SLUUD53 September   2024 TPS51388

 

  1.   1
  2.   Description
  3.   Features
  4.   Applications
  5.   5
  6. 1Evaluation Module Overview
    1. 1.1 Introduction
    2. 1.2 Kit Contents
    3. 1.3 Specification
    4. 1.4 Device Information
  7. 2Hardware
    1. 2.1 Test Setup and Procedure
      1. 2.1.1 EVM Connections
      2. 2.1.2 Test Equipment
      3. 2.1.3 Recommended Test Setup
        1. 2.1.3.1 Input Connections
        2. 2.1.3.2 Output connections
      4. 2.1.4 Test Procedure
        1. 2.1.4.1 Line and Load Regulation, Efficiency
  8. 3Implementation Results
    1. 3.1 Performance Data and Results
      1. 3.1.1 EVM Characteristics
      2. 3.1.2 Conversion Efficiency
      3. 3.1.3 Operating Waveforms
        1. 3.1.3.1 Start-Up and Shutdown with EN
        2. 3.1.3.2 Start-Up with VIN
        3. 3.1.3.3 Load Transient Response
        4. 3.1.3.4 Output Voltage Ripple
      4. 3.1.4 Thermal Performance
  9. 4Hardware Design Files
    1. 4.1 Schematic
    2. 4.2 PCB Layout
      1. 4.2.1 Multi-Layer Stackup
      2. 4.2.2 Component Drawings
    3. 4.3 Bill of Materials
  10. 5Compliance Information
    1. 5.1 Compliance and Certifications
  11. 6Additional Information
    1. 6.1 Trademarks
  12. 7Related Documentation

4.1 Schematic

The schematic for the TPS51388EVM is shown in Figure 4-1.

TPS51388EVM TPS51388EVM Schematic DiagramFigure 4-1 TPS51388EVM Schematic Diagram

The default operating frequency of TPS51388EVM is 600kHz. If the user wants to test the device behavior at 1000kHz (typical value), please use the jumper to short MODE to GND.

BYP pin is an external 5V VCC input and can connect to the output of the buck regulator if the output voltage is set between 4.8V to 5.2V. In the TPS51388EVM, since the output voltage is 5.15V, connect BYP to the output voltage through JP5. If the output voltage is less than 4.8V and the user wants to improve the light load efficiency, then remove the jumper on JP5, and the external BYP voltage is higher than 4.8V. Note that the BYP external voltage must come after VIN voltage on and quit before VIN off.