MIC2561 Micrel
January 2005 1 MIC2561
MIC2561
PCMCIA Card Socket V
CC
and V
PP
Switching Matrix
Final Information
Applications
• 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
• Complete PCMCIA V
CC
and V
PP
Switch Matrix in a
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
• Digital Selection of V
CC
and V
PP
Voltages
• Over 750mA of V
CC
Output Current
• 200mA of V
PP
Output Current
• 14-Pin SOIC Package
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.
System
Power
Supply
PCMCIA
Card Slot
Controller
MIC2561
PCMCIA
Card Slot
5V
3.3V
12V
EN0
EN1
V
PP1
V
CC
V
PP
IN V
CC5
IN
V
CC3
IN
V
CC5_EN
V
CC3_EN
V
PP2
Micrel, Inc. • 1849 Fortune Drive • San Jose, CA 95131 • USA • tel + 1 (408) 944-0800 • fax + 1 (408) 944-0970 • http://www.micrel.com
Ordering Information
Part Number
Standard Pb-free Temp. Range Package
MIC2561-0BM MIC2561-0YM 0°C to +70°C 14-pin SOIC
MIC2561-1BM MIC2561-1YM 0°C to +70°C 14-pin SOIC