Pull-down resister of TPS23753's APD pin

user5957374

Other Parts Discussed in Thread: TPS23753

In the TPS23753's datasheet, APD pin is described as "Pull APD above 1.5V to disable the internal PD hotswap switch". But, on my PCB board, if the pull-down resister is not 47kohm, the IC won't work. I want to know why.

over 6 years ago

0 Thomas Lewis over 6 years ago

TI__Expert 5615 points

User5957374, You have submitted a question over the weekend so please give us until Monday morning, US time, to respond.

And, just to be clear, are you asking about the TPS23753 (not recommended for new designs) or TPS23753A?

Thank you for the post,

0 user5957374 over 6 years ago in reply to Thomas Lewis

Prodigy 20 points

Thomas

It's TPS23753, the IC's Marking is TP23753.

Thanks

0 Darwin Fernandez over 6 years ago in reply to user5957374

TI__Mastermind 41780 points

Hi User,

Do you have APD pulled down with a resistor because you want to disable the functionality of APD?

Per the datasheet, APD can be disabled with by connecting it to RTN. Have you tried with a 0 ohm resistor instead?

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Pull-down resister of TPS23753's APD pin