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???
09/06/10 15:39
Modified:
  09/06/10 15:48
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 		 #178459 - qualify
Responding to: ???'s previous message
Erik Malund said:I fail to see a modern design needing that amount of regulated 5V
I think you need to qualify that!

eg, PC power supplies still give many Amps at 5V...
(and even more at 3V)
I doubt (do not know) much in a PC still use 5V

and it should have been "I fail to see a modern '51 based design needing ....
sometimes I do not qualify that my posts in a '51 forum are '51 based

and thus it is no surprise it is discontinued.
More likely is that switch-mode designs are now favoured for such applications?
absolutely, the power loss with a linear regulator (notably a non-LDO) at higher currents is non-green and may add cooling costs

Erik



List of 21 messages in thread
TopicAuthorDate
LM78H05K Datasheet really exists?            01/01/70 00:00      
   Searching for Datasheets            01/01/70 00:00      
      photo            01/01/70 00:00      
         Yes, that's National Semiconductor            01/01/70 00:00      
            You are right again...            01/01/70 00:00      
               I think the "H" may be because it is 5A isnt it?            01/01/70 00:00      
                  from the days of burning your fingers            01/01/70 00:00      
                      I fail to see a modern design needing that amount...            01/01/70 00:00      
                        qualify            01/01/70 00:00      
                           Still need for power - but varying voltages and low loss            01/01/70 00:00      
                           12V the big favourite in a PC            01/01/70 00:00      
                     Killed off by switchers            01/01/70 00:00      
                        The heat was always a challenge with high-power linears            01/01/70 00:00      
                  Disapointed but clear.            01/01/70 00:00      
                     How so?            01/01/70 00:00      
                     You can make your own ...            01/01/70 00:00      
                        re: You can make your own            01/01/70 00:00      
                           Yes, they did, and those sheets were excellent!            01/01/70 00:00      
   the first mistake            01/01/70 00:00      
   Fairchild was the original manufacturer            01/01/70 00:00      
   these parts are hybrids ... so you can synthesize them            01/01/70 00:00      

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