MIC2564A_04 Datasheet, PDF (1/14 Pages) Micrel Semiconductor – Dual Serial PCMCIA/CardBus Power Controller

MIC2564A
Micrel
MIC2564A
Dual Serial PCMCIA/CardBus Power Controller
General Description
The MIC2564A is dual-slot PC Card PCMCIA (Personal Com-
puter Memory Card International Association) and CardBus
power controller. It is a sophisticated power switching matrix
that controls V_CC and V_PP voltages to two PC Card slots. The
MIC2564A is used in conjunction with a serial-data output logic
controller using the standard three-wire serial control data
format.
When connected to 3.3V, 5V, and 12V system power supplies,
the MIC2564A can switch its V_CC outputs between 0V, 3.3V,
5.0V, and high-impedance states and V_PP outputs between 0V,
3.3V, 5V, 12V, and high-impedance states. The V_CC outputs
will supply a minimum of 1A current to the socket and the V_PP
outputs will supply a minimum of 120mA to the socket. Voltage
rise and fall times are well controlled. The MIC2564A also
features an efficient standby (sleep) mode at 0.3mA typical
quiescent current.
12V and 5V supplies are not required for MIC2564A operation
making it possible to omit one or both supplies when they are not
needed by the system. An internal charge pump supplies the
internal bias voltages required for high-performance switching.
The MIC2564A is protected by overtemperature shutdown, and
protects itself and the system with current limiting and cross-
conduction lockout.
The MIC2564A is available in 24-pin SSOP, 24-pin TSSOP,
and an environmentally friendly (lead-free) 24-pin TSSOP.
All support documentation can be found on Micrel’s web site
at www.micrel.com.
Features
• Standard 3-wire serial control data input
• Controls two card slots from one surface mount device
• High-efficiency, low-resistance switches
• 12V supply optional (not required by MIC2564A)
• Current limit and overtemperature shutdown
• Ultra-low 1mA-typical standby power consumption
• Cross-conduction lockout (no switching transients)
• Break-before-make switching
• 1A minimum V_CC output per slot
• Independent V_CC and V_PP voltage output (MIC2564A-1)
• 120mA minimum V_PP output current per slot
• Lead-free 24-pin surface-mount TSSOP package
• UL recognized, file #179633
Applications
• PC Card and CardBus power control
• Zoom Video port power control
• Wireless communications
• Bar code data collection systems
• Docking stations (portable and desktop)
• Power supply management
Typical Application
Address and data lines
between logic controller and
PCMCIA cards not shown.
System Reset
Dual-Slot
Logic Controller
PCMCIA,
CardBus,
or Zoom Video
System Power Supply
(OPTIONAL)
12V
3.3V
(OPTIONAL)
5V
V_PP IN V_CC3 IN
(OPTIONAL)
V_CC5 IN
(OPTIONAL)
RST#
MIC2564A
Serial
Control
Power
Controller
Bus
GND
A V_PP OUT
A V_CC OUT
B V_PP OUT
B V_CC OUT
Slot A
V_PP1
V_PP2
V_CC
Slot B
V_PP1
V_PP2
V_CC
PCMCIA
Card
A
PCMCIA
Card
B
Motherboard
UL Recognized Component
PCMCIA Card Power Management Application
Micrel, Inc. • 1849 Fortune Drive • San Jose, CA 95131 • USA • tel + 1 [phone] • fax + 1 [phone] • http://www.micrel.com
March 2004
1
M0250-031104