MIC2563A
Micrel
MIC2563A
Dual-Slot PCMCIA/CardBus Power Controller
General Description
Features
The MIC2563A dual-slot PCMCIA (Personal Computer
Memory Card International Association) and CardBus power
controller handles all PC Card slot power supply pins, both
VCC and VPP. The MIC2563A switches between the three
VCC voltages (0V, 3.3V and 5.0V) and the VPP voltages (OFF,
0V, 3.3V, 5V or 12.0V) required by PC Cards. The MIC2563A
switches voltages from the system power supply to VCC and
VPP. Output voltage is selected by two digital inputs each and
output current ranges up to 1A for VCC and 250mA for VPP.
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The MIC2563A provides power management capability controlled by the PC Card logic controller. Voltage rise and fall
times are well controlled. Medium current VPP and high
current VCC output switches are self-biasing: no +12V supply is required for 3.3V or 5V output.
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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 crossconduction lockout protects the system power supplies during switching operations.
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 VCC and VPP
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 VCC and VPP voltages
Over 1A VCC output current for each section
Over 250mA VPP output current for each section
Lead-free 28-pin SSOP package
UL recognized, file #179633
Applications
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The MIC2563A is an improved version of the MIC2563,
offering lower on-resistances and a VCC pull-down clamp in
the OFF mode. It is available in a standard 28-pin SSOP, as
well as an environmentally friendly (lead-free) 28-pin SSOP.
All support documentation can be found on Micrel’s web
site at www.micrel.com.
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
Typical Application
5V
(opt)
System
Power 3.3V
Supply
12V
(opt)
VPP IN VCC3 IN VCC5 IN
(opt)
(opt)
A EN0
A EN1
A V CC5_EN
PCMCIA
Card Slot
Controller
VPP1
VPP2 PCMCIA
Card Slot
A
VCC
A V CC3_EN
MIC2563
VPP1
B EN0
B EN1
B V CC5_EN
VPP2 PCMCIA
PCMCIA
Card Slot
Card Slot
B
VCC
B V CC3_EN
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
March 2004
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M9999-033004