Greetings All!  I am looking again for sage advice from some veteran
PICsters.  I was wondering if anyone has experience powering a PIC with
a switching power supply.  In my design, I am using a 17C752 and I want
to supply Vcc with a 24V to 5V step down 150kHz switching regulator.  In
my initial testing, I find that the average output of the switcher is
pretty good at about 5.02V throughout a range of loads from 20mA to
500mA, but noise on the output can be up to 300mV.  Question is, will
the PIC have trouble with this noise magnitude at 150kHz.

I have thought about cleaning up the output with an LDO, but I'd rather
not go to the trouble and expense if I can help it.

+++++++++++++++++++++++++++++++++++++++
++      Dan Tye
++      Chief Engineer
++      Tel-Tron Technologies Corporation
++      220 Fentress Boulevard
++      Daytona Beach, FL 32114
++      Phone: 904-255-1921    Fax: 904-258-3782
+++++++++++++++++++++++++++++++++++++++