PMICLOADBOARDEVM: TPS6594_Q1 Low temperature failure

Yu LIU

Tool/software:

Dear TI Support,

Follow the datasheet, the device temperature grade :-40°C to +125°C.

If the ambient temperature is lower than -40°C, what abnormal failure will TPS6594_Q1 have? Will it cause the system to shut down all digital outputs, external voltage rails, and monitors and enter a safe recovery state after a self-test exception?

When we start the low temperature pressure measurement, we find there are occasional PMIC failures. the PIN status follow:

EN_DRV LOW

GPIO9 PGOOD LOW

GPIO2 LOW

nRSTOUT LOW

When the temperature returns to around 20°, the problem will be fixed. Can we determine that the PMIC is abnormal based on these PIN states? What is the minimum operating temperature of this PMIC?

over 1 year ago

0 Katie Pier over 1 year ago

TI__Guru* 83421 points

Thank you for your inquiry. US and Europe TI offices are closed on April 18th. This thread has been assigned but you will receive a response early next week. Thank you for your patience!

Regards,

Katie

0 Yu LIU over 1 year ago in reply to Katie Pier

Prodigy 10 points

Hello Katie,

Good morning, any feedback for me?

0 Yu LIU over 1 year ago in reply to Katie Pier

Prodigy 10 points

Hello Katie,

Still wait for your feedback.

0 Nicholas McNamara over 1 year ago

TI__Mastermind 23381 points

Hello Yu,

This line in the datasheet says guarantees device operation from the -40C to 125C.

Depends, what is the part number associated with this line of questioning?

Often many times the TPS6594 is the key component in fault handling so a failure to output from the PMIC may not necessarily be caused by the PMIC but rather a handling of an error associated with the PMIC.

Is it possible after the recovery from 20 C that a register readback can be performed? Registers 0x5A to 0x6C of the base device address, these are the interrupt registers and can give more detail as to why there was fault handling.

BR,

Nicholas McNamara

Power management

Power management forum

PMICLOADBOARDEVM: TPS6594_Q1 Low temperature failure