Post Go back to editing

# (ADR3533)What will happen if Vout short to GND?

Hi !

Our customer are asking me this question.

Q1)

What will happen if Vout short to GND?

Would it broke the device?

Or would it be no problem?

Q2)

If the device will broke, can you explain why the device will broke?

If the device won't broke can you explain why the device won't broke?

VIN=5V

ENABLE=5V

GND_SENSE=0V

GND_FORCE=0V

VOUT_SENSE=0V

VOUT_FORCE=0V

Best regards.

Kawa

Parents
• Hi Kawa-san,

I need to verify this question to the person who knows the device structure. But to give you some inputs, the current output of the device will be maximum when the output is shorted to ground. ADR3533 has max current source of 10 mA while some datasheets also shows short circuit to ground value but that is not necessarily the same. Will the device break? it depends on how long and how frequent , some of our references datasheet specify the short circuit to ground duration or how long will it able to survive when shorted to ground in the absmax section , some datasheets say "indefinite".

Other way to look at this is to make sure we don't violate the absmax. If VIN is 5 volts and let say current out is 10 mA. Then we have 50 mW. Theta-JA of 8 lead MSOP is 132.5 degC/W. Then we will have rise in junction temperature of approximately 7 deg. If we add this number to your ambient temperature, the result should be in the range of the junction temperature range, for ADR3533 it should not be more than 150 degC max.

I would  appreciate if you could share what is your customer application is and what is the nature of the short to ground event? How long, how often and why will it happen?

Regards,

Phil

• Hi Kawa-san,

I need to verify this question to the person who knows the device structure. But to give you some inputs, the current output of the device will be maximum when the output is shorted to ground. ADR3533 has max current source of 10 mA while some datasheets also shows short circuit to ground value but that is not necessarily the same. Will the device break? it depends on how long and how frequent , some of our references datasheet specify the short circuit to ground duration or how long will it able to survive when shorted to ground in the absmax section , some datasheets say "indefinite".

Other way to look at this is to make sure we don't violate the absmax. If VIN is 5 volts and let say current out is 10 mA. Then we have 50 mW. Theta-JA of 8 lead MSOP is 132.5 degC/W. Then we will have rise in junction temperature of approximately 7 deg. If we add this number to your ambient temperature, the result should be in the range of the junction temperature range, for ADR3533 it should not be more than 150 degC max.

I would  appreciate if you could share what is your customer application is and what is the nature of the short to ground event? How long, how often and why will it happen?

Regards,

Phil

Children
No Data