TLV810: TLV810R output drops when its VCC drops

Wayne Wang20

Part Number: TLV810

Hi team,

My customer is testing TLV810R. The schematic is as below:

Below picture is the waveform(Yellow=VCC, Green=/EN). When VCC is stable@5V, /EN=0V. However, when there's a slight drop(around 0.5V) on VCC, /EN will also show a slight drop. And the drop on /EN makes it output a negative voltage.

We also tried to remove R418 but the test result is the same

Could you please help analyze why /EN will drop here? Thanks.

Best regards,

Wayne

over 4 years ago

0 Abhinav.Sharma over 4 years ago

TI__Genius 9375 points

Hi Wayne, could you try to test with removing R339?

Thanks,
Abhinav.

0 Wayne Wang20 over 3 years ago in reply to Abhinav.Sharma

TI__Expert 4360 points

Hi Abhinav,

Customer has tried to remove R339 but the output still has a negative spur when Vcc drops. So could you please help try this test on our EVM to see if this behavior is related to TLV810 itself? Thanks.

Best regards,

Wayne

0 Abhinav.Sharma over 3 years ago in reply to Wayne Wang20

TI__Genius 9375 points

Hi Wayne,

Testing in our labs is currently restricted due to the site being shutdown related to coronavirus. Is this an urgent request/do you have the capabilities to test?

Thanks,
Abhinav.

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TLV810: TLV810R output drops when its VCC drops