I'm having an issue with power on PCB, don't know how to stabilize it.
I have single 12V DC source and i need to power:
1. 12V Device (static current around 80mA, don't know during the max. Might be up to 150-200mA )
2. 5V buck converted
3. From those 5V i power Relay (typical from 70mA up to max 150)
4. From those 5 V i power linear voltage regulator for 3.3V lm1117
5. From 3.3V i power up MCU (draw around 120 up to absolute max 500mA)
6. Another 12V device which also have a coil (up to 200mA when it kicks)
Is there a way to stabilize powering device under, especially under 6.? Everything is on PCB so, might make some problems.
Or i would be enough to have proper main source with 2-3A adapter?
I have single 12V DC source and i need to power:
1. 12V Device (static current around 80mA, don't know during the max. Might be up to 150-200mA )
2. 5V buck converted
3. From those 5V i power Relay (typical from 70mA up to max 150)
4. From those 5 V i power linear voltage regulator for 3.3V lm1117
5. From 3.3V i power up MCU (draw around 120 up to absolute max 500mA)
6. Another 12V device which also have a coil (up to 200mA when it kicks)
Is there a way to stabilize powering device under, especially under 6.? Everything is on PCB so, might make some problems.
Or i would be enough to have proper main source with 2-3A adapter?