https://www.dropbox.com/sh/6scihn40t60qm7k/AADq46F-s7aBowSgcaVrIr_ua?dl=0 I'm still waiting for the Spice model for the 8078. I think I can make it do positive to dual negative conversion. -- John Larkin Highland Technology, Inc picosecond timing precision measurement jlarkin att highlandtechnology dott com http://www.highlandtechnology.com
neat power parts
Started by ●February 19, 2020
Reply by ●February 19, 20202020-02-19
onsdag den 19. februar 2020 kl. 19.35.39 UTC+1 skrev John Larkin:> https://www.dropbox.com/sh/6scihn40t60qm7k/AADq46F-s7aBowSgcaVrIr_ua?dl=0 > > I'm still waiting for the Spice model for the 8078. I think I can make > it do positive to dual negative conversion. >https://www.analog.com/media/en/reference-design-documentation/design-notes/dn1021fa.pdf
Reply by ●February 19, 20202020-02-19
On Wednesday, February 19, 2020 at 11:35:39 AM UTC-7, John Larkin wrote:> https://www.dropbox.com/sh/6scihn40t60qm7k/AADq46F-s7aBowSgcaVrIr_ua?dl=0 > > I'm still waiting for the Spice model for the 8078. I think I can make > it do positive to dual negative conversion. > > > -- > > John Larkin Highland Technology, Inc > picosecond timing precision measurement > > jlarkin att highlandtechnology dott com > http://www.highlandtechnology.comThose little switching regulators blow me away. They do take some of the fun out of on-board power supply design though. The ripple could be better and sometimes the maximum load capacitance is a bummer, but they can really speed up some designs.
Reply by ●February 19, 20202020-02-19
On Wed, 19 Feb 2020 10:42:01 -0800 (PST), Lasse Langwadt Christensen <langwadt@fonz.dk> wrote:>onsdag den 19. februar 2020 kl. 19.35.39 UTC+1 skrev John Larkin: >> https://www.dropbox.com/sh/6scihn40t60qm7k/AADq46F-s7aBowSgcaVrIr_ua?dl=0 >> >> I'm still waiting for the Spice model for the 8078. I think I can make >> it do positive to dual negative conversion. >> > >https://www.analog.com/media/en/reference-design-documentation/design-notes/dn1021fa.pdfWe often do that here. But I want the cute little dual LTM to make two different negative rails. I'd like to Spice that, because the BGA is hard to breadboard. I'd love to x-ray the LTM8078. How can they do that? Does anyone have a high-res x-ray? Ours is a big parts counter and doesn't have useful resolution for ICs. -- John Larkin Highland Technology, Inc picosecond timing precision measurement jlarkin att highlandtechnology dott com http://www.highlandtechnology.com
Reply by ●February 19, 20202020-02-19
onsdag den 19. februar 2020 kl. 20.04.50 UTC+1 skrev John Larkin:> On Wed, 19 Feb 2020 10:42:01 -0800 (PST), Lasse Langwadt Christensen > <langwadt@fonz.dk> wrote: > > >onsdag den 19. februar 2020 kl. 19.35.39 UTC+1 skrev John Larkin: > >> https://www.dropbox.com/sh/6scihn40t60qm7k/AADq46F-s7aBowSgcaVrIr_ua?dl=0 > >> > >> I'm still waiting for the Spice model for the 8078. I think I can make > >> it do positive to dual negative conversion. > >> > > > >https://www.analog.com/media/en/reference-design-documentation/design-notes/dn1021fa.pdf > > > We often do that here. But I want the cute little dual LTM to make two > different negative rails. I'd like to Spice that, because the BGA is > hard to breadboard. > > I'd love to x-ray the LTM8078. How can they do that? > > Does anyone have a high-res x-ray? Ours is a big parts counter and > doesn't have useful resolution for ICs. >try a dentist?
