SNVAA29 October   2021 TPS542A50 , TPS543320 , TPS543B20 , TPS543C20A , TPS546A24A , TPS546B24A , TPS546D24A , TPS548A28 , TPS548B28 , TPS54J061

 

  1.   Trademarks
  2. 1Suggested DC/DC Converters
  3. 2Low Ripple Noise
  4. 3Voltage Regulation Accuracy
  5. 4High Efficiency and Thermal Performance
  6. 5Load Transient Response
  7. 6Linear Regulator with Adjustable Soft-Start
  8. 7Conclusion
  9. 8Additional Resources

6 Linear Regulator with Adjustable Soft-Start

For low current rails, a linear regulator with a user-programmable soft-start minimizes stress on the input power source by reducing the capacitive inrush current on start-up, especially from highly capacitive loads or with processors requiring many bypass capacitors. The TPS74801 adjustable linear regulator provides a monotonic (non-negative slope) soft-start that is well-suited for powering many different types of processors. Figure 6-1 illustrates the start-up waveform showing the start-up times varying over several soft start capacitor values.

GUID-21D436B0-F551-479B-A9EB-021A389196B4-low.pngFigure 6-1 TPS74801 Start-up Waveforms