LM3880: LM3380

Raza Shah

Part Number: LM3880

I have 5 different voltages in y circuit and i need a power on and power down sequence for it since i came to know about LM3880 but i am unable to find current restrictions for example the voltage which i have need to be restricted in term of current or there is no restrictions on current limit.

Thanks

over 8 years ago

0 Vincenzo Pizzolante over 8 years ago

TI__Mastermind 25486 points

hi Raza

I don't get the question... you mean the ratings of the flagx pins?

if this is the question you can refer the abs.max. table

kr
Vincenzo

0 Raza Shah over 8 years ago in reply to Vincenzo Pizzolante

Prodigy 165 points

yes my concern was flag pin rating. but i have also some more confusion about this component.

from the design point of view ,Is it possible to left second flag unconnected in order to introduce double time delay between first and third flag.

Regarding the enable pin is it right if i connect it to 5V for high and 0V for low.

Thanks

0 Vincenzo Pizzolante over 8 years ago in reply to Raza Shah

TI__Mastermind 25486 points

hi Raza,

yes, of course you can...

the outputs are opendrain, so as long as the current is below 50mA (on state) and the voltage is below VCC+0.3V (off state), then there is no problem at all...

if you need to pull-up to a higher voltage than you can consider using either a zener or a voltage divider...

hope this helped a bit

Vincenzo

Power management

Power management forum

LM3880: LM3380