Can switching regulators cause interference on wifi based circuits?

I read that buck and boost converter due its switching mode produces too many noises compared with linear regulators but it is more efficient.

Can those those noises cause interference on boards with wifi chips on it?

How would be a good way to measure how big would be such interference at the point to determine that it is worth to use a linear regulator even without power efficiency?

Answered! View the answer I have this problem too

Is this a good question?

Score 0


Hi, This might be a good starting point.


Add a comment
Spread Fixmas Cheer
Get $12 off your purchase of $50 or more with code FIXMAS12
Spread Fixmas Cheer
Get $12 off your purchase of $50 or more with code FIXMAS12

1 Answer

Chosen Solution

I am not an electronics engineer but it is correct to say that SMPS are inherently noisy. Linear Regulators, when properly designed are not.

That said, applying proper filtering and EMI reduction are key to proper product design. A good example is smartphones. They have multiple SMPS cohabiting with WiFi and other radio frequency devices all on a single (and tiny) pcb.

Generally speaking, PS requirements are based more on power and heat dissipation than EMI because you can always filter out noise but you can't eliminate heat.

Not sure if this helps or not...StackExchange or EEVBLOG Forum is probably a better place for this question.

Was this answer helpful?

Score 2
Add a comment

Add your answer

AmandaLi will be eternally grateful.
View Statistics:

Past 24 Hours: 0

Past 7 Days: 0

Past 30 Days: 3

All Time: 63