Reply by ●February 19, 20202020-02-19
On Wed, 19 Feb 2020 10:50:29 -0800 (PST), DemonicTubes <tlackie@gmail.com> wrote:>On Wednesday, February 19, 2020 at 11:35:39 AM UTC-7, John Larkin wrote: >> https://www.dropbox.com/sh/6scihn40t60qm7k/AADq46F-s7aBowSgcaVrIr_ua?dl=0 >> >> I'm still waiting for the Spice model for the 8078. I think I can make >> it do positive to dual negative conversion. >> >> >> -- >> >> John Larkin Highland Technology, Inc >> picosecond timing precision measurement >> >> jlarkin att highlandtechnology dott com >> http://www.highlandtechnology.com > >Those little switching regulators blow me away. They do take some of the fun out of on-board power supply design though. > >The ripple could be better and sometimes the maximum load capacitance is a bummer, but they can really speed up some designs.They are very quiet too. The nasty circulating currents are mostly local to the brick. The 8078 is amazing, but it does need external caps. Neither the Spice model nor the eval board seem to be ready. -- John Larkin Highland Technology, Inc picosecond timing precision measurement jlarkin att highlandtechnology dott com http://www.highlandtechnology.com
Reply by ●February 19, 20202020-02-19
On Wednesday, February 19, 2020 at 1:35:39 PM UTC-5, John Larkin wrote:> https://www.dropbox.com/sh/6scihn40t60qm7k/AADq46F-s7aBowSgcaVrIr_ua?dl=0 > > I'm still waiting for the Spice model for the 8078. I think I can make > it do positive to dual negative conversion. >Upon first (quick) glance of the spec sheet PDF, I thought the MTBF was only 4.5 minutes. :) Thankfully, it's much higher than that.
Reply by ●February 19, 20202020-02-19
On Wednesday, February 19, 2020 at 11:04:50 AM UTC-8, John Larkin wrote:> Does anyone have a high-res x-ray? Ours is a big parts counter and > doesn't have useful resolution for ICs.But, an X-ray will only show leads and little squares where the silicon is. It's not likely to distinguish wiring or doping, unless you first strip off the epoxy and do fluorescence microprobing. For the kind of resolution that would find component parts of an IC, you'd have to hang out at a synchrotron next to the X-ray laser. Better to use an electron microscope (you still have to strip the epoxy). Either way, synchrotron or microscope, you're doing it with vacuum tubes.
Reply by ●February 19, 20202020-02-19
onsdag den 19. februar 2020 kl. 22.10.55 UTC+1 skrev whit3rd:> On Wednesday, February 19, 2020 at 11:04:50 AM UTC-8, John Larkin wrote: > > > Does anyone have a high-res x-ray? Ours is a big parts counter and > > doesn't have useful resolution for ICs. > > But, an X-ray will only show leads and little squares where the silicon is. > It's not likely to distinguish wiring or doping, unless you first strip off the epoxy > and do fluorescence microprobing. > > For the kind of resolution that would find component parts of an IC, you'd > have to hang out at a synchrotron next to the X-ray laser. > > Better to use an electron microscope (you still have to strip the epoxy). > Either way, synchrotron or microscope, you're doing it with vacuum tubes.http://www.pmdtkt.upc.smm.lt/dokumentai/Medziaga/inzinerine/mm12/Priedai/2_priedas.%2022_LGA_montavimo_rekomendacijos.pdf
Reply by ●February 19, 20202020-02-19
On Wed, 19 Feb 2020 13:15:19 -0800 (PST), Lasse Langwadt Christensen <langwadt@fonz.dk> wrote:>onsdag den 19. februar 2020 kl. 22.10.55 UTC+1 skrev whit3rd: >> On Wednesday, February 19, 2020 at 11:04:50 AM UTC-8, John Larkin wrote: >> >> > Does anyone have a high-res x-ray? Ours is a big parts counter and >> > doesn't have useful resolution for ICs. >> >> But, an X-ray will only show leads and little squares where the silicon is. >> It's not likely to distinguish wiring or doping, unless you first strip off the epoxy >> and do fluorescence microprobing. >> >> For the kind of resolution that would find component parts of an IC, you'd >> have to hang out at a synchrotron next to the X-ray laser. >> >> Better to use an electron microscope (you still have to strip the epoxy). >> Either way, synchrotron or microscope, you're doing it with vacuum tubes. > >http://www.pmdtkt.upc.smm.lt/dokumentai/Medziaga/inzinerine/mm12/Priedai/2_priedas.%2022_LGA_montavimo_rekomendacijos.pdfThe inductors would be interesting in LTM8078. -- John Larkin Highland Technology, Inc picosecond timing precision measurement jlarkin att highlandtechnology dott com http://www.highlandtechnology.com
