LMR14030: Error scenarios for LMR14030

Sandeep Tammana

Part Number: LMR14030

Hello,

We are using LMR14030SDDAR in our design for generating 4.3V.

Could you please provide your feedback on the below two queries on LMR14030SDDAR related to the FMEA (Open point during the review with OEM).

What is the error scenario when the Rfbt is open. How much will be the output voltage?
What is the error scenario when RT is open

Thank you for your support,

Best Regards,

Sandeep Tammana

0 Gavin Wang (Zejing) over 4 years ago

Hi Sandeep,

See answers below:

When the Rfbt is open, the output voltage is related to Vin and maximum duty cycle. The value will be 97%Vin.
The RT/SYNC pin can’t be left floating or shorted to ground. If you do that, IC will not work.

Gavin

0 Sandeep Tammana over 4 years ago in reply to Gavin Wang (Zejing)

Hello Gavin,

Thank you for your quick feedback.

Could you please share the links of any reference documents or test reports related to mentioned Rfbt and RT/SYNC pins error scenarios?

Best Regards,

Sandeep.

0 Gavin Wang (Zejing) over 4 years ago in reply to Sandeep Tammana

Hi Sandeep,

You can test the error condition using our EVM or your PCB board, it is easy to observe the conclusion.

Gavin

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