SNVSB02C March   2020  – July 2021 TPS54JA20

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
      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
  9. Power Supply Recommendations
  10. 10Layout
    1. 10.1 Layout Guidelines
    2. 10.2 Layout Example
      1. 10.2.1 Thermal Performance On TI EVM
  11. 11Device and Documentation Support
    1. 11.1 Documentation Support
      1. 11.1.1 Related Documentation
    2. 11.2 Receiving Notification of Documentation Updates
    3. 11.3 Support Resources
    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

Application Curves

GUID-0173431E-5365-4D10-B30F-B04126EA2FB5-low.gifFigure 8-2 Efficiency vs Output Current, VCC = 3.3V External VCC Bias
GUID-15E2F105-8AAE-4E58-859D-5D664F77787A-low.gifFigure 8-4 Switching Frequency vs Output Current
GUID-72B89E52-B3B8-4F08-B45C-2F93B020200F-low.gifFigure 8-6 Switching Frequency vs Output Voltage
GUID-A8E45C67-FDCC-4C03-AA8F-481810E3ED2E-low.gifFigure 8-8 Output Voltage vs Output Current
GUID-978D165A-24EE-4E22-959F-0522F9B398FD-low.gifFigure 8-10 Output Voltage vs Output Current, VCC = 3.3V External Bias
GUID-5D78648B-6927-474F-ACCC-85441690DF5A-low.gifFigure 8-12 Output Voltage vs Input Voltage VCC = 3.3 V External Bias
GUID-766C776C-EFBA-4663-A13C-1E6442A9E272-low.pngFigure 8-14 Enable Start-Up, Full Load
GUID-C7D0FB30-257D-414E-8FEA-5AF93FADFBBE-low.pngFigure 8-16 Enable to Power Up Iout = 0.1 A
GUID-75E61E0E-BAF7-4242-871B-9266AA097304-low.pngFigure 8-18 Enable Start-Up, Prebias
GUID-1D25CBE3-DC28-4567-8268-B6B862E07607-low.pngFigure 8-20 Enable Power Up, Skip
GUID-93CF90CF-8CA8-4C55-BFE2-68123153B7CA-low.pngFigure 8-22 Enable Power Up into Pre-bias, Skip
GUID-C569EAF4-68C8-4951-82E4-C2F63B817CC9-low.pngFigure 8-24 FCCM Mode Load Transient
GUID-FCCAD830-E191-4B4C-B53F-6A6B909FC70C-low.pngFigure 8-26 Output Voltage Ripple
GUID-C55C3D21-4CF5-4EF5-A691-629CD4792BE7-low.pngFigure 8-28 Output Voltage Ripple
GUID-81B74FD2-2AD8-48FC-A879-DC41E3AF7F2E-low.pngFigure 8-30 Output Voltage Ripple, Skip
GUID-7243723C-4B64-4BB8-81C5-7A4E38C8ED65-low.pngFigure 8-32 Enable into Overcurrent
GUID-62F23ED7-E39E-4FE6-94BD-D1DF0E98F911-low.pngFigure 8-34 Over Temperature Protection in Skip
GUID-9EB9BB32-4465-4322-924E-319442517AF8-low.gifFigure 8-3 Efficiency vs Output Current, VCC = 3.3V External VCC Bias
GUID-6F3095AB-E15C-41E3-A9ED-9ACEEB4F1183-low.gifFigure 8-5 Switching Frequency vs Input Voltage
GUID-0C371DC9-52DF-4369-8F0A-CF148E53A6EE-low.gifFigure 8-7 Output Voltage vs Output Current
GUID-26BA6311-A789-4F15-9E41-48F2DE71D881-low.gifFigure 8-9 Output Voltage vs Output Current, VCC = 3.3V External Bias
GUID-F7F4F922-1332-427C-9D31-2882FB895C4A-low.gifFigure 8-11 Output Voltage vs Input Voltage VCC = Int
GUID-5B1644E5-B910-4B35-8D3A-4A736F5E7894-low.gifFigure 8-13 ICC Current vs External VCC Voltage
GUID-7FDF7723-C13B-4659-A04C-B4AB1372C161-low.pngFigure 8-15 Enable Power Down Full Load
GUID-136C9166-7FA4-4744-8FCC-A5A6FD6B2076-low.pngFigure 8-17 Enable to over Down Iout = 0 A
GUID-E44D6B4C-94C0-41D9-8594-A7EBC61EA687-low.pngFigure 8-19 Prebias Power Up
GUID-913DABDD-6E20-4EEA-B96A-4331FCE9A285-low.pngFigure 8-21 Enable Power Down, Skip
GUID-720A5300-559C-43FA-A00D-9C8960A88F04-low.pngFigure 8-23 Enable Power Down with Pre-bias, Skip
GUID-92518429-8E4C-41D5-9AD0-57F2A4966A49-low.pngFigure 8-25 Unload Transient
GUID-8D96633E-12F3-45D2-995A-6CB9D4A5C1A7-low.pngFigure 8-27 Output Voltage Ripple
GUID-6E33660C-CCEC-43F9-8BC1-6A435748406D-low.pngFigure 8-29 Output Voltage Ripple, Skip
GUID-5A46B701-48D7-4A0A-A0A5-314678DEC348-low.pngFigure 8-31 Over Current Protection
GUID-20DB3883-BBB2-4CB7-AC9D-EE1159B78B2A-low.pngFigure 8-33 Over Temperature Protection in FCCM
GUID-E0C92DA8-0FAB-46FD-A77A-108416217093-low.gifFigure 8-35 Frequency Response, 12-A Load