LP2985: What would be the effect of BYP pin shorted to ground?

Lukasz Smola

Part Number: LP2985

I'm wondering what would be the effect of BYP pin of LP2985 shorted to ground (e.g. failure mode of connected capacitor)?

over 2 years ago

+1 Nick Butts over 2 years ago

TI__Mastermind 38115 points

Hi Lukasz,

I checked this on the bench and when the BYP pin is connected to GND the reference voltage cannot get all the way to its target and the output sits at some intermediate value. In my test case I used a 3.3V fixed-output device with VIN = 5V and I measured VOUT = 1.49V. The device is not destroyed in this failure mode - upon removing the short the device works normally.

Regards,

Nick

0 Lukasz Smola over 2 years ago in reply to Nick Butts

Prodigy 10 points

Thank you very much, I this is exactly what I needed, to know if this failure will be "safe".

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LP2985: What would be the effect of BYP pin shorted to ground?