TPS7H5001-SP: Timing for EN pin

Brian Bubnash61

Prodigy 200 points

Part Number: TPS7H5001-SP

Can you provide more detailed timing information for the device EN pin? Specifically:

What is the min negative-going pulse duration required to disable the device via EN?
What happens if a negative-going pulse is applied to EN that is too short? For instance, could you get weird intermediate states like the SS capacitor being only partially discharged, or is there internal logic designed to prevent this from happening?

over 3 years ago

+1 Wade Vonbergen over 3 years ago

TI__Guru 62930 points

Brian,

The engineer that normally supports this device is out of the office.

Let me check with our design team and see if I can get you answers in the meantime. Hopefully can have information in a couple days or less.

Regards,

Wade

0 Wade Vonbergen over 3 years ago in reply to Wade Vonbergen

TI__Guru 62930 points

Brian,

I was able to get some information from the design team.

We do not have a specific test case that showed the minimum duration for the disable transition. However, we do have data for the EN timing. This ranges from 400ns to 1.2us.(edited)

Additionally, if the circuit detects the disable (EN=low) condition, soft start will fully discharge even if EN goes back high.

Hopefully this is enough information to help you.

If this answers your question, please click this resolved my question.
Regards,
Wade

0 Wade Vonbergen over 2 years ago in reply to Wade Vonbergen

TI__Guru 62930 points

Brian,

I thought the timing was a little off, so double checked. There was a typo in the data.

The correct range is 400ns to 1.2uS. I will edit the post to be the correct value.

Thanks,

Wade

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TPS7H5001-SP: Timing for EN pin