MIC2568
Micrel
MIC2568
Dual-Slot PC Card/CardBus Power Controller
Preliminary
General Description
The MIC2568 dual-slot PC Card / CardBus power controller
is a V
CC
and V
PP
power switch matrix that supports 3.3V and
5V PC Card (PCMCIA) slot power supply pins.
The MIC2568 can switch PC Card slot V
CC
voltages between
0V (ground), 3.3V and 5.0V and V
PP
voltages between 0V
(ground), 3.3V, 5V, or high impedance at output currents of
up to 1A for V
CC
and 250mA for V
PP
. The MIC2568 features
well-controlled voltage rise and fall times. Each MIC2568
output voltage is switched by two digital inputs, typically
controlled from a separate PC Card logic controller.
The MIC2568 is designed for efficient operation. In standby
(sleep) mode the device draws very little quiescent current,
typically only 0.3µA. The power controller includes thermal
shutdown and protects itself and its PC Card ports with
current limiting. Full cross-conduction lockout protects the
system power supplies.
The MIC2568 is available in 28-pin SSOP and TSSOP
packages.
Features
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
Complete single-chip dual-slot power switch
No external components required
Output current limit and thermal shutdown
Ultra-low power consumption
Compatible with standard PC Card logic controllers
Break-before-make switching (no transients)
Digital V
CC
and V
PP
voltage selection
> 1A V
CC
output current per slot
> 200mA V
PP
output current per slot
28-pin SSO and TSSO package
Pb-free 28-pin SSO package
UL recognized, file #179633
Dual-slot PC Card power supply voltage switch
CardBus slot power supply control
Data collection systems
Machine control data input systems
Wireless communications
Bar code data collection systems
Instrumentation configuration/datalogging
Portable and desktop computer docking stations
Power supply management
Power analog switching
Applications
Typical Application
Independent supply
inputs can be used with
two system power supplies.
(Single system supply shown.)
Address and data lines
between logic controller and
PCMCIA cards not shown.
A V
CC3
IN
A V
CC5
IN
(
OPTIONAL
)
A EN1
A EN0
A V
CC5
EN
Dual-Slot
PC Card
Logic Controller
A V
CC3
EN
B EN1
B EN0
B V
CC5
EN
B V
CC3
EN
(
OPTIONAL
)
B V
CC3
IN
B V
CC5
IN
A V
PP
OUT
A V
CC
OUT
MIC2568
Power
Controller
System Power Supply
3.3V
(
OPTIONAL
)
5V
Slot A
V
PP
1
V
PP
2
V
CC
V
CC
PC Card
A
GND
Slot B
B V
PP
OUT
B V
CC
OUT
V
PP
1
V
PP
2
V
CC
V
CC
PC Card
B
Motherboard
Dual-Slot PC Card Power Control
UL Recognized Component
Micrel, Inc. • 1849 Fortune Drive • San Jose, CA 95131 • USA • tel + 1 (408) 944-0800 • fax + 1 (408) 944-0970 • http://www.micrel.com
May 2003
1
MIC2568
MIC [ MIC GROUP RECTIFIERS ]
