OPA2209: Power dissipation

Hi Austin, 

Austin Do said:

My customer plans to use multiple OPAMPs and wants to expect the power dissipation in both AC and DC input in order to select right LDO.

LDO is a constant voltage source, and the amount current drew is determined by a load that connected to its output. Typically, the power requirements in LDO is 2-3X or higher than the required overall current  or power in the op amps' application (you have to take into account temperature factors and design margins). 

Austin Do said:

Is there a recommended simulation tool to calculate this?

Yes, most simulation tool is able to able to calculated. Typically, it is estimated, since >2-3X total power power consumption is considered. 

If you want to know exact power consumption, we can simulate it. But you need to provide me with the complete schematic, where I need to know input and output voltage and current, waveform types and gain of a circuit.  If I have these operating parameters, I can simulate it for you and show you how to calculate these power requirements. 

Best,

Raymond