Common Ground?

Vishal Kakade

Intellectual 930 points

Other Parts Discussed in Thread: PMP10532

Hello Sir,

I am designing a power rail where I have multiple power rails.

1V, 1.2V, 1.8V, 3.3V etc.

plus I have operational amplifiers on my board for which I need a dual supply (+-12V, +-7.5V).

I want to to know how ground connections are done?

means I have to connect all power rails ground to (negative supplies ground?).

please clarify this and please share some regulators which can give (+-12V, +-7.5V). supply with very less ripple.

Thanks and Regards

Vishal Kakade

over 5 years ago

0 Arief Hernadi over 5 years ago

TI__Mastermind 23815 points

Hi,

Are you thinking in similar fashion as this?
http://www.ti.com/tool/PMP10532.2

It all depends on your input voltage, and what current output that you need. Also you need to add LDO for your rails that need a low noise/ ripple supply

Thanks
-Arief

0 Vishal Kakade over 5 years ago in reply to Arief Hernadi

Intellectual 930 points

Hello Sir,

Yes, My question is, I have many other voltage rails too. Will their ground be all same?

0 Arief Hernadi over 5 years ago in reply to Vishal Kakade

TI__Mastermind 23815 points

Yes, unless you are using an isolated topology

Thanks
-Arief

Power management

Power management forum

Common Ground?