Thank you for your answer. For some reason I had a tough time figuring that out. This list is great!

Thank You,

Michael Ewald

On Jul 28, 2010, at 11:35 AM, wrote:

Message: 2
Date: Wed, 28 Jul 2010 11:24:24 -0700
From: Dave Hylands <>
Subject: Re: [Gumstix-users] Summit Board: VCC_3.3 Max Current / what
is it driven by?
To: "General mailing list for gumstix users."
Content-Type: text/plain; charset=ISO-8859-1

HI Michael,

On Wed, Jul 28, 2010 at 6:43 AM, Michael Ewald <> wrote:

I'm looking to power my GPS from VCC_3.3 pin on the Summit board. It is located in the 40 pin header. I'm confused as to what would drive the VCC_3.3 pin, is it the COM or the Summit? How many mA can I draw before things go very bad? My application will never exceed 200 mA but I think typical usage will be around 110 mA.

Is the 5V 50 mA Regulator driving it, the TPS62111, or the COM?

Looking at the schematics, the VCC_3.3 comes from the TPS62111.

I would imagine that you should be able to draw 200mA without any
issues. If you don't have wireless or bluetooth, then you'll
definitely be able to do it.

Dave Hylands
Shuswap, BC, Canada