Best way to simulate max. peak current consumed by a circuit block

tenso said:

I am trying to design an LDO and in the process figure out the max current it has to supply (for pass device sizing) and the size of the cap I would need at the output. The LDO is supposed to provide the supply voltage for a previously designed block on my chip. What kind of simulation should I run on my on block (which will be the load ) to figure out Iload max? If I run a transient sim with a ideal voltage source for my block, would that give peak current consumed by the block or would that just give me the quiescent current? If I need peak current at startup, should the DC voltage be ramp voltage with a specific rise time?

How do people decide what the loading profile would like for the current being delivered by a LDO (or even switching regulator)?

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