About driving EN pin

Tomohiro Nagasawa

Expert 1710 points

Hello I have two question about TPS43340.

Please advice about it.

(Question)

・Is EN pin input bipolar or CMOS? and How much is enough current to drive EN pin?

・Is below connection between RST to EN is OK?

Thanks

Best Regards

Tomohiro Nagasawa

over 11 years ago

0 Mahmoud Harmouch over 11 years ago

TI__Mastermind 28340 points

I will check and post the answer once available

0 Tomohiro Nagasawa over 11 years ago in reply to Mahmoud Harmouch

Expert 1710 points

Do you have any update?

Regards

Tomohiro Nagasawa

0 Mahmoud Harmouch over 11 years ago in reply to Tomohiro Nagasawa

TI__Mastermind 28340 points

The EN pull up current is 0.5uA and is enough to drive the EN pin high and enable its respective regulator. The EN is voltage driven so it is CMOS input. To disable the regulator the EN pin voltage should be lower than 0.7V. That means the RST signal low level should be less than 0.7V

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About driving EN pin