I have used LP3961 3.3V regulator cicuit for my Atmega microcontroller circuit. I have implemented low power sleep mode. Micro controller consumed 25uA itself. When I Measured the current consumption of whole circuit with regulator, It was 3.5 mA. I don't understand why the regulator takes much current than microcontroller. Do anyone know the reason?
1 Like
Post a schematic and images of the project, please.
Can you show it? (LP3961 3.3V regulator circuit for my Atmega microcontroller circuit.)
1 Like
Well i guess there must be a minimum current it will supply. If there would be no-current, it would still consume some unless force it to shut-down. but you can do that if you just want the MCU to sleep. I've looked through the datasheet and actually did not find a minimum operating current anywhere, but 3.5mA seems quiet reasonable.
Look at the LP396x datasheet.
"Typical ground pin current" (idle current) in normal operating mode is 3mA (max 9mA).
Leo..
This topic was automatically closed 180 days after the last reply. New replies are no longer allowed.