the sw reg is fed from the battery before the series diode to the pic
and yes it has a shutdown but interestingly since it is a boost reg the full battery dc voltage appears at the output (thru the inductor) during shutdown so the shutdown pin is worthless to me
so i had to put a load sw (P+N mosfet) in front of the sw reg to fully shut it down
this also has the benefit of reverse protection to the sw reg due to the body diode in the P fet

it is really a challenge to get this thing down to a few uA's of standby!

but i still welcome any comments from people who run their pics for years near 6.5V abs max