M
Markus Zingg
- Jan 1, 1970
- 0
Hi all
This is most likely a dumb question, but
I do have a digital design requiereing 3.3 and 5v supply. One of the
chips however is a mixed signal kind and requieres analog ground and
analog power (also 3.3v). The external voltage I can use is 12v and
apart from this mixed signal chip, I would have used two voltage
regulators in series, one regulating down to 5 and from there to 3.3v.
Overall power consumtion is < 500mW. Can I now simply use a third
regulator to say regulate the 5v once more down to 3.3 and use it for
the mixed signal analog supply pins? Is this the way this is usually
done?
TIA
Markus
This is most likely a dumb question, but
I do have a digital design requiereing 3.3 and 5v supply. One of the
chips however is a mixed signal kind and requieres analog ground and
analog power (also 3.3v). The external voltage I can use is 12v and
apart from this mixed signal chip, I would have used two voltage
regulators in series, one regulating down to 5 and from there to 3.3v.
Overall power consumtion is < 500mW. Can I now simply use a third
regulator to say regulate the 5v once more down to 3.3 and use it for
the mixed signal analog supply pins? Is this the way this is usually
done?
TIA
Markus