LP8869C-Q1: FAULT PIN Pullup Issue

SADHISH K

Part Number: LP8869C-Q1

For LP8869C-Q1, FAULT Pin is connected to 5v pullup instead of connecting to VDDIO. While measuring the voltage at Fault pin it is showing only 4.6V instead of 5V. We have used 10k Resister value for pullup, What is the Reason for this voltage drop?

over 3 years ago

0 Charles-Chen over 3 years ago

TI__Genius 11836 points

Hi Sir,

I suggest to measure the 5V rail and find the other possible leakage path of fault pin. Also check the mcu fault read back IO. Share your related schematic to clarify your circuit.

0 Charles-Chen over 3 years ago in reply to Charles-Chen

TI__Genius 11836 points

Hi Sir,

Do you have any feedback?

0 Charles-Chen over 3 years ago in reply to Charles-Chen

TI__Genius 11836 points

Hi Sir,

I will close this thread temporarily since you don't have feedback for me. You can keep ask questions if you have any update.

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LP8869C-Q1: FAULT PIN Pullup Issue