MIC2562A
5V
System
Power 3.3V
Supply
12V
VPPIN VCC3IN VCC5IN
(opt)
Micrel
5V
System
Power 3.3V
Supply
PCMCIA
Card Slot
VPP1
VPP2
12V
(opt)
VPPIN VCC3IN VCC5IN
(opt)
VPP1
VPP2
PCMCIA
Card Slot
EN0
EN1
MIC2562
VCC
VCC5_EN
VCC3_EN
EN0
EN1
MIC2562
VCC
VCC5_EN
VCC3_EN
PCMCIA
Card Slot
Controller
PCMCIA
Card Slot
Controller
VPP IN VDD
VCC
EN0
EN1
VPP OUT
MIC2557
Figure 3. MIC2562A PC Card slot power control applica-
tion with dual V
CC
(5V and 3.3V) and separate V
PP1
and
V
PP2
.
Figure 4. Typical MIC2562A PC Card slot power control
application with dual V
CC
(5V and 3.3V). Note that V
PP1
and
V
PP2
are driven together.
5V
System
Power
Supply
12V
(opt)
VPPIN VCC3IN VCC5IN
(opt)
VPP1
VPP2
PCMCIA
Card Slot
EN0
EN1
MIC2562
VCC
VCC5_EN
VCC3_EN
PCMCIA
Card Slot
Controller
Figure 5. 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 MIC2562A 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.
MIC2562A
62
July 1999
MICREL [ MICREL SEMICONDUCTOR ]
