TPS62130A: Any sequence limitation for PVIN and EN?

Hi Furuya-san,

Yes, per the abs max table EN cannot be above Vin.

As well, we have the newer, smaller TPS62135/6.

Hi Glaser-san,

From the datasheet, Pin voltage range is specified as VIN+0.3. I think it mean EN pin can accept Vin + 0.3.
So I cannot understand the reason why you mention EN cannnot be above Vin.
Could you show any other evidence on datasheet EN cannnot be above VIN?

Regards,
Furuya

Yes, it can be 0.3V above Vin and be within spec. For a real-world design, this is nearly the same potential as Vin.

Glaser-san

So, for the customer's case, please confirm again if case 1 and 2 is acceptable or no.

Case 1 : PVIN = High, EN = High -> Low -> High

Case 2 : EN = High, PVIN = High -> Low -> High

Case 1 is PVIN is high stable, so if EN High state voltage is same with PVIN, I think it should be acceptable.

But for Case2, EN is high stable, so when PVIN is Low(0V), the voltage gap between EN and PVIN is bigger than Vin+0.3V. So it violate the abs max spec.

Correct?

Regards,

Furuya

Hi Furuya-san,

I think the limit on the EN pin voltage is very clear in the D/S. What is not clear is what is meant by 'high' and 'low'. What voltage levels do these correspond to?

Yes, that is correct.