MIC2568 Datasheet, PDF (9/10 Pages) Micrel Semiconductor – Dual-Slot PC Card/CardBus Power Controller

MIC2568
5V-Only V_CC Application
To use the MIC2568 in applications where only a single 5V
V_CC is available (no 3.3V V_CC), connect V_CC5 (5V supply) to
the V_CC3 IN pin. Refer to Figure 4. In this configuration, V_CC
OUT ^{will be 5V when either V}CC3 ^{switch or V}CC5 ^{switch is}
enabled.
Address and data lines
between logic controller and
PCMCIA cards not shown.
Dual-Slot
PC Card
Logic Controller
System Power Supply
5V
A_{⁄BVCC3 IN} A_{⁄BVCC5 IN}
A EN1
A EN0
A V_CC5 EN
A V_CC3 EN
B EN1
B EN0
B V_CC5 EN
B V_CC3 EN
A V_PP OUT
A V_CC OUT
MIC2568-0
Power
Controller
GND
B V_PP OUT
B V_CC OUT
Slot A
V_PP1
V_PP2
V_CC
V_CC
Slot B
V_PP1
V_PP2
V_CC
V_CC
Motherboard
Figure 4. 5V-Only V_CC Application
PC Card
A
PC Card
B
Micrel
May 2003
9
MIC2568