can PG pin of ST1L08SPU33R be left floating if unused?

[shubhangi]

can PG pin of ST1L08SPU33R be left floating if unused?

Datasheet does not specify it.

[Peter BENSCH]

Welcome @shubhangi, to the community!

It is indeed mentioned a little hidden. However, the data sheet, table 4, states Isink = 6 mA open drain output for PG. This pin is therefore an open drain output and can therefore remain completely unconnected.

Hope that answers your question?

Regards
/Peter

[shubhangi]

Hi Peter,

Thank you for your response. It indeed is hidden. :) 

If I want to use this pin, I assume, I will have to pull-this up. Which voltage rail should it be pulled-up to?

Thanks,

Shubhangi

[Peter BENSCH · Accepted solution]

This is also stated in the data sheet, table 2: VPG = -0.3V ... VBIAS+0.3V. So, pull it to VBIAS.

Good luck!
/Peter

[shubhangi]

Thanks Peter.

Regards,
Shubhangi

[shubhangi]

Hello Peter,

Can this IC ST1L08SPU33R handle 3.3V input? i.e. convert 3.3V to 3.3V?

Actually I have a case where input can be either 3.3V or 5V. 5V to 3.3V can work. How about 3.3V to 3.3V?

Thanks,

Shubhangi

[Peter BENSCH]

Well, it is an ultra low drop regulator, but there is still some dropout voltage: the data sheet mentions max 120mV for the whole temperature range, in your case resulting to 3.18V.

[shubhangi]

Hi Peter,

Yes Thats expected. I think 3.18V should work. Thanks.

Thanks,
Shubhangi