In car power supply

[Mark Fabiny]

Be sure to look at the data sheets closely on the Power Trend stuff.  I
wanted to use one of their switching regulators on a 28V (32Vmax)
natural gas efi system.  Unfortunately, the devices I needed weren't
rated to 125C (under hood) temperature.  Granted, I was dissipating more
power then you will by going from 32V input to 5V output, and you might
not be mounting yours under the hood.  So they might work for you.  Just
something to check on.  Call Power Trends application engineers - they
were very helpful when I talked with them.

BTW, switching regulators in general are more prone to EMI than linear
regulators, at least in my experience.

Mark


Terry Sare wrote:
<snip>
>      Digikey:
>      Page 153 of Catalog 974B Power Trend Integrated Switching Regulators
> 
>      Yes, this is a switching regulator about the size of a 7805T with heat
>      sink. Self Contained, runs about 500Khz or higher. If you run any
>      analog DA or AD, a low pass filter would take care of the noise. They
>      have a web page at:
>      http://www.powertrends.com/isr/index.html