 |
 |
| View previous topic :: View next topic |
| Author |
Message |
CMatic
Joined: 11 Jan 2012
Posts: 69
|
|
 Posted: Fri Nov 13, 2015 6:40 am |
 |
|
| wangine wrote: | | CMatic wrote: | | Ttelmah Your reply has enlightened me and I had never read this great of explanation about MCLR, really thanks so much. And I hope everyone on this forum reads it and take note of it. Especially how you described about cell’s being erased and using a diode to protect it. Could you please also suggest the super low uA regulator part number that I can use in my design. |
I notice that long time ago, _Ttelmah_ always is on the point , like other here, him want to say to avoid linear regulators if you want low uA, the problem of linear regulators , drop much current when the difference voltage between in/out is large. then better to use high efficiency converters topology (buck) , or (step_down) , some are designed on 99% + efficiency , sure about each developer can take entire day. Personally for my projects i get from here , is cheap and enough good to do the job. http://www.aliexpress.com/item/RC-Airplane-Module-Mini-360-DC-Buck-Converter-Step-Down-Module-4-75V-23V-to-1V/32404644438.html?spm=2114.01020208.3.21.zYFoOO&ws_ab_test=searchweb201556_1_21_79_78_77_92_91_22_80,searchweb201644_5,searchweb201560_9
or
http://www.aliexpress.com/item/Free-shipping-LM2596-Power-Module-DC-DC-Buck-Converter-Step-Down-Module-LM2596-High-Quality-Wholesale/32363769998.html?spm=2114.01020208.3.11.zYFoOO&ws_ab_test=searchweb201556_1_21_79_78_77_92_91_22_80,searchweb201644_5,searchweb201560_9
can search on google and you will find alot of informations about BUCK.
Good luck and don't forget to put SOLVED in your topic title
edit: I forgot to say, in the links is an adjustable model but to get more low uA drop try to search the fixed regulators, the adjustable use a divider resistors or pot and that can take some current, with fixed point like 5.0 the IC deal with internal reference. |
Thanks again wangine your suggestions are well noted. |
|
 |
CMatic
Joined: 11 Jan 2012
Posts: 69
|
| SOLVED! |
| Posted: Fri Nov 13, 2015 6:42 am |
|
|
| Ttelmah wrote: | | For a linear regulator, look at chips like the NCP702, LM2936, & the Motorola (On Semi now) 78LCxx. The latter is very nice, and has less tendency to oscillate when the load drops than many regulators. However still up at about a uA quiescent. It's worth putting things into perspective though. If you can get your total current down to just 10uA, then a pair of alkaline AA batteries can run it for about 10000 days!.... You are limited more by the shelf life of the battery, than by the power the circuit uses. |
I will check these out very soon specially 78LCxx. Thanks so much |
|
|
wangine
Joined: 07 Jul 2009
Posts: 98
Location: Curtea de Arges, Romania
|
|
| Posted: Fri Nov 13, 2015 8:18 am |
|
|
aaa. Actually to put SOLVED in your topic title it is possible only if you edit your first message posted in the topic, there are the title too.
Anyway the intention was nice, have a nice day  |
|
|
guy
Joined: 21 Oct 2005
Posts: 297
|
|
| Posted: Fri Nov 13, 2015 1:48 pm |
|
|
To reach the datasheet current consumption you will have to avoid unused floating pins - either pull them up/down or turn them to outputs.
All peripherals that were turned on must be turned off, etc. |
|
|
|
|
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum
|
Powered by phpBB © 2001, 2005 phpBB Group
|
FAQ 
Search
Register
Profile 
Log in to check your private messages 
Log in
