MIC2564A Datasheet, PDF (1/16 Pages) Micrel Semiconductor – Dual Serial PCMCIA/CardBus Power Controller Preliminary Information

MIC2564A
Micrel
MIC2564A
Dual Serial PCMCIA/CardBus Power Controller
Preliminary Information
General Description
The MIC2564A is dual-slot PC Card (PCMCIA) 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 sup-
plies, 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
0.3µA typical quiescent current.
12V and 5V supplies are not required for MIC2564A opera-
tion 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-perfor-
mance 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 and 24-pin
TSSOP.
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
• Ultralow 1µA-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
• 24-pin surface-mount SSOP and TSSOP packages
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
Ordering Information
Part Number
MIC2564A-0BSM
MIC2564A-1BSM
MIC2564A-0BTS
MIC2564A-1BTS
Temperature Range
–40°C to +85°C
–40°C to +85°C
–40°C to +85°C
–40°C to +85°C
Package
24-pin SSOP
24-pin SSOP
24-pin TSSOP
24-pin TSSOP
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
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
September 1999
1
MIC2564A