[ts-7000] ext PSU protection

["j.chitte" <>]

Hi,

I am currently running a TS7250 from a ext power supply that uses an 
adjustable buck regulator to drop to 6.5V then a 78 series linear 
reg. to trim to 5V.

The units need to be able to accept a wide range of switch mode DC 
supply voltages and I don't want the regulator ruining the amazingly 
low power drain of the TS boards by consuming 5 times more than the 
board itself.

I'd like to trim the component count and cost by using just a 5V buck 
regulator but I'm a bit wary of startup or some glitch blowing the 
board.

I considered a crowbar and polyfuse but it looks counter productive 
in cost and complexity.

Any suggestions?

Thanks.




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