MIC2566
Micrel
System
Power
Supply
5V
VCC3IN
VCC5IN
VPP1
VPP2
PCMCIA
Card Slot
EN0
EN1
MIC2566
VCC
PCMCIA
Card Slot
Controller
VCC5_EN
VCC3_EN
Figure 3. PC Card Slot Power Control Application Without an Available 3.3V V
CC
Note that V
CC3 IN
and V
CC5 IN
are driven together. The MIC2566 is powered by the V
CC3 IN
line. In this configuration, V
CC OUT
will be 5V
when either V
CC3
or V
CC5
is enabled from the logic table. Take advantage of the lower switch resistance of the V
CC5
switch by using the
V
CC5_EN
control as your main V
CC
switch.
May 2003
9
MIC2566