At 01:45 PM 3/2/2004 -0800, you wrote:
>I am pulling pin 1 low.  If this pin is below the threshold, then the gate
>voltage shuts off.  And that works.  However, when I release it, the voltage
>on pin 1 goes above threshold, yet the gate voltage sits around 4V rather
>than around 60V

Sounds like something wrong with the MOSFET or the LTC1641. Could you have
blown the gate on the MOSFET by leaving out the D1 zener or R5
during testing?

Best regards,

Spehro Pefhany --"it's the network..."            "The Journey is the reward"
speff@interlog.com             Info for manufacturers: http://www.trexon.com
Embedded software/hardware/analog  Info for designers:  http://www.speff.com

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