MIC2568
Micrel
MIC2568
Dual-Slot PC Card/CardBus Power Controller
Preliminary
General Description
The MIC2568 dual-slot PC Card / CardBus power controller
is a V
CC
and V
PP
power switch matrix that supports 3.3V and
5V PC Card (PCMCIA) slot power supply pins.
The MIC2568 can switch PC Card slot V
CC
voltages between
0V (ground), 3.3V and 5.0V and V
PP
voltages between 0V
(ground), 3.3V, 5V, or high impedance at output currents of
up to 1A for V
CC
and 250mA for V
PP
. The MIC2568 features
well-controlled voltage rise and fall times. Each MIC2568
output voltage is switched by two digital inputs, typically
controlled from a separate PC Card logic controller.
The MIC2568 is designed for efficient operation. In standby
(sleep) mode the device draws very little quiescent current,
typically only 0.3µA. The power controller includes thermal
shutdown and protects itself and its PC Card ports with
current limiting. Full cross-conduction lockout protects the
system power supplies.
The MIC2568 is available in 28-pin SSOP and TSSOP
packages.
Features
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Complete single-chip dual-slot power switch
No external components required
Output current limit and thermal shutdown
Ultra-low power consumption
Compatible with standard PC Card logic controllers
Break-before-make switching (no transients)
Digital V
CC
and V
PP
voltage selection
> 1A V
CC
output current per slot
> 200mA V
PP
output current per slot
28-pin SSO and TSSO package
Pb-free 28-pin SSO package
UL recognized, file #179633
Dual-slot PC Card power supply 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
Portable and desktop computer docking stations
Power supply management
Power analog switching
Applications
Typical Application
Independent supply
inputs can be used with
two system power supplies.
(Single system supply shown.)
Address and data lines
between logic controller and
PCMCIA cards not shown.
A V
CC3
IN
A V
CC5
IN
(
OPTIONAL
)
A EN1
A EN0
A V
CC5
EN
Dual-Slot
PC Card
Logic Controller
A V
CC3
EN
B EN1
B EN0
B V
CC5
EN
B V
CC3
EN
(
OPTIONAL
)
B V
CC3
IN
B V
CC5
IN
A V
PP
OUT
A V
CC
OUT
MIC2568
Power
Controller
System Power Supply
3.3V
(
OPTIONAL
)
5V
Slot A
V
PP
1
V
PP
2
V
CC
V
CC
PC Card
A
GND
Slot B
B V
PP
OUT
B V
CC
OUT
V
PP
1
V
PP
2
V
CC
V
CC
PC Card
B
Motherboard
Dual-Slot PC Card Power Control
UL Recognized Component
Micrel, Inc. • 1849 Fortune Drive • San Jose, CA 95131 • USA • tel + 1 (408) 944-0800 • fax + 1 (408) 944-0970 • http://www.micrel.com
May 2003
1
MIC2568
MIC2568
Micrel
Ordering Information
Part Number
MIC2568-0BSM
MIC2568-1BSM
MIC2568-0YSM
MIC2568-1YSM
MIC2568-0BTS
MIC2568-1BTS
Operating
Temperature Range
–40°C to +85°C
–40°C to +85°C
–40°C to +85°C
–40°C to +85°C
–40°C to +85°C
–40°C to +85°C
Package
28-pin SSOP
28-pin SSOP
28-pin SSOP
28-pin SSOP
28-pin TSSOP
28-pin TSSOP
X
X
Pb-Free
Pin Configuration
A V
CC5
IN
A V
CC
OUT
A V
CC5
IN
GND
A V
CC5
EN
A V
CC3
EN
A EN0
A EN1
NC
B V
PP
OUT
NC
B V
CC
OUT
B V
CC3
IN
B V
CC
OUT
1
2
3
4
5
6
7
8
9
10
11
12
13
14
*
*
28
27
26
25
24
23
* 22
* 21
20
19
18
17
16
15
A V
CC
OUT
A V
CC3
IN
A V
CC
OUT
NC
A V
PP
OUT
NC
B EN1
B EN0
B V
CC3
EN
B V
CC5
EN
GND
B V
CC5
IN
B V
CC
OUT
B V
CC5
IN
A V
CC5
IN
A V
CC
OUT
A V
CC5
IN
GND
A V
CC5
EN
A V
CC3
EN
A V
PP
_V
CC
A V
PP
_PGM
NC
B V
PP
OUT
NC
B V
CC
OUT
B V
CC3
IN
B V
CC
OUT
1
2
3
4
5
6
7
8
9
10
11
12
13
14
*
*
28
27
26
25
24
23
* 22
* 21
20
19
18
17
16
15
A V
CC
OUT
A V
CC3
IN
A V
CC
OUT
NC
A V
PP
OUT
NC
B V
PP
_PGM
B V
PP
_V
CC
B V
CC3
EN
B V
CC5
EN
GND
B V
CC5
IN
B V
CC
OUT
B V
CC5
IN
MIC2568-0
Example: "A V
CC5
IN" pins 1 and 3 must be connected.
MIC2568-1
* Denotes pinout differences. Duplicate pins must be connected together for proper operation.
Pin Description
Pin Number
MIC2568-0
1, 3 / 15, 17
Pin Number
MIC2568-1
1, 3 / 15, 17
Pin Name
A / B V
CC5
IN
A / B V
CC
OUT
Pin Function
5V Nominal Supply Input: Optional supply, switchable to V
CC
and V
PP
outputs.
V
CC
Output: 0V (ground), 3.3V, 5V, or high-impedance output. Pins 2, 26,
and 28 must be externally connected. Pins 12, 14, and 16 must be externally
connected.
Ground.
V
CC
5V Enable (Input).
V
CC
3.3V Enable (Input).
Enable 0: Micrel standard logic-control signal. MIC2568-0 only.
V
PP
_V
CC
Control: Cirrus Logic logic-controller compatible control signal.
MIC2568-1 only.
Enable 1: Micrel standard logic-control signal. MIC2568-0 only.
Program: Cirrus Logic-compatible control signal. MIC2568-1 only.
V
PP
Output: 0V (ground), 3.3V, 5V, or high-impedance output.
Not internally connected.
3.3V Nominal Supply Input: Mandatory supply, switchable to V
CC
and V
PP
outputs. Also powers MIC2568 internal circuitry.
2,26,28/12,14,16 2,26,28/12,14,16
4, 18
5 / 19
6 / 20
7 / 21
4, 18
5 / 19
6 / 20
GND
A / B V
CC5
EN
A / B V
CC3
EN
A / B EN0
A / B V
PP
_V
CC
A / B EN1
7 / 21
8 / 22
8 / 22
24 / 10
9, 11, 23, 25
27 / 13
24 / 10
9, 11, 23, 25
27 / 13
A / B V
PP
_PGM
A / B V
PP
OUT
NC
A / B