LM390 with MMC on/off switch

1 post / 0 new
Author
Message
#1
  • 1
  • 2
  • 3
  • 4
  • 5
Total votes: 0

Hi,

Is this going to work? The MMC card slot switch is to ground when the card lock is off. Not sure how to pull the logic pin low when the MMC is out of the card slot, or if current drain will drop the logic pin below 2V in a few seconds and shut the regulator down.

I want to powerup the M8 first, and then various periperals that have a large inductive load. I plan on booting from the MMC, so this powerup should be slow and steady.

http://www.national.com/ds/LM/LM...
..pg 4 for logic pin..

Thanks to any and all replies.

Attachment(s):