Re: UCC33420 dc/dc converter eval

On Wed, 09 Apr 2025 15:27:16 -0700, john larkin <jl@glen--canyon.com>
wrote:

>
>
My TI rep was being difficult, so I just bought an eval board from
Digikey for $100.
>
It makes a nice 4.993 volt output, but it's wicked noisy.
>
https://www.dropbox.com/scl/fo/8fybyu5l3w4tdgt1y0386/AFunYi9K15UgNpkQzEbYaVA?rlkey=j261b4ca5kc966vq2y03fw0md&dl=0
>
53% efficient into that 0.25 watt load.

I tried to order a few of that chip, to xray one just for fun. My
purchasing lady says none are available, not even from TI.

Mouser shows the eval board as obsolete. Curious.