[SI-LIST] Re: LDO power supply vs DC-DC switching supply

  • From: steve weir <weirsi@xxxxxxxxxx>
  • To: si-list@xxxxxxxxxxxxx
  • Date: Fri, 02 Aug 2013 09:32:15 -0700

In general the answer is yes.  A switching power supply in very 
simplistic terms: the switching superimposes a carrier on top of the 
normal regulator output that then requires filtering to remove.   Hard 
switching converters are simple and cheap, and tend to be the worst 
offenders.  However, there are switchers that are very quiet whether by 
brute force filtering and/or that use soft switching.    It shouldn't be 
surprising to learn that the latter cost more money.

Steve
On 8/2/2013 8:50 AM, Faraydon Pakbaz wrote:
> Greetings SI experts;
>
> Is LDO (Low drop out) power supply, less nosier than DC-DC switching power
> supply type?
> Are there application trade-offs between these two types of supply? Thanks
> in advance for
> your advise and comments.
>
> Regards;
>
> Don Pakbaz
>
>
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