TPS79301-EP: Output greater than input

Abigail Leonardi

Part Number: TPS79301-EP

Tool/software:

Hi,

I have a customer who is looking to understand what will happen when the output of the TPS79301 is raised about the input voltage.

If current conducts back to the input, what would the reverse bias voltage be?

Thank you!

1 month ago

0 Hannah Grace 1 month ago

TI__Genius 10730 points

Hello,

Thank you for your question.

If the input goes above the output by 0.3V, then you can exceed the absolute maximum rating for this device, which could cause damage to the device.

Additionally, the device will not regulate as expected without the necessary headroom between input and output.

I will ask about the reverse bias voltage.

Thank you,

Hannah

0 Abigail Leonardi 1 month ago in reply to Hannah Grace

TI__Intellectual 1705 points

Hi Hannah, thanks for your initial answer! To clarify you first statement, do you mean when the output exceeds the input by 0.3V?

Also, please let me know when you have more information about the reverse bias voltage, thank you!

0 Hannah Grace 1 month ago in reply to Abigail Leonardi

TI__Genius 10730 points

Hi Abigail,

Yes, I mean when the output exceeds the input by 0.3V, sorry for the confusion.

I am still gathering more information about the reverse bias voltage.

Thank you for your patience.

Best Regards,

Hannah

+1 Hannah Grace 1 month ago in reply to Abigail Leonardi

TI__Genius 10730 points

Hi Abigail,

There is no reverse current protection for this device, so we do not recommend testing the reverse current condition as this could damage the device.

Since the parasitic diode is a diode, you would see the same reverse bias voltage as a normal diode over temperature, between 0.3V to 0.7V.

Hope this helps!

Best Regards,

Hannah

0 Abigail Leonardi 27 days ago in reply to Hannah Grace

TI__Intellectual 1705 points

Hi Hannah,

This helps, thanks for your insight!

0 Hannah Grace 27 days ago in reply to Abigail Leonardi

TI__Genius 10730 points

Absolutely! I will go ahead and close this thread out.

Please let me know if you have any questions or concerns.

Best,

Hannah

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TPS79301-EP: Output greater than input