MIC2563A_04 Datasheet, PDF (1/12 Pages) Micrel Semiconductor – Dual-Slot PCMCIA/CardBus Power Controller

MIC2563A
Micrel
MIC2563A
Dual-Slot PCMCIA/CardBus Power Controller
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 sup-
ply 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 dur-
ing switching operations.
The MIC2563A is an improved version of the MIC2563,
offering lower on-resistances and a V_CC 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.
Features
• 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
• Lead-free 28-pin SSOP package
• UL recognized, file #179633
Applications
• 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)
PCMCIA
Card Slot
Controller
VPP IN VCC3 IN VCC5 IN
(opt)
(opt)
A EN0
A EN1
A VCC5_EN
A VCC3_EN
MIC2563
B EN0
B EN1
B VCC5_EN
B VCC3_EN
VPP1
VPP2
PCMCIA
Card Slot
A
VCC
VPP1
VPP2 ^PPCCMMCCIIAA
CCaarrdd SSlloott
VCC
B
UL Recognized Component
Micrel, Inc. • 1849 Fortune Drive • San Jose, CA 95131 • USA • tel + 1 [phone] • fax + 1 [phone] • http://www.micrel.com
March 2004
1
M9999-033004