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LTM4644 IC power good is not getting

Category: Hardware
Product Number: LTM4644

Dear Sir/Madam,

In one of our design we are using LTM4644 regulator.

we are giving input as 5v and expecting outputs are 2.5v @ 8A and 1.0v @8A.

Here we are connecting RUN pin to 5V.Here problem is getting outputs perfectly but PGOOD signal is not going High.

PGOOD signal for Pulled up to INTVCC  with 100K resistor.

so we are connecting this PGOOD signal to another regulator RUN/EN signal....

So please help us to get PGOOD...and let me the solution as early as possible.