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???
11/06/09 12:48
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 		 #170496 - Unstable supply?
Responding to: ???'s previous message
Input voltage will not go below 5 volts. The drop-out voltage should be 1.5 volts to 2 volts for my circuit to work. Even if I get 3 volts (or even 2.7 volts, for 8051F340), things should be fine, or at least, this was what I was thinking. So you think I should switch to LM 1086 ? Maximum current drawn is 200 mA. If the LM317 that I am using requires higher differential, would it cause the output to drop, or would it get unstable?

List of 30 messages in thread
TopicAuthorDate
C2 debugger interface resets when ground pin is touched            01/01/70 00:00      
   Flash operations            01/01/70 00:00      
      one point            01/01/70 00:00      
         WDT and flash            01/01/70 00:00      
            do you have a 4 layer board, is the PC and ...            01/01/70 00:00      
               GSM modem, not PC..            01/01/70 00:00      
                  Floating signals            01/01/70 00:00      
                  PC "ground" loop?            01/01/70 00:00      
                     That is a good point!!            01/01/70 00:00      
                  Perhaps you should "AC-couple" signal GND to "earth"            01/01/70 00:00      
   Maybe your compy USB is flakey?            01/01/70 00:00      
      apples and oranges            01/01/70 00:00      
   No surprise at all!            01/01/70 00:00      
      Actually, it resets when I am nowhere near it also.            01/01/70 00:00      
         Unfortunately,...            01/01/70 00:00      
         Section 11.3 of the datasheet            01/01/70 00:00      
            known as 'design specifications'            01/01/70 00:00      
               Another clarification..            01/01/70 00:00      
               Design specs eh            01/01/70 00:00      
                  which is ridiculous and "asking for it"            01/01/70 00:00      
                     SICKLabs...            01/01/70 00:00      
                     /RST cap            01/01/70 00:00      
   Your power supply looks instable?            01/01/70 00:00      
      Unstable supply?            01/01/70 00:00      
         Supply            01/01/70 00:00      
            wrong approach            01/01/70 00:00      
         good catch AP            01/01/70 00:00      
      Indeed!            01/01/70 00:00      
      An easy test            01/01/70 00:00      
         oh, but it does            01/01/70 00:00      

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