Original message from: Spehro Pefhany > >At 08:49 AM 2/1/02 +1300, you wrote: >> >>The LM2941 has a regrettably high quiescent current in shut down mode. > >>More expensive, but there is the LP3964 which uses an internal MOSFET >pass transistor. 15uA in shutdown., but doesn't have the automotive >resistant specs of the LM2941. Too high a shutdown current to eliminate >the on/off switch in many applications, but a heck of a lot better than >the few-mA Iq of a 78xx. Hey guys - I just tried that configuration with the PNP transistor in the i/p of the 3T regulator. Works like a charm! (transistor base low, o/p = 8V, base high, o/p= 0V) Uh .. didn't measure total Iq. Better do that ... :) Regards - Ian __________________________________________________________________ Get your free Australian email account at http://www.start.com.au -- http://www.piclist.com hint: To leave the PICList mailto:piclist-unsubscribe-request@mitvma.mit.edu