Actually, Masters is on my roadmap if nothing pops up and eats my time.=20 Nope, we haven't needed anything beyond the data sheet up to this point, bu= t I'm trying to validate a corner case in a new design.=20 -- David VanHorn Lead Hardware Engineer Backcountry Access, Inc. 2820 Wilderness Pl, Unit H Boulder, CO =A080301 USA phone:=A0303-417-1345 =A0x110 email:=A0david.vanhorn@backcountryaccess.com=A0 -----Original Message----- From: piclist-bounces@mit.edu On Behalf Of Forres= t Christian (List Account) Sent: Wednesday, June 5, 2019 3:04 PM To: Microcontroller discussion list - Public. Subject: Re: [EE] It sounds like you haven't been assigned a FAE by microchip. If not, I'd call microchip sales, and ask/demand to be assigned a FAE. There's one that covers your area, guaranteed. My experience is that they don't automatically assign these to smaller customers but will if= asked - I have one and I only consume around 4-5K pcs of microchip product= s (around 2K of which are processors) per year. Tell the FAE what you're wanting to know - and they'll contact the factory = and get you a real answer quite possibly from the person who designed it. I'd also highly recommend attending microchip masters in Arizona in august. It will change the way you interact with microchip in a positive way, guaranteed. On Wed, Jun 5, 2019 at 3:47 PM David Van Horn wrote: > > No game.. > > Check the web site. Our products are not toys. If they don't work, peop= le die. Absolutely zero exaggeration there. ZERO tolerance for hobby hacks= .. > > That said, I need to find economical solutions. If I don't need extra pa= rts to make this work then I'm very happy. If I know I can't get there and= be 100% inside data sheet specs with all component tolerances accounted fo= r then that justifies whatever extra glue is needed. But I need to know on= e way or the other. At the moment, I'm leaning toward the glue simply b= ecause I can't find enough supporting docs to say "this works and I can bet= my life on it.". > I have to guarantee functionality under all spec'd operational conditions= .. > > If I won't bet my life on this product, why should you? > > Never read the book, but I've been tempted several times. > > I'm just hoping someone knows of an app note or similar that I can refere= nce one way or the other. > > > -- > David VanHorn > Lead Hardware Engineer > > Backcountry Access, Inc. > 2820 Wilderness Pl, Unit H > Boulder, CO 80301 USA > phone: 303-417-1345 x110 > email: david.vanhorn@backcountryaccess.com > > -----Original Message----- > From: piclist-bounces@mit.edu On Behalf Of=20 > Kerry > Sent: Wednesday, June 5, 2019 2:25 PM > To: piclist@mit.edu > Subject: Re: [EE] > > I think, therefor I am. All else is speculation and supposition. > > It is starting to sound like 1 of 3 things: > 1) You are playing some sort of a game with us. > 2) You are on the verge of a nervous breakdown. > 3) You are 2/3 of the way through reading "Zen and the Art of Motorcy= cle Maintenance" > > > > On 6/5/2019 12:59 PM, David Van Horn wrote: > > Agreed, but that assumes that the output fets are really linear resisto= rs at this operating point. > > I believe that is true, but I don't know it to be true. > > > > > > -- > > David VanHorn > > Lead Hardware Engineer > > > > Backcountry Access, Inc. > > 2820 Wilderness Pl, Unit H > > Boulder, CO 80301 USA > > phone: 303-417-1345 x110 > > email: david.vanhorn@backcountryaccess.com > > > > -----Original Message----- > > From: piclist-bounces@mit.edu On Behalf Of=20 > > Kerry > > Sent: Wednesday, June 5, 2019 8:14 AM > > To: piclist@mit.edu > > Subject: Re: [EE] > > > > Take the scientific approach. > > > > The ON resistance of the output FET is (VCC - VOUT) / IOUT. The=20 > > data sheet uses 3.6V as VCC, and specifies a 3mA load. Say the=20 > > output voltage is specified as 3.3V. The FET on resistance would be=20 > > .3V/.003A =3D 100 Ohms. At VCC =3D 3.3V and 1 uA load, output voltage= =20 > > would be 3.3V - > > (.000001 A * 100 Ohms) =3D 3.299V > > > > Kerry > > > > > > On 6/5/2019 7:47 AM, David Van Horn wrote: > >> Agreed on both counts, but I'm reluctant to move forward without somet= hing in writing. > >> I could measure hundreds of chips, but that says little about the next= batch. > >> > >> -- > >> David VanHorn > >> Lead Hardware Engineer > >> > >> Backcountry Access, Inc. > >> 2820 Wilderness Pl, Unit H > >> Boulder, CO 80301 USA > >> phone: 303-417-1345 x110 > >> email: david.vanhorn@backcountryaccess.com > > -- > > http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive=20 > > View/change your membership options at=20 > > http://mailman.mit.edu/mailman/listinfo/piclist > > > > -- > http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive=20 > View/change your membership options at=20 > http://mailman.mit.edu/mailman/listinfo/piclist > > -- > http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive=20 > View/change your membership options at=20 > http://mailman.mit.edu/mailman/listinfo/piclist -- - Forrest -- http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive View/chang= e your membership options at http://mailman.mit.edu/mailman/listinfo/piclis= t --=20 http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .