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App note: Reducing system noise and voltage overshoot in buck topology switch mode regulators

Posted on Saturday, October 6th, 2012 in app notes by DP

Here is an article describing how to reduce noise and voltage overshoot in buck topology DC/DC converters. Slowing down the turn on time of the high side switch in conjunction with replacing a diode with a low side switch should increase efficiency and lower the power dissipation.

Adding snubers (RC circuit) in parallel to the low side switch should help decrease overshoot, and lower noise. As always, the best thing to lower the noise is to carefully layout the PCB. High currents and switching operation can add loads of noise if the leads carrying that current are long, so keep them as short as possible.

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Recent Comments

  • DP.: fixed, thanks
  • Bovine: Title of article has the wrong number for ESP8266 typed.
  • burkm m: It drifting even further using that standard XO...
  • langwadt: a HC14 is a bad choice for an xtal oscillator, the unbuffered non-Schmitt trigger HCU04 is much better for that application
  • Bill F: I'm ready for one!