If you can not spare the voltage can you spare some current? I once had a 5V supply at one end of a 100 foot long cable, and a 5V device at the other end. Wasn't my idea, I inherited the mess.
My solution was to put in a 5V in 5V out DC/DC converter. SEPIC's are not that hard to come up with these days that work well in this type of application. On Thursday 13 February 2003 02:30 pm, Robert Ritchey wrote: > Declan, > This is my problem. My client already uses regulated 5V wall-warts for his > USB hub rated at 2.1A. He wants to use the wall-wart for the device I just > designed. Actually I just got PCBs back today, no protection. Anyway, it > uses all 5V and is not tolerant of anything less than 5V. I can't get away > away with 4.5V or 4.6V using a LDO regulator rated at about 1A or 1.5A > (most LDOs of this size have 400mV-600mV dropouts at rated load). > Scare tactics don't work here, I will just lose my work if I start arguing. I > came too close a year ago arguing a digital fact I knew a lot about. I need > the work, not much else out there right now. -- Author: Bob Paddock INET: [EMAIL PROTECTED] Fat City Network Services -- 858-538-5051 http://www.fatcity.com San Diego, California -- Mailing list and web hosting services --------------------------------------------------------------------- To REMOVE yourself from this mailing list, send an E-Mail message to: [EMAIL PROTECTED] (note EXACT spelling of 'ListGuru') and in the message BODY, include a line containing: UNSUB CHIPDIR-L (or the name of mailing list you want to be removed from). You may also send the HELP command for other information (like subscribing).
