SLVAF22B january   2021  – august 2023 TPS544C26 , TPS548A28 , TPS548B28 , TPS548C26 , TPS54J061

 

  1.   1
  2.   Abstract
  3.   Trademarks
  4. 1Suggested DC/DC Converters
  5. 2Voltage Regulation Accuracy
  6. 3Load Transient Response
  7. 4High Efficiency and Thermal Performance
  8. 5Linear Regulator with Adjustable Soft-Start
  9. 6Conclusion
  10. 7Additional Resources
  11. 8Revision History

5 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 5-1 illustrates the start-up waveform showing the start-up times varying over several soft start capacitor values.

GUID-92EEEED7-4246-497C-94E7-131336C3C409-low.pngFigure 5-1 TPS74801 Start-up Waveforms