3.6v regulation

[barkerben]

Hi,

The PIC will run at 3.6v. However, my circuit contains 3 main modules:

PIC 16F628
GSM module (GR47)
GPS module (ZX4120)

The PIC can run at a very wide range of voltages (2.2-5.5 I think)
The GSM module can run from 3.4-6v (including ripple)
According to the datasheet, the GPS can run from 3.3v +-5%. However, in the same data sheet, it is specified that it can run up to 3.6v.

In this case I can run eveything from a 3.6v supply, which would be good :-)

Maybe I should email the manufacturers and ask them about the descrepancy...


Ben

[Ron Marcus]

Who makes the GPS module?

[barkerben]

It is sold by Crownhill (same people who run the forum it seems). I think it is made by Nemerix - they certainly make the internal chipset, although I'm not entirely sure :-)

Ben

[barkerben]

Looking through the data sheets, I might be able to get away with running eveything from 3.3v (which would make eveything very nice and simple. 3.3v regulators easy to get, everything running at same voltage)- it all depends on whether the GSM module (GR47 from erricson) can run at this level. It says 3.4v minimum, but it might work :-p

Ben

[Ron Marcus]

Looking through the data sheets, I might be able to get away with running eveything from 3.3v (which would make eveything very nice and simple. 3.3v regulators easy to get, everything running at same voltage)- it all depends on whether the GSM module (GR47 from erricson) can run at this level. It says 3.4v minimum, but it might work :-p

Ben

It's the ZX 4125 from Wonde Proud. It will operate up to....get this...3.6 volts! I am using one for a remote logging device. The input pins should not go above 3.3 volts. Slip a shottky diode in series with the PIC B+ line to drop it a bit for the I/Os. The GSM unit will be very finicky about voltage sags, so feed it well!