2.3  Rectifier Diode Selection
          4. 8.2.1.2.4  Output Capacitor Selection
          5. 8.2.1.2.5  Voltage Setting
          6. 8.2.1.2.6  Compensation Capacitors
          7. 8.2.1.2.7  Input Capacitor Selection
          8. 8.2.1.2.8  Boot Strap Capacitor
          9. 8.2.1.2.9  ILIM
          10. 8.2.1.2.10 SEQ
          11. 8.2.1.2.11 Power Dissipation
        3. 8.2.1.3 Application Curves
      2. 8.2.2 24-V to 12-V and 24-V to 5-V
        1. 8.2.2.1 Design Requirements
        2. 8.2.2.2 Detailed Design Procedure
        3. 8.2.2.3 Application Curves
      3. 8.2.3 5-V to 3.3V and 5-V to 1.2 V
        1. 8.2.3.1 Design Requirements
        2. 8.2.3.2 Detailed Design Procedure
        3. 8.2.3.3 Application Curves
  9. 9 Power Supply Recommendations
  10. 10Layout
    1. 10.1 Layout Guidelines
    2. 10.2 Layout Example
    3. 10.3 PowerPAD Package
  11. 11Device and Documentation Support
    1. 11.1 Device Support
      1. 11.1.1 Definition of Symbols
    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

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12 Mechanical, Packaging, and Orderable Information

The following pages include mechanical, packaging, and orderable information. This information is the most current data available for the designated devices. This data is subject to change without notice and revision of this document. For browser-based versions of this data sheet, refer to the left-hand navigation.