SLUSAK2D August   2011  – April 2021 TPS53353

PRODUCTION DATA  

  1. Features
  2. Applications
  3. Description
  4. Revision History
  5. Pin Configuration and Functions
  6. Specifications
    1. 6.1 Absolute Maximum Ratings (1)
    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 5-V LDO and VREG Start-Up
      2. 7.3.2 Adaptive On-Time D-CAP™ Control and Frequency Selection
      3. 7.3.3 Ramp Signal
      4. 7.3.4 Adaptive Zero Crossing
      5. 7.3.5 Power-Good
      6. 7.3.6 Current Sense, Overcurrent and Short Circuit Protection
      7. 7.3.7 Overvoltage and Undervoltage Protection
      8. 7.3.8 UVLO Protection
      9. 7.3.9 Thermal Shutdown
    4. 7.4 Device Functional Modes
      1. 7.4.1 Small Signal Model
      2. 7.4.2 Enable, Soft Start, and Mode Selection
      3. 7.4.3 Auto-Skip Eco-mode™ Light Load Operation
      4. 7.4.4 Forced Continuous Conduction Mode
  8. Application and Implementation
    1. 8.1 Application Information
    2. 8.2 Typical Applications
      1. 8.2.1 Typical Application Circuit Diagram
        1. 8.2.1.1 Design Requirements
        2. 8.2.1.2 Detailed Design Procedure
          1. 8.2.1.2.1 External Component Selection
        3. 8.2.1.3 Application Curves
      2. 8.2.2 Typical Application Circuit Diagram With Ceramic Output Capacitors
        1. 8.2.2.1 Design Requirements
        2. 8.2.2.2 Detailed Design Procedure
          1. 8.2.2.2.1 External Component Selection
          2. 8.2.2.2.2 External Component Selection Using All Ceramic Output Capacitors
        3. 8.2.2.3 Application Curves
  9. Power Supply Recommendations
  10. 10Layout
    1. 10.1 Layout Guidelines
    2. 10.2 Layout Example
  11. 11Device and Documentation Support
    1. 11.1 Device Support
      1. 11.1.1 Third-Party Products Disclaimer
    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

Typical Characteristics

GUID-CB1187AB-0351-4617-9469-2A34C1A7D4A4-low.pngFigure 6-1 VDD Supply Current vs. Junction Temperature
GUID-28EE60A1-E7CB-4B53-A27F-D49517488B82-low.pngFigure 6-3 TRIP Pin Current vs. Junction Temperature
GUID-02B6EF51-A5D2-43F5-A85D-1E920407D284-low.pngFigure 6-5 Switching Frequency vs. Output Current
GUID-BB95B7D8-9A14-4FBE-980C-8E2E48C67F91-low.pngFigure 6-7 Switching Frequency vs. Output Current
GUID-D08A9375-D551-4AC8-B551-501BF1831EA2-low.pngFigure 6-9 Switching Frequency vs. Output Voltage
GUID-FCCD22E7-A254-4DA3-B300-406D17AAB5E5-low.pngFigure 6-11 Output Voltage vs. Input Voltage
GUID-92AFC069-EA91-4E0E-AE8A-3C0D129589EE-low.gifFigure 6-13 Start-Up Waveforms
GUID-991A0F4F-B8EF-490C-9317-B8407F9FEFDB-low.gifFigure 6-15 Shutdown Waveforms
GUID-8474A85D-5788-406C-9742-BCC2DB5F00A1-low.gifFigure 6-17 1.1-V Output FCCM Mode Steady-State Operation
GUID-FF11D6FB-671C-4829-8E36-B52DE7357E25-low.gifFigure 6-19 CCM-to-DCM Transition Waveforms
GUID-9A4578C1-7341-4DCC-AD54-CB6BC4D282E5-low.gifFigure 6-21 FCCM Load Transient
GUID-A17A2E4A-ADA3-4D3A-A395-0BDBB4B7E90A-low.gifFigure 6-23 Overcurrent Protection Waveforms
GUID-3F0BCA8F-8CAA-499C-A6A5-03E17118CB90-low.gifFigure 6-25 Overtemperature Protection Waveforms
GUID-5EC30F2B-FDE8-4659-ACCE-8209D4D0C780-low.pngFigure 6-27 Safe Operating Area
GUID-4FE91188-09B5-463A-A10B-0265544C986A-low.pngFigure 6-2 VDD Shutdown Current vs. Junction Temperature
GUID-60FE0CEB-8CC7-4496-94A7-0E130871697A-low.pngFigure 6-4 OVP/UVP Trip Threshold vs. Junction Temperature
GUID-24142757-EEB8-4F8D-9A2E-2CDCFD17A799-low.pngFigure 6-6 Switching Frequency vs. Output Current
GUID-EB45B851-D57E-4BEE-AD29-B386976DF619-low.pngFigure 6-8 Switching Frequency vs. Output Current
GUID-0BCAFA4A-C3A1-43DB-8980-8BB52F415298-low.pngFigure 6-10 Output Voltage vs. Output Current
GUID-20D1A05E-23C1-452C-9A2C-18CAC5FEBFE4-low.pngFigure 6-12 Efficiency vs Output Current
GUID-70746737-D03F-4F47-90D5-D5A63F47C4E5-low.gifFigure 6-14 Prebias Start-Up Waveforms
GUID-0D0FDFD7-A36B-40F5-BC6B-F9BBFE06A5F7-low.gifFigure 6-16 UVLO Start-Up Waveforms
GUID-4F300A47-0767-4845-8B84-6978463E9E51-low.gifFigure 6-18 1.1-V Output Skip Mode Steady-State Operation
GUID-EE63096A-70E2-4FE2-BBC8-5BCB0E9D90D8-low.gifFigure 6-20 DCM-to-CCM Transition Waveforms
GUID-6F8336E1-B459-4258-A9A9-9C04E0407725-low.gifFigure 6-22 Skip Mode Load Transeint
GUID-522EDCF9-A030-4E52-B39F-A1F631BCD023-low.gifFigure 6-24 Output Short-Circuit Protection Waveforms
GUID-36A8BAE8-BF5C-4AE3-9C8F-301A1DDB2820-low.pngFigure 6-26 Safe Operating Area

For VOUT = 5 V, an SC5026-1R0 inductor is used. For 1 ≤ VOUT ≤ 3.3 V, a PA0513.441 inductor is used

GUID-CF26068D-C587-456F-ADF8-7C923A0172AB-low.pngFigure 6-28 Efficiency vs Output Current
GUID-69C70158-F4E1-4B9F-8703-50FB3CEAFA73-low.pngFigure 6-30 Efficiency vs Output Current
GUID-8D8910B7-B6F2-453C-A16F-803A95A2B9AC-low.pngFigure 6-32 Efficiency vs Output Current
GUID-28AA02E3-2CE8-41EE-9CFF-CB2C986ADF46-low.pngFigure 6-29 Efficiency vs Output Current
GUID-AE7D1807-EA10-421D-B4D8-99DCE1A708D6-low.pngFigure 6-31 Efficiency vs Output Current
GUID-C8B9CDDD-A1BB-41C0-8059-5E3197DD63B9-low.pngFigure 6-33 Efficiency vs Output Current