Rick, Some additional information is called for. First, what do you mean by "slow to respond"? Do you mean step load response in us, ms, s? Second, the mechanism used to share the supplies was _____. I would presume a droop method using a common current control bus, but that is an assumption. Third, were the planes all stitched together over their area, or were the ties limited some how. Off-hand, it sounds like you did not connect the current share sense between the supplies, or you are using supplies not designed for current sharing, or the bulk capacitance has not been properly engineered. Regards, Steve. At 07:47 AM 5/3/2004 -0700, Baze, Rick wrote: >Hello, > >A recent PCB design required ganging three power supplies together. In = >turn, three power planes are connected on the PCB. Using typical = >decoupling capacitors at the initial contact point on the PCB, it was = >noticed that the power supplies are slow to respond. A similar design = >ganged two supplies and the PCB had two power planes. No power supply = >issue were seen. What would cause this problem and what suggestions are = >there to remedy is problem? > >Thanks, >Rick Baze > >------------------------------------------------------------------ >To unsubscribe from si-list: >si-list-request@xxxxxxxxxxxxx with 'unsubscribe' in the Subject field > >or to administer your membership from a web page, go to: >//www.freelists.org/webpage/si-list > >For help: >si-list-request@xxxxxxxxxxxxx with 'help' in the Subject field > >List FAQ wiki page is located at: > http://si-list.org/wiki/wiki.pl?Si-List_FAQ > >List technical documents are available at: > http://www.si-list.org > >List archives are viewable at: > //www.freelists.org/archives/si-list >or at our remote archives: > http://groups.yahoo.com/group/si-list/messages >Old (prior to June 6, 2001) list archives are viewable at: > http://www.qsl.net/wb6tpu > ------------------------------------------------------------------ To unsubscribe from si-list: si-list-request@xxxxxxxxxxxxx with 'unsubscribe' in the Subject field or to administer your membership from a web page, go to: //www.freelists.org/webpage/si-list For help: si-list-request@xxxxxxxxxxxxx with 'help' in the Subject field List FAQ wiki page is located at: http://si-list.org/wiki/wiki.pl?Si-List_FAQ List technical documents are available at: http://www.si-list.org List archives are viewable at: //www.freelists.org/archives/si-list or at our remote archives: http://groups.yahoo.com/group/si-list/messages Old (prior to June 6, 2001) list archives are viewable at: http://www.qsl.net/wb6tpu