[time-nuts] Switching regulator 12 > 4 V (3.3)

Tim Shoppa tshoppa at gmail.com
Sun Dec 4 16:06:30 EST 2016


I use the LM2574 for a lot of one-off applications the past decade or more.
For a 4V application you would start with LM2574-ADJ. It is available in
8-pin DIP, although the surface mount part is just as amenable to
dead-bugging, and does 0.5 amp no problem and runs perfectly cool. It does
not take (by modern standards) the smallest switching inductors and I
always do additional LC filtering at both input and output, so in terms of
"board space" this is quite a hog compared to more modern higher frequency
switchers.

Tim N3QE

On Sun, Dec 4, 2016 at 2:46 PM, KA2WEU--- via time-nuts <time-nuts at febo.com>
wrote:

> Who has a good recommendation for a switching power supply circuit, 12V DC
> in, 4 V/ 500mA out , Exactly 3.3 for IC voltage.
>
> 73 de Ulrich
>
>
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