Please tell me about TPS54310.

Pokkun

Genius 4695 points

Other Parts Discussed in Thread: TPS54310

Hello.
My customer is currently in using TPS54310,now.
I have gotten a question about this product .

So, Please tell us about this product.

＜Question＞

When the TPS54310's power supply voltage will start too slowly, it will be this waveform.

For this waveform.

when this device starts to output, this device's PGOOD Circuit has not yet been successfully behavior,

so it can't drive to "Low Level".

Is this recognition correct ?

Best Regards,
Masumi Sekiguchi

over 9 years ago

0 JohnTucker over 9 years ago

TI__Guru**** 191445 points

I can't see the time scale in your waveform, but it is probably correct. You have a fast SS time relative to the slowly rising VIN. It looks like there is a window where Vout is regulating relative to the non inverting input allowing PGOOD to go high. Try increasing the SS time to see if this behaviour goes away.

0 Pokkun over 9 years ago in reply to JohnTucker

Genius 4695 points

Thank you for the answer!

Is this operation reasonable from the point of view of the device's design?

(Yes or No)

Power management

Power management forum

Please tell me about TPS54310.