SLVU097B October   2003  – October 2021 TPS54350

 

  1.   Trademarks
  2. 1Introduction
    1. 1.1 Background
    2. 1.2 Performance Specification Summary
    3. 1.3 Modifications
      1. 1.3.1 Output Voltage Setpoint
      2. 1.3.2 Switching Frequency
      3. 1.3.3 Input Filter
      4. 1.3.4 UVLO Programming
      5. 1.3.5 Synchronization
      6. 1.3.6 Power Good
      7. 1.3.7 Synchronous Low-Side FET
      8. 1.3.8 Optional Output Filtering
  3. 2Test Setup and Results
    1. 2.1  Input/Output Connections
    2. 2.2  Efficiency
    3. 2.3  Power Dissipation
    4. 2.4  Output Voltage Regulation
    5. 2.5  Load Transients
    6. 2.6  Loop Characteristic
    7. 2.7  Output Voltage Ripple
    8. 2.8  Input Voltage Ripple
    9. 2.9  Gate Drive
    10. 2.10 Powering Up and Down
  4. 3Board Layout
    1. 3.1 Layout
  5. 4Schematic and Bill of Materials
    1. 4.1 Bill of Materials
  6. 5Revision History

1.3.2 Switching Frequency

The switching frequency can be trimmed to any value between 250 kHz and 700 kHz by changing the value of R4. The switching frequency can also be set to pre-programmed values of 250 kHz by shorting the RT pin to AGND, or 500 kHz by floating the RT pin. Decreasing the switching frequency results in increased output ripple unless the value of L1 is increased.