TPS7A69-Q1: What's the influence if VEN and VSO are over Vout?

Wenting Wu

Part Number: TPS7A69-Q1

Tool/software:

Hello Expert,

My customer is using TPS7A69-Q1. The 2nd level power has a leakage current which can cause VEN (3.38V) and VSO are over Vout=3.3V. Are there some risks?

over 1 year ago

0 Wenting Wu over 1 year ago

TI__Intellectual 2295 points

Sorry, It's VPG and VSO not VEN.

0 Hannah Grace over 1 year ago

TI__Genius 15125 points

Hello,

Thank you for your question.

As these are the absolute maximum ratings for each pin, by hitting over the maximum voltage for the PG and SO pin you could be at risk of damaging the device.

The device may not work according to its designed functionality.

Best,

Hannah

0 guo kang over 1 year ago in reply to Hannah Grace

Prodigy 30 points

Hannah and wending,

We see that the "Recommended Operating Conditions" said the PG and SO can withstand 5.5V, and we have test the V-I curve of PG and SO Nmosfet and find the max voltage is 12V. So we wonder the 3.8V PG & SO is also unsafe?

And the TPS7A69 datasheet covers the FIX-3.3V and FIX-5.0V, maybe that two MPN have the same Nmosfet design of PG and SO.

https://e2e.ti.com/support/power-management-group/power-management/f/power-management-forum/1393680/tps7a69-q1-pg-and-so-pin-overvoltage

0 Hannah Grace over 1 year ago in reply to guo kang

TI__Genius 15125 points

Hello,

I see how this can be confusing. I did not get a change to look at the recommended operating conditions.

We recommend keeping to the absolute maximum table specs as the SO pin is connected to VOUT through a pullup.

Therefore, please use the abs max table ratings of not exceeding VOUT for the PG and SO pin.

Hope this helps to clarify things.

Best,

Hannah

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TPS7A69-Q1: What's the influence if VEN and VSO are over Vout?