newhand
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ldo heavy load
hi guys:
As an classical LDO,comprised by three stage:an high gain stage,a buffer stage and a output stage.A big cap is at the output and the esr is essential to the stability.
There are 2 poles and 1 zero in the loop.My question is when the loading is changing and the 2 poles will be changing and the dominant pole will be exchanged between the 2 poles,how to analysis the stability issue?
Can anyone help,thanks~~![Big grin :D :D](data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7)
hi guys:
As an classical LDO,comprised by three stage:an high gain stage,a buffer stage and a output stage.A big cap is at the output and the esr is essential to the stability.
There are 2 poles and 1 zero in the loop.My question is when the loading is changing and the 2 poles will be changing and the dominant pole will be exchanged between the 2 poles,how to analysis the stability issue?
Can anyone help,thanks~~