MIC2563A
Micrel
MIC2563A
Dual Slot PCMCIA/CardBus Power Controller
Preliminary Information
General Description
The MIC2563A Dual Slot PCMCIA (Personal Computer
Memory Card International Association) and CardBus Power
Controller handles all PC Card slot power supply pins, both
V
CC
and V
PP
. The MIC2563A switches between the three V
CC
voltages (0V, 3.3V and 5.0V) and the V
PP
voltages (OFF, 0V,
3.3V, 5V, or 12.0V) required by PC Cards. The MIC2563A
switches voltages from the system power supply to V
CC
and
V
PP
. Output voltage is selected by two digital inputs each and
output current ranges up to 1A for V
CC
and 250mA for V
PP
.
The MIC2563A provides power management capability con-
trolled by the PC Card logic controller. Voltage rise and fall
times are well controlled. Medium current V
PP
and high
current V
CC
output switches are self-biasing:
no +12V supply
is required for 3.3V or 5V output.
The MIC2563A is designed for efficient operation. In standby
(sleep) mode the device draws very little quiescent current,
typically 0.3µA. The device and PCMCIA port is protected by
current limiting and overtemperature shutdown. Full cross-
conduction lockout protects the system power supplies.
The MIC2563A is an improved version of the MIC2563,
offering lower ON-resistances and a V
CC
pulldown clamp in
the OFF mode. It is available in a 28-pin SSOP.
Applications
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Dual Slot PC Card Power Supply Pin 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
Docking Stations (portable and desktop)
Power Supply Management
Power Analog Switching
2
Features
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Single Package Controls Two PC Card Slots
High Efficiency, Low Resistance Switches Require No
12V Bias Supply
No External Components Required
Output Current Limit and Overtemperature Shutdown
Ultra Low Power Consumption
Complete Dual Slot PC Card/CardBus V
CC
and V
PP
Switch Matrix in a Single Package
Logic Compatible with Industry Standard PC Card Logic
Controllers
No Voltage Shoot-Through or Switching Transients
Break-Before-Make Switching
Digital Selection of V
CC
and V
PP
Voltages
Over 1A V
CC
Output Current for Each Section
Over 250mA V
PP
Output Current for Each Section
28-Pin SSOP Package
Ordering Information
Part Number
MIC2563A-0BSM
MIC2563A-1BSM
Temperature Range
–40°C to +85°C
–40°C to +85°C
Package
28-pin SSOP
28-pin SSOP
Typical Application
5V
(opt)
System
Power 3.3V
Supply
12V
(opt)
VPPIN VCC3IN VCC5IN
(opt)
VPP1
VPP2 PCMCIA
Card Slot
A
VCC
EN0
Note: see the logic table inside for a description of the differences
between the logic options
PCMCIA
Card Slot
Controller
EN1
VCC5_EN
VCC3_EN
MIC2563
VPP1
EN0
EN1
VCC5_EN
VCC3_EN
PCMCIA
VPP2 PCMCIA
Card Slot
Card Slot
B
VCC
1997
2-47
MICREL [ MICREL SEMICONDUCTOR ]
