SLUP409C January   2022  – February 2025 TPS543320 , TPS543620 , TPS543820 , TPS62913 , TPS62916 , TPSM82913 , TPSM82916

 

  1.   1
  2.   Abstract
  3. 1 Introduction
  4. 2 DC/DC Converters are Noisy
  5. 3 Power-Supply Output Voltage Ripple and Noise Degrade ADC Performance
  6. 4 Minimizing Low-Frequency Noise Requires Dedicated Low-Noise IC Technologies
  7. 5 Traditional Approaches to Reducing Ripple
  8. 6 Using Smaller Capacitors in Parallel
  9. 7 Larger Inductance
  10. 8 Adding a Feedthrough Capacitor
  11. 9 Adding a Ferrite Bead
  12. 10Layout Techniques
  13. 11Silicon Solutions
  14. 12Conclusions

Abstract

Many noise-sensitive systems use low-dropout regulators (LDOs) to provide low-noise and low-ripple power to sensitive analog circuits. But with growing current demands for these rails, designers are struggling to include LDOs because of their size, power loss, thermal rise and cost.