TPS548D22: Which description is correct?

Koyo Asaishi

Intellectual 1930 points

Part Number: TPS548D22

Hi team,

According to the datasheet page3, RESV_TRK shouldn't be connected to any components.
However, ceramic capacitor(C46) is connected to REFIN_TRK which is different name but same pin number on a EVM.

Should I connect capacitor or not to RESV_TRK?

One concern is TPS548C22RVF is described on page 4 of EVM user guide.

Best regards,
Koyo

over 5 years ago

0 Anthony F over 5 years ago

TI__Mastermind 35165 points

Hi Koyo-san,

The description for pin 37 (RESV_TRK) should be left floating as described in the datasheet. The user's guide needs to be updated. Please see the related threads below.

https://e2e.ti.com/support/power-management/f/196/t/813967

https://e2e.ti.com/support/power-management/f/196/t/747960

https://e2e.ti.com/support/power-management/f/196/t/633665

I also checked the part number in the BOM for the EVM and verified it is actually the TPS548D22RVF, not C22 listed in the user's guide. I believe this error was introduced because the part number was changed during the development and was not updated correctly everywhere.

Let me know if you have any further question.

Anthony

0 Koyo Asaishi over 5 years ago in reply to Anthony F

TI__Intellectual 1930 points

Hello Anthony,

Thanks for the clear answer.
I understand RESV_TRK should be unconnected.

Best regards,
Koyo

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TPS548D22: Which description is correct?