LDO design help cadence

[moonstone2006]

Dear all,
I aM new in LDO simulation i really dont know how to use cadence in getting the transient response of LDO any help

 

[LvW]

Dear all,
I aM new in LDO simulation i really dont know how to use cadence in getting the transient response of LDO any help

What really is your problem? When you have the circuit diagram and if you know how to handle the program - what else do you need ?

 

[moonstone2006]

What really is your problem? When you have the circuit diagram and if you know how to handle the program - what else do you need ?

the problem is i have the cct diagram but i dont know how to make the transient analysis in cadence i mean where to put the source and what it is kind

 

[LvW]

the problem is i have the cct diagram but i dont know how to make the transient analysis in cadence i mean where to put the source and what it is kind

If you know the task (to regulate a varying voltage) and the function of an LDO it should be clear that you have two interesting cases:
How does the circuit respond to a step change
* of the incoming voltage (to be regulated),
* of the load (decrease and/or increase).

The step response at the output is the desired transient.

 

[moonstone2006]

so i should put a pulse current at the output ?? and check the input or put a pulse at input and check the output i mean i dont know how to put different load or dynamic load

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thats my design how to test it in ac and in transient