EM-406 3.3v ?

GPS/GNSS Development Boards
1

I’m looking at using the EM-406, but I need it to run on 3.3 volts.

The datasheet and most places list the input voltage as approx 5v, though it seems that there’s a built-in voltage regulator which brings that down to 3.3v. Is there a way to bypass that regular?

I noticed that on http://www.sparkfun.com/commerce/present.php?p=GPSPage1 it states “All the GPS modules we stock run on 3.3 volts.” Perhaps it’ll run off of 3.3v? Has anyone tried simply feeding this thing 3.3v?

I’m looking for a SiRF III 3.3v solution with built-in antenna. I’m hoping the SiRF III will give better results in marginal conditions than my current module (Laipac PG-31)

Thanks!

2

Boone:
I’m looking at using the EM-406, but I need it to run on 3.3 volts.

The datasheet and most places list the input voltage as approx 5v, though it seems that there’s a built-in voltage regulator which brings that down to 3.3v. Is there a way to bypass that regular?

I noticed that on http://www.sparkfun.com/commerce/present.php?p=GPSPage1 it states “All the GPS modules we stock run on 3.3 volts.” Perhaps it’ll run off of 3.3v? Has anyone tried simply feeding this thing 3.3v?

I’m looking for a SiRF III 3.3v solution with built-in antenna. I’m hoping the SiRF III will give better results in marginal conditions than my current module (Laipac PG-31)

Thanks!

I believe you're correct about there being some sort of vreg onboard as it takes such a wide input voltage range. I contacted the manufacturer and they told me I couldn't run it directly off of 3.3V, but I did not mention bypassing the vregs.

There are many dc-dc converters that could easily step up the 3.3 to 5 - The Microchip MCP1253 looks like a good fit.