SLVAE92A March   2019  – January 2020 TPS51200 , TPS53317A , TPS53513 , TPS53515 , TPS53915 , TPS543B20 , TPS543C20A , TPS54424 , TPS544B20 , TPS546D24 , TPS546D24A , TPS54824 , TPS548A20 , TPS548A28 , TPS548B22 , TPS548B28 , TPS549A20 , TPS549B22 , TPS549D22 , TPS54J061 , TPS62147 , TPS74801

 

  1.   Trademarks
  2. 1Suggested DC/DC Converters
  3. 2Voltage Regulation Accuracy
  4. 3Load Transient Response
  5. 4High Efficiency and Thermal Performance
  6. 5Linear Regulator with Adjustable Soft-Start
  7. 6Conclusion
  8. 7Additional Resources
  9. 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-B9DD0BC8-18D4-42C3-AB26-0060E6B35212-low.pngFigure 5-1 TPS74801 Start-up Waveforms