TPS7B63-Q1: Regarding the value of Power-good threshold

rui saito

Part Number: TPS7B63-Q1

Hi team
I have a question regarding the power-good threshold.
If Vin gradually decreases and the Vout voltage cannot be maintained at 5V,will V(PG_TH) change?

Or can it be calculated using the formula below even if Vout decreases?
V(PG_TH)=5V(±2%)*(89.6%~93.6%)

over 1 year ago

0 Erin Thibeault over 1 year ago

TI__Expert 6570 points

Hi Rui,

I will check this and get back to you.

BR,

Erin

0 rui saito over 1 year ago in reply to Erin Thibeault

Prodigy 250 points

Hello Erin-san

Thank you for your response.
When can I receive an answer to this matter?
I would like to know the schedule.

0 Kai Nomiyama over 1 year ago in reply to rui saito

TI__Expert 5565 points

Hi Erin,

TPS7B63xx-Q1 output voltage is 3.3V or 5V fixed VOUT so default PG_TH(PGADJ pin shorted to ground) is optimized for 3.3V or 5VOUT, right?

in that case, combination of V(PG_REF) and PGADJ(intrnal resistor divider) shoud be fixed design so I think following Rui-san's comment is correct.

V(PG_TH)=5V(±2%)*(89.6%~93.6%)

Can you please review above?

Regards,

Kai

0 Erin Thibeault over 1 year ago in reply to Kai Nomiyama

TI__Expert 6570 points

Hi Kai and Rui,

Apologies for the delay here.

Rui-san's comment is correct.

BR,

Erin

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TPS7B63-Q1: Regarding the value of Power-good threshold