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
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 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 supply
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 0.3碌A. The device and PCMCIA port is protected by
current limiting and overtemperature shutdown. Full cross-
conduction lockout protects the system power supply.
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.
Applications
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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
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
and V Switch Matrix
CC
PP
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
and V Voltages
CC
PP
Over 1A V
Output Current
CC
Over 200mA V Output Current
PP
Small 14-Pin SOIC Package
Features
Ordering Information
Part Number
MIC2562A-0BM
MIC2562A-1BM
Temperature Range
鈥?0掳C to +85掳C
鈥?0掳C to +85掳C
Package
14-pin Narrow SOIC
14-pin Narrow SOIC
Pin Configuration
GND
13
2
V
CC5
IN
12
3
V
CC
OUT
*
11
4
V
CC5
IN
*
10
5
V
CC
OUT
FLAG
6
9
V
CC3
IN
V
PP
IN
7
8
V
CC
OUT
V
PP
OUT
* see table below
14
Note: see the logic table inside for a description of the differences
between the logic options
Typical Application
5V
System
Power 3.3V
Supply
12V
(opt)
VPPIN VCC3IN VCC5IN
(opt)
V
CC5_EN
V
CC3_EN
VPP1
VPP2
PCMCIA
Card Slot
EN0
14 Pin S.O. Package
Both V
CC5
IN pins must be connected.
All three V
CC
OUT pins must be connected.
EN1
MIC2562
VCC
VCC5_EN
VCC3_EN
PCMCIA
Card Slot
Controller
MIC2562A Pin Assignments
Pin
3
4
-0
EN0
EN1
-1
V
PP_VCC
V
PP_PGM
MIC2562A
54
July 1999
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