Re: LM2931 LDO Regulator SO-8

From: James Meyer <jmeyer@xxxxxxxxxxx>
Date: Mon, 04 Apr 2005 04:07:46 GMT

On Sun, 3 Apr 2005 23:32:09 -0400, "Jerry Girard" <jgirard1@xxxxxxxxx> wroth:

>Does anyone know how the polarity of operation for the inhibit pin that is
>available on the SO-8 package only? The data *** does not describe the
>function of the inhibit input, other than calling it an inhibit. Which
>polarity inhibits the regulator? Thanks.
>

Have you looked at the data*** available at National? It clearly
shows:

On/Off Threshold Voltage VO=3V
On 2.0 1.2 VMAX
Off 2.2 3.25 VMIN
On/Off Threshold Current 20 50 µAMAX

The figure on page four shows the ON/OFF pin pulled up to Vcc/IN with a
51K resistor for "off" and the pin is directly tied to ground/GND for "on".

Jim "From the horse's mouth" Meyer

.

References:
- LM2931 LDO Regulator SO-8
  - From: Jerry Girard

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