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???
12/08/08 18:06
Modified:
  12/08/08 18:34
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 		 #160746 - I think it is equally important that ...
Responding to: ???'s previous message
Anyways, Erik's recommendation of using a reset supervisor for one of its intended purposes -- to ensure that the processor is held in reset until AFTER the power supply has ramped up fully and is stable -- is completely reasonable and should not have been dismissed out of hand!
.... the processor is held in reset while the power supply is ramping down.

With a HUGE "reservoir cap" and a strong supply to it, the rampup can be relatively short, but the ramp down will be much longer.

Erik


List of 26 messages in thread
TopicAuthorDate
Decoupling capacitance can kill the regulator?            01/01/70 00:00      
   Yes, LDOs are sensitive...            01/01/70 00:00      
   and that's not all ...            01/01/70 00:00      
      was there a supervisor?            01/01/70 00:00      
         No ...            01/01/70 00:00      
            you have yourself posted re ....            01/01/70 00:00      
               as often happens ...            01/01/70 00:00      
                  who 'injected'?            01/01/70 00:00      
                     It's on you, Erik!            01/01/70 00:00      
                        what was 'injected'            01/01/70 00:00      
                           What I injected was potential failure modes ...            01/01/70 00:00      
                              not if Vdd drop below            01/01/70 00:00      
                                 This is not the place to argue that matter!            01/01/70 00:00      
                              reset vs supervisor            01/01/70 00:00      
                                 I think it is equally important that ...            01/01/70 00:00      
                                    Lethal ramp-down            01/01/70 00:00      
                                       a funny thing happened ...            01/01/70 00:00      
                                          Brownout interrupts can be nice            01/01/70 00:00      
                                 RESET is not germane to this thread            01/01/70 00:00      
      diode in reverse bias (from output to input)            01/01/70 00:00      
         The best way to pass the ce testing...            01/01/70 00:00      
      High frequency ripple            01/01/70 00:00      
         Use a LRC-lowpass-filter!            01/01/70 00:00      
            What kind of L in the filter?            01/01/70 00:00      
      Big caps at output were used in the past            01/01/70 00:00      
         They used large L in the input in the past, too            01/01/70 00:00      

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