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

7.2.2.1 Choose the Switching Frequency

The switching frequency is configured by the resistor divider on the RF pin. Select one of eight switching frequencies from 250kHz to 1MHz. Refer to Table 6-1 for the relationship between the switching frequency and resistor-divider configuration.