SNVSBC5A December   2020  – December 2022 TPS548B28

PRODUCTION DATA  

  1. Features
  2. Applications
  3. Description
  4. Revision History
  5. Pin Configuration and 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
    6. 6.6 Typical Characteristics
  7. Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1  Internal VCC LDO And Using External Bias On VCC Pin
      2. 7.3.2  Enable
      3. 7.3.3  Output Voltage Setting
        1. 7.3.3.1 Remote Sense
      4. 7.3.4  Internal Fixed Soft Start and External Adjustable Soft Start
      5. 7.3.5  External REFIN For Output Voltage Tracking
      6. 7.3.6  Frequency and Operation Mode Selection
      7. 7.3.7  D-CAP3™ Control Mode
      8. 7.3.8  Low-side FET Zero-Crossing
      9. 7.3.9  Current Sense and Positive Overcurrent Protection
      10. 7.3.10 Low-side FET Negative Current Limit
      11. 7.3.11 Power Good
      12. 7.3.12 Overvoltage and Undervoltage Protection
      13. 7.3.13 Out-Of-Bounds (OOB) Operation
      14. 7.3.14 Output Voltage Discharge
      15. 7.3.15 UVLO Protection
      16. 7.3.16 Thermal Shutdown
    4. 7.4 Device Functional Modes
      1. 7.4.1 Auto-Skip Eco-mode™ Light Load Operation
      2. 7.4.2 Forced Continuous-Conduction Mode
      3. 7.4.3 Powering the Device From a 12-V Bus
      4. 7.4.4 Powering the Device From a 3.3-V Bus
      5. 7.4.5 Powering the Device From a Split-rail Configuration
  8. Application and Implementation
    1. 8.1 Application Information
    2. 8.2 Typical Application
      1. 8.2.1 Design Requirements
      2. 8.2.2 Detailed Design Procedure
        1. 8.2.2.1  Output Voltage Setting Point
        2. 8.2.2.2  Choose the Switching Frequency and the Operation Mode
        3. 8.2.2.3  Choose the Inductor
        4. 8.2.2.4  Set the Current Limit (TRIP)
        5. 8.2.2.5  Choose the Output Capacitor
        6. 8.2.2.6  Choose the Input Capacitors (CIN)
        7. 8.2.2.7  Soft Start Capacitor (SS/REFIN Pin)
        8. 8.2.2.8  EN Pin Resistor Divider
        9. 8.2.2.9  VCC Bypass Capacitor
        10. 8.2.2.10 BOOT Capacitor
        11. 8.2.2.11 PGOOD Pullup Resistor
      3. 8.2.3 Application Curves
    3. 8.3 Power Supply Recommendations
    4. 8.4 Layout
      1. 8.4.1 Layout Guidelines
      2. 8.4.2 Layout Example
        1. 8.4.2.1 Thermal Performance On TI EVM
  9. Device and Documentation Support
    1. 9.1 Documentation Support
      1. 9.1.1 Related Documentation
    2. 9.2 Receiving Notification of Documentation Updates
    3. 9.3 Support Resources
    4. 9.4 Trademarks
    5. 9.5 Electrostatic Discharge Caution
    6. 9.6 Glossary
  10. 10Mechanical, Packaging, and Orderable Information

Package Options

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

Application Curves

GUID-67D79F8C-07F3-4E4C-849A-69B31BBABB78-low.gifFigure 8-2 Efficiency vs Output Current, Internal VCC Bias
GUID-8F573313-FD9A-449E-AA5F-AA051B2EC2D4-low.gifFigure 8-4 Efficiency vs Output Current, VCC = 3.3V External VCC Bias
GUID-8C8F9FF6-0F36-4C79-BA76-76DB457D44D7-low.gifFigure 8-6 Switching Frequency vs Input Voltage
GUID-4CE85EB0-C130-4F13-8008-7E12102DBDB9-low.gifFigure 8-8 Output Voltage vs Output Current
GUID-3741B221-B518-4E67-B59F-0D386F42603E-low.gifFigure 8-10 Output Voltage vs Output Current, VCC = 3.3-V External Bias
GUID-5CD5D30B-6461-40F9-9719-7492F75EF612-low.gifFigure 8-12 Output Voltage vs Input Voltage VCC = 3.3-V External Bias
GUID-644678AA-9557-40EB-AE33-1989F48D0743-low.pngFigure 8-14 Enable Start-Up, Prebias
GUID-A1799E16-ECFD-483C-932F-5D15DA73729E-low.pngFigure 8-16 Enable Power Up, Skip
GUID-56EC756F-EEDD-4461-B96D-99B8B4ACBA73-low.pngFigure 8-18 Enable Power Up into Pre-bias, Skip
GUID-01F2D6A0-9291-4EB7-ADA5-B7D120EB98CC-low.pngFigure 8-20 Load Transient
GUID-BB364563-9464-49ED-A0DC-D00889E598CC-low.pngFigure 8-22 Output Voltage Ripple
GUID-7AD4EBB7-70EC-4B11-9C1D-48177ACA9C2C-low.pngFigure 8-24 Output Voltage Ripple
GUID-99495E59-3E46-4B94-8B22-52E3DF5CD2C0-low.pngFigure 8-26 Output Voltage Ripple, Skip
GUID-6B7371F9-24FF-4CCC-87FE-899F05B6AF7C-low.pngFigure 8-28 Exiting Overtemperature Protection in FCCM
GUID-F69BFEF0-9A84-46DA-8583-99FD0D45D87C-low.pngFigure 8-30 Hiccup Overcurrent
GUID-1FDB94A1-43FF-4A1B-B407-1593E9BF0061-low.gifFigure 8-3 Efficiency vs Output Current, Internal VCC Bias
GUID-88464917-CD10-4BD9-8317-30905F6E017C-low.gifFigure 8-5 Switching Frequency vs Output Current
GUID-1E1830C7-89B5-4C91-BEB5-19C65196F1BE-low.gifFigure 8-7 Output Voltage vs Output Current
GUID-A5CA4512-8828-433B-96DB-935F4614EFDB-low.gifFigure 8-9 Output Voltage vs Output Current, VCC = 3.3-V External Bias
GUID-1A6BBF44-2CE7-4000-BD5A-E04A8BFB52C9-low.gifFigure 8-11 Output Voltage vs Input Voltage VCC = Int
GUID-F286722B-6E77-4046-8459-5DEDA8E85634-low.gifFigure 8-13 ICC Current vs External VCC Voltage
GUID-B7CEC9FB-E401-48DB-9918-93F584A158AD-low.pngFigure 8-15 Prebias Power-Down
GUID-1957CB60-4832-49BF-B6E5-7DFE4A1C89D8-low.pngFigure 8-17 Enable Power Down, Skip
GUID-E0A6DBCC-79A5-488A-92C9-A1839D04F406-low.pngFigure 8-19 Enable Power Down with Pre-bias, Skip
GUID-9469044C-27F0-4825-BBFD-81E8E45AB534-low.pngFigure 8-21 Unload Transient
GUID-904BB925-57CA-48D1-ADFA-3DF4E11F4B3E-low.pngFigure 8-23 Output Voltage Ripple
GUID-02D3FBA6-F0C7-4681-9A28-100687F670AE-low.pngFigure 8-25 Output Voltage Ripple, Skip
GUID-334E1686-294F-4FE6-8925-4582251AC587-low.pngFigure 8-27 Over Temperature Protection in FCCM
GUID-CACF0BA1-8F44-4F85-AC44-64D9548A7C38-low.pngFigure 8-29 Enabled into Overcurrent