TPS62085: Vin to SW positive and negative voltage spec

Hi Jim,

Are you referring to the ABS max ratings for VIN and SW? You can find this in section 7.1 of the datasheet.

Best regards,

Varun

Hi John,

What I need is Vin to SW ABS max and min spec. Customer measure high side MOSFET Vds and would like to know whether the result in spec.

Hi John,

Got it.

How about VIN to SW (HS FET) negative voltage spec?

Customer measured negative voltage is -0.89V, if use below spec, the test result is fail.

Do we have AC spec same as SW (LS FET) -3V 100ns? 

Hi Jim,

The -3V AC spec for SW is valid for min/max VIN. Is the measured -0.89V on SW with respect to GND? And is it an AC spike? If yes I don't see this as a problem. As there will a voltage drop across the body diode of the LS FET during commutation from LS FET to HS FET

Best regards,

Varun

Hi John,

-0.89 is measured on VIN to SW.

So I can use -3V 100ns for VIN to SW negative spec, right?

Hi John,

-0.89V is measured on VIN to SW.

So I can use -3V 100ns for negative spec, right?