LM5050-1: When off pin give 3.3v why output still have 0.285v

Hi Eddie,

When FET is OFF, we should get Vout = Vin - body diode drop.

Are you seeing something different ?

Best Regards,

Rakesh

Hi Expert,

I means when I give the off pin high voltage and means FET off right now.

Actually i will see the out put should be 0V , but why i see that have 0.285V still have a little bit voltage on there ?

Do you have any idea or this is normal ?

Eddie 

can you please mark where you are measuring 0.285V on the schematic and share us

Hi Expert ,

we see that on Vout pin to gnd.Thanks !

Please help to comment ASAP.

Eddie

Hi Eddie,

Is this the scenario ? Vin = 0V, OFF=3.3V and you are seeing leakage on Vout = 0.285V

pls confirm to check with the designer

BR,

Rakesh

Hi Expert,

Yes, as you red line mentioned so my customer want to know why there still has 0.285V

do we have any document or data to explain it.

Eddie

Hi Eddie,

We have not seen such issue.

0.285V is so low. Is it a concern in the customer system ?

BR,

Rakesh

Hi Expert,

Yes , they just curious why will see that ? and wonder to know any side effect or risk from our point of view.

Could you have any idea or comment about this case ?

Eddie

Hi Eddie,

There would not be any risk with such low voltage.

we will cross-verify at our end on EVM and discuss with the designer for the reason.

Best Regards

Rakesh