Does anyone know how the polarity of operation for the inhibit pin that is available on the SO-8 package only? The data sheet does not describe the function of the inhibit input, other than calling it an inhibit. Which polarity inhibits the regulator? Thanks.
LM2931 LDO Regulator SO-8
Apr 04, 2005
4 Replies
This datsheet doesn't show anything clearly.
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RTFM. Page 4 shows a pretty picture with a switch for on/off control. 0V = ON, Vcc via 51k = OFF
HTH
Terry
On Sun, 3 Apr 2005 23:32:09 -0400, "Jerry Girard" wroth:
Have you looked at the datasheet 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
RTFM. Page 4 shows a pretty picture with a switch for on/off control. 0V = ON, Vcc via 51k = OFF
HTH
Terry
I sit corrected. What a thoroughly unhelpful datasheet. FABM would have been more appropriate (Find A Better Manual).
ST have some of the worst datasheets.
Cheers Terry
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