TPS7A8300: PGOOD

Ashutosh Nahar

Part Number: TPS7A8300
Other Parts Discussed in Thread: TPS65261

Hi,

I am using this part to generate 1.6V supply. To what voltage I need to pull up this PG pin?

If I need to pull up on 1.6V then my all other PGOOD are at 3.3V Then how should I tie all my PGOOD signal to generate the system

generate the system PGOOD(combination of all PGOOD).

Thanks

Ashu

over 8 years ago

0 Ryan Eslinger over 8 years ago

TI__Guru 55940 points

Hi Ashu,

PG is open drain and can be tied to a higher signal than Vin so long as it remains within the Abs Max voltage for PG. You should not have any issues with it tied to 3.3V.

Very Respectfully,
Ryan

0 Ashutosh Nahar over 8 years ago in reply to Ryan Eslinger

Intellectual 640 points

Hi,,
I am using TPS7A8300RGWR having input 2.0V to 1.6V and PG pin for this mention as 0.875Vout (page 7 of datasheet).
I am also using TPS65261 havng input 12V and output 2V,2.2V and 5V and PG mention as 35%of Vref(page 7 of datasheet).

Can i tie both the PG to 3.3V external? It will not create any problem .

Thanks
Ashu

0 Ryan Eslinger over 8 years ago in reply to Ashutosh Nahar

TI__Guru 55940 points

Hi Ashu,

Both devices have open drain power good signals; therefore, you will not have an issue with wire ORing the PGs together.

Very Respectfully,
Ryan

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TPS7A8300: PGOOD