TPL5110: Does the DONE signal require a Pull-Down?

Brian Krejcarek

Part Number: TPL5110

Simple question. Do we need a Pull-down resistor on the DONE signal? If the uP is FET-gated OFF, won't the DONE signal GPIO from the uP be left floating and prone to noise? Or is there an internal Pull-down in the TPL5110?

Also -- any small packaging offered other the the SOT-23 Thin?

Thanks,
Brian

over 6 years ago

0 Puneet Sareen over 6 years ago

TI__Expert 8865 points

Hello Brian

If the DONE pin is not used, it should be grounded(pull down) so there is no chance that noise or interference will cause the device to register a pulse.
TPL5110 is only offered in SOT-23 Thin.

Best regards
Puneet

0 Brian Krejcarek over 6 years ago in reply to Puneet Sareen

Intellectual 505 points

Thanks Puneet,

Under what use case would the DONE signal be unused? Isn't that critical for the functionality of the chip?

Thanks,

Brian

0 Puneet Sareen over 6 years ago in reply to Brian Krejcarek

TI__Expert 8865 points

Hi Brian
We have seen some customers using the one shot mode with DONE not used.
Best regards
Puneet

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TPL5110: Does the DONE signal require a Pull-Down?