BQ76930: Can the CAP1 output from the AFE be used to drive other circuitry?

Mike Mrazik

Part Number: BQ76930

Can't find much information in any of the technical documents on CAP1. For example, how much current can that pin source, and is it a fixed 3.3V? I'd like to at the very least drive a couple of I2C pullups, but if it can handle more I'd like to utilize it instead of a secondary LDO. Same question for CAP2, what capabilities does that have?

Thanks, Mike

over 7 years ago

0 Matt Sunna over 7 years ago

TI__Guru* 81034 points

Hi Mike,

CAP1 is a fixed 3.3V. This capacitor is needed by the internal regulator to maintain the internal voltages for multiple circuits in the device. It is not designed to power anything externally and you do not want to put any noise on these pins.

Best regards,
Matt

0 Mike Mrazik over 7 years ago in reply to Matt Sunna

Expert 1255 points

Understood, thank you Matt!

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BQ76930: Can the CAP1 output from the AFE be used to drive other circuitry?