SLUSBN5C August   2013  – February 2026 TPS53515

PRODUCTION DATA  

  1.   1
  2. 1 Features
  3. 2 Applications
  4. 3 Description
  5. 4 Pin Configuration and Functions
  6. 5 Specifications
    1. 5.1 Absolute Maximum Ratings
    2. 5.2 ESD Ratings
    3. 5.3 Recommended Operating Conditions
    4. 5.4 Thermal Information
    5. 5.5 Electrical Characteristics
    6. 5.6 Typical Characteristics
  7. 6 Detailed Description
    1. 6.1 Overview
    2. 6.2 Functional Block Diagram
    3. 6.3 Feature Description
      1. 6.3.1  5V LDO and VREG Start-Up
      2. 6.3.2  Enable, Soft Start, and Mode Selection
      3. 6.3.3  Frequency Selection
      4. 6.3.4  D-CAP3 Control and Mode Selection
        1. 6.3.4.1 D-CAP3™ Control Mode
        2. 6.3.4.2 Sample and Hold Circuitry
        3. 6.3.4.3 Adaptive Zero-Crossing
      5. 6.3.5  Power-Good
      6. 6.3.6  Current Sense and Overcurrent Protection
      7. 6.3.7  Overvoltage and Undervoltage Protection
      8. 6.3.8  Out-of-Bounds Operation
      9. 6.3.9  UVLO Protection
      10. 6.3.10 Thermal Shutdown
    4. 6.4 Device Functional Modes
      1. 6.4.1 Auto-Skip Eco-mode Light Load Operation
      2. 6.4.2 Forced Continuous-Conduction Mode
  8. 7 Application and Implementation
    1. 7.1 Application Information
    2. 7.2 Typical Application
      1. 7.2.1 Design Requirements
      2. 7.2.2 Detailed Design Procedure
        1. 7.2.2.1 Choose the Switching Frequency
        2. 7.2.2.2 Choose the Operation Mode
        3. 7.2.2.3 Choose the Inductor
        4. 7.2.2.4 Choose the Output Capacitor
        5. 7.2.2.5 Determine the Value of R1 and R2
      3. 7.2.3 Application Curves
    3. 7.3 Power Supply Recommendations
    4. 7.4 Layout
      1. 7.4.1 Layout Guidelines
      2. 7.4.2 Layout Example
      3. 7.4.3 Thermal Performance
  9. 8 Device and Documentation Support
    1. 8.1 Documentation Support
      1. 8.1.1 Related Documentation
    2. 8.2 Receiving Notification of Documentation Updates
    3. 8.3 Support Resources
    4. 8.4 Trademarks
    5. 8.5 Electrostatic Discharge Caution
    6. 8.6 Glossary
  10. 9 Revision History
  11. 10Mechanical, Packaging, and Orderable Information

6.3.4.2 Sample and Hold Circuitry

TPS53515 Sample and Hold Logic CircuitryFigure 6-4 Sample and Hold Logic Circuitry

The sample and hold circuitry is the difference between D-CAP3 control mode and D-CAP2. The sample and hold circuitry, which is an advance control scheme to boost output voltage accuracy higher on the TPS53515 device, is one of features of the TPS53515 device. The sample and hold circuitry generates a new DC voltage of CSN instead of the voltage which is produced by RC2 and CC2 which allows for tight output-voltage accuracy and makes the TPS53515 device more competitive.

TPS53515 Continuous Conduction Mode (CCM) With Sample and Hold CircuitryFigure 6-5 Continuous Conduction Mode (CCM) With Sample and Hold Circuitry
TPS53515 Continuous Conduction Mode (CCM) Without Sample and Hold CircuitryFigure 6-7 Continuous Conduction Mode (CCM) Without Sample and Hold Circuitry
TPS53515 Output Voltage vs Output CurrentFigure 6-9 Output Voltage vs Output Current
TPS53515 Discontinuous Conduction Mode (DCM) With Sample and Hold CircuitryFigure 6-6 Discontinuous Conduction Mode (DCM) With Sample and Hold Circuitry
TPS53515 Discontinuous Conduction Mode (DCM) Without Sample and Hold CircuitryFigure 6-8 Discontinuous Conduction Mode (DCM) Without Sample and Hold Circuitry
TPS53515 Output Voltage vs Output CurrentFigure 6-10 Output Voltage vs Output Current