TPS62136: TPS62136 Power Good

user6049718

Part Number: TPS62136

Will Power Good stay low all the time during power-down? Or just like the below table, when Vin drops below 0.7V, PG Logic Status is high impedance？

over 6 years ago

0 user6049718 over 6 years ago

Prodigy 95 points

Could you share some wave forms during power-down with Vin, Vout and PG? I want to use PG as a reset to a MCU.

0 Dorian Brillet de Cande over 6 years ago in reply to user6049718

TI__Genius 14876 points

Hello user,

To have control over the logic of PG pin, VIN must remain present otherwise it cannot force the PG pin to stay low. As the device stops switching when Vin<Vuvlo, PG voltage will refer to Vout which will be discharged, so PG will be close to 0V..

Thank you very much!

Best Regards,
Dorian

0 user6049718 over 6 years ago in reply to Dorian Brillet de Cande

Prodigy 95 points

In datasheet Equation 10, is it mean Ton=100ns? Ton is not always 100ns with different Vin and Vout in Equation 10. Dose it calculate from Equation 1?

0 Dorian Brillet de Cande over 6 years ago in reply to user6049718

TI__Genius 14876 points

Hello,

Yes you can calculate Ton with Equation 1 in PFM & PWM. An absolute minimum on-time of about 50ns is applicable when in Power Save Mode.

Thank you very much!

Best Regards,

Dorian

0 Dorian Brillet de Cande over 6 years ago in reply to Dorian Brillet de Cande

TI__Genius 14876 points

Hello,

I haven't heard back from you. Do you have any further questions on this topic?

Thank you very much!

Best Regards,

Dorian

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TPS62136: TPS62136 Power Good