I'm designing a low power board. I need to make 3.3V.
Is it more efficient in general to take a 9V battery and switch down to
I know it depends on how efficient the switcher is... I'm just trying to decide Buck or Boost.
Thanks,
Eric
Hi Eric,
Check L6920 from ST.
Vladimir Vassilevsky
DSP and Mixed Signal Design Consultant
Not sure which is more efficient, but maybe switch up is your best option using charge pump device. TI do some devices specifically for converting two AA batteries to 3v3. See
Regards,
Paul.
Note that from the user's standpoint, it's much more efficient for him to use 2 AA batteries. They are much cheaper per watthour, have less internal resistance and are easer to find fresh than 9v batteries.
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