> I have a PIC controlled circuit that also includes an LM386 audio
> amplifier. When I put the PIC into sleep mode, I'd like to eliminate the
> power drain of the amp. I can use a relay to do this but I figure that
> there is probably some very clean solid state way to accomplish this.

Hi John,
Let me rush in here before several other people tell you to replace that
useful inexpensive LM386 chip with some expensive unavailable chip just
because it includes a powerdown pin.

Use a PNP transistor as a switch for the power on the LM386. A base
resistor of 470 ohms will probably work. If the LM386 is running on
something higher than the voltage the PIC is running at, think about using
RA4 as the pin to drive the transistor, before trying something more
complicated, as it is open-drain and will tolerate up to 12 volts.

A PN2907 is not a bad choice for the transistor.

Now everyone else may jump in and tell you to buy a $3 amp chip, or one
that is only available in quantities of 5000 with a 16 week lead time.

Cheers,
Bob