LP2951 Shutdown

Gerry Kurz

Other Parts Discussed in Thread: LP2951, LP2951-N

Can the LP2951 shutdown input be left open (floating) or does it need to be driven? There is no mention of this in the data sheet and the block diagram of the part is unclear regarding this.

over 14 years ago

0 Donald Jones over 14 years ago

TI__Mastermind 22610 points

LP2951 shutdown pin has internal pull-down to GND. OK to leave open.

From the Schematic Diagram on Page 22 of the data sheet ...

0 Gerry Kurz over 14 years ago in reply to Donald Jones

Intellectual 685 points

Where did you find that data sheet? The one I downloaded today does not that that diagram. I one I got is SLVS582G –APRIL 2006–REVISED JULY 2011

0 Donald Jones over 14 years ago in reply to Gerry Kurz

TI__Mastermind 22610 points

This is from the National Semiconductor version, now identified as 'LP2951-n'

Document # is : SNVS764M

http://www.ti.com/lit/ds/symlink/lp2951-n.pdf

0 Ron Michallick over 14 years ago in reply to Donald Jones

TI__Guru**** 171066 points

Gerry,

In the TI data sheet the level of input current suggests the resistor(s) to ground.

It is also OK to ground the pin

Regards,
Ron Michallick

Power management

Power management forum

LP2951 Shutdown