SDAA041 January   2026 TPSM33620-Q1

 

  1.   1
  2.   Abstract
  3.   Trademarks
  4. 1Introduction
  5. 2Conducted EMI
    1. 2.1 Differential-Mode Noise
    2. 2.2 Common-Mode Noise
  6. 3Radiated EMI
    1. 3.1 Critical Loop Routing
    2. 3.2 Snubber Circuit
    3. 3.3 PCB Layout Techniques
  7. 4Summary
  8. 5References

Abstract

Electromagnetic interference (EMI) is a prevailing challenge in today’s digital world. From buck converter to microcontroller, virtually every electronic device is susceptible to both emitting and receiving EMI. While invisible to the naked eye, EMI has the potential to disrupt critical signals and systems, potentially degrading performance. Within automotive applications, there is great demand to achieve power efficient systems that can comply with the strict EMI guidelines that govern the electronic world. This application note analyzes various techniques and practices that are used to achieve emission compliance (EMC) with the TPSM33620-Q1, an efficient buck converter power module.