MIC2562A_04 Datasheet, PDF (1/12 Pages) Micrel Semiconductor – PCMCIA/CardBus Socket Power Controller

MIC2562A
Micrel
MIC2562A
PCMCIA/CardBus Socket Power Controller
General Description
The MIC2562A 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 MIC2562A switches between the three V_CC volt-
ages (0V, 3.3V and 5.0V) and the V_PP voltages (OFF, 0V,
3.3V, 5V or 12.0V) required by PC Cards. The MIC2562A
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 MIC2562A 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 MIC2562A 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 supply during
switching operations.
The MIC2562A is an improved version of the MIC2562,
offering lower on-resistance and a V_CC pull-down clamp in
the OFF mode. It is available in a 14-pin (0.150") SOIC, and
the -1 logic option is also available in 16-pin TSSOP
All support documentation can be found on Micrel’s web
site at www.micrel.com.
Features
• High-efficiency, low-resistance switches require no
12V bias supply
• No external components required
• Output current limit and overtemperature shutdown
• Open-drain flag for error condition indication
• Ultra-low power consumption
• Complete 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
• Over 200mA V_PP output current
• Pb-free SOIC packages
• UL recognized, file #179633
Applications
• 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
• Analog power switching
Typical Application
5V
System
Power 3.3V
Supply
12V
(opt)
PCMCIA
Card Slot
Controller
VPP IN VCC3 IN VCC5 IN
(opt)
EN0
EN1
MIC2562
VCC5_EN
VCC3_EN
VPP1
VPP2 PCMCIA
Card Slot
VCC
UL Recognized Component
Micrel, Inc. • 1849 Fortune Drive • San Jose, CA 95131 • USA • tel + 1 [phone] • fax + 1 [phone] • http://www.micrel.com
June 2004
1
M9999-062204