MIC2561
Micrel
MIC2561
PCMCIA Card Socket V
CC
& V
PP
Switching Matrix
General Description
The MIC2561 V
CC
& V
PP
Matrix controls PCMCIA (Personal
Computer Memory Card International Association) memory
card power supply pins, both V
CC
and V
PP
. The MIC2561
switches voltages from the system power supply to V
CC
and
V
PP
. The MIC2561 switches between the three V
CC
voltages
(OFF, 3.3V and 5.0V) and the V
PP
voltages (OFF, 0V, 3.3V,
5V, or 12.0V) required by PCMCIA cards. Output voltage is
selected by two digital inputs for each output and output
current ranges up to 750mA for V
CC
and 200mA for V
PP
. For
higher V
CC
output current, please refer to the full-perfor-
mance MIC2560.
The MIC2561 provides power management capability under
the control of the PC Card controller and features overcurrent
and thermal protection of the power outputs, zero current
“sleep” mode, suspend mode, low power dynamic mode, and
ON/OFF control of the PCMCIA socket power.
The MIC2561 is designed for efficient operation. In standby
(“sleep”) mode the device draws very little quiescent current,
typically 0.01µA. The device and PCMCIA port is protected by
current limiting and overtemperature shutdown. Full cross-
conduction lockout protects the system power supply.
Applications
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PCMCIA Power Supply Pin Voltage Switch
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
Features
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Complete PCMCIA V
and V
Switch Matrix in a
CC
PP
Single IC
No External Components Required
Controlled Switching Times
Logic Options for Compatible with Industry Standard
PCMCIA Controllers
No Voltage Overshoot or Switching Transients
Break-Before-Make Switching
Output Current Limit and Over-Temperature Shutdown
Digital Flag for Error Condition Indication
Ultra Low Power Consumption
and V Voltages
Digital Selection of V
CC
PP
Over 750mA of V
Output Current
CC
200mA of V Output Current
PP
14-Pin SOIC Package
Ordering Information
Part Number
MIC2561-0BM
MIC2561-1BM
Temperature Range
0°C to +70°C
0°C to +70°C
Package
14-pin SOIC
14-pin SOIC
Typical Application
5V
System
Power 3.3V
Supply
12V
VPPIN VCC3IN VCC5IN
VPP1
VPP2
PCMCIA
Card Slot
EN0
EN1
MIC2561
VCC
VCC5_EN
VCC3_EN
PCMCIA
Card Slot
Controller
2-30
1997
MICREL [ MICREL SEMICONDUCTOR ]
