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TPS56428: TPS56428 and TPS54325 : Applying slow ramp voltage to EN pin

Part Number: TPS56428
Other Parts Discussed in Thread: TPS54325

Hi support team,

I have a question about the EN terminal of TPS54325 and TPS56428.
Our customer is going to design using TPS54235 and TPS56428 now.

1. How much is the hysteresis voltage of VEN (EN pin input voltage) of TPS56428?
I think it of TPS54325 would be 100 mV according to the following thread:

2. Since these ICs have hysteresis in VEN, can I consider that there is no problem to apply slow ramp voltage to EN pin?
For example, as ramp rate of voltage,
    about 6 ms from 0 V to VENH
    about 1515 ms from 8 V to VENL
The customer wants to set up an RC low pass filter on front of EN pin.

3.How much is the input impedance of the EN pin of the TPS54325?
The above thread states that there is a 350 kΩ pull-down on EN pin. Is that correct?
By the way, the datasheet of TPS56428 states that the EN terminal has a 350 kΩ (TYP) pull-down resistor.

Best regards,
M. Tachibana