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Jim Granville
06/11/13 19:53
Read: 997 times


 
#189928 - LR8K4 450V regulator
Responding to: Mikkel C. Simonsen's previous message
Mikkel C. Simonsen said:
Jim Granville said:
Mikkel C. Simonsen said:

With no ┬ÁC installed, the consumption (voltage regulator) is 0.21mA.


... buy a better regulator ?

A regulator that uses less than 0.21mA? I don't think I can get one. Almost all the "waste" is in the 6k04/18k2 voltage setting network. A regulator that tolerates high input voltages is needed, and the LR8 that I use is one of the very few available.


Oh, 450V was not mentioned before, that I saw.... LR8K4 is a nice part.

For this, I'd add a PDZ5.1 or PDZ5.6 Zener, so you can be less strict about minimum load. (on PDOWN tests, you will need to watch out for too-low Icc)
and I'd allow the system to tolerate uC Icc of Zero.

You can drop the bias current, and use the Zener as Min load coverage, if you do not mind relaxing tolerance.


List of 44 messages in thread
TopicAuthorDate
Low-power MCU needed      Mikkel C. Simonsen      06/09/13 13:58      
   OK, but wrong      Erik Malund      06/09/13 15:33      
      Wrong how?      Mikkel C. Simonsen      06/09/13 16:30      
         Silabs options      Jim Granville      06/09/13 16:53      
            C8051F99x      Maarten Brock      06/10/13 13:06      
               Silabs      Mikkel C. Simonsen      06/10/13 17:17      
                  look it up      Erik Malund      06/10/13 19:28      
                     Looked up      Mikkel C. Simonsen      06/11/13 16:26      
                        f53, no      Erik Malund      06/11/13 17:37      
                        C8051F537A is OK      Jim Granville      06/11/13 19:31      
         the current in active mode is not the issue      Erik Malund      06/10/13 05:30      
            Inactive current      Mikkel C. Simonsen      06/10/13 16:41      
         re: wrong      Jacob Boyce      06/10/13 06:56      
            Consumers      Mikkel C. Simonsen      06/10/13 09:54      
   Zilog Z51F0410       Jim Granville      06/09/13 16:46      
      Zilog      Mikkel C. Simonsen      06/10/13 17:01      
   Check you are entering idle ?      Jim Granville      06/09/13 16:48      
   idle current      Jan Waclawek      06/09/13 22:27      
      Idle test      Mikkel C. Simonsen      06/10/13 10:57      
         re:      Jacob Boyce      06/10/13 13:10      
            It floats! It floats!      Mikkel C. Simonsen      06/10/13 14:18      
               re:floats      Jacob Boyce      06/10/13 14:52      
               re:floats      Jacob Boyce      06/10/13 15:10      
                  Timers      Mikkel C. Simonsen      06/10/13 15:27      
         More idle tests      Jim Granville      06/10/13 19:33      
            Better regulator?      Mikkel C. Simonsen      06/11/13 18:19      
               LR8K4 450V regulator       Jim Granville      06/11/13 19:53      
         also try CLKREG      Jim Granville      06/10/13 19:47      
            Clk Dividers are a good idea      Jim Granville      06/11/13 01:03      
               No dividers      Mikkel C. Simonsen      06/11/13 18:11      
                  LP52 is cheaper too...      Jim Granville      06/11/13 20:04      
                     LP52      Mikkel C. Simonsen      06/17/13 20:24      
                        No GND pin?      Maarten Brock      06/18/13 11:34      
         re:idle      Jacob Boyce      06/11/13 13:30      
         Totally idle      Mikkel C. Simonsen      06/11/13 16:22      
            Checks      Jim Granville      06/11/13 16:33      
               More checks      Mikkel C. Simonsen      06/11/13 18:00      
                  Power Down ?      Jim Granville      06/11/13 18:59      
                  test setup      Jacob Boyce      06/12/13 08:33      
   STC      Mikkel C. Simonsen      08/17/13 18:22      
      C8051F86x/85x ?      Jim Granville      08/17/13 23:32      
      Maybe not such a good choice, after all?      Andy Neil      08/28/13 14:21      
         Support?      Mikkel C. Simonsen      08/28/13 14:31      
            '51 support      Erik Malund      08/28/13 15:49      

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