SLVAFE0 February   2023 TPS62441-Q1 , TPS62442-Q1 , TPS62810-Q1 , TPS62811-Q1 , TPS62812-Q1 , TPS62813-Q1 , TPS628501-Q1 , TPS628502-Q1 , TPS628503-Q1 , TPS62870 , TPS62870-Q1 , TPS62871 , TPS62871-Q1 , TPS62872 , TPS62872-Q1 , TPS62873 , TPS62873-Q1 , TPS62874-Q1 , TPS62875-Q1 , TPS62876-Q1 , TPS62877-Q1 , TPSM8287A06 , TPSM8287A12 , TPSM8287A15

 

  1.   Abstract
  2.   Trademarks
  3. 1Overview
  4. 2Detailed Description
    1. 2.1 Input Filter Design
    2. 2.2 Output Filter Design (Second Stage)
  5. 3Measurement and Analysis
  6. 4Damping of the Filters
  7. 5Further Analysis with Damped Filters
  8. 6Conclusion
  9. 7Reference

6 Conclusion

This analysis concludes that integrating input and output filters into the step-down converter circuit reduces input and output voltage ripple while filtering out high-frequency noise. The difficulty comes when the output impedance of the filters influences the closed-loop transfer function of the converter. However, it can be carefully designed so that resonances caused by these elements are appropriately damped and have a low-quality factor. If the load is excited at any resonance frequency of the impedance curve, it should not stimulate voltage noise in the power delivery network in the worst case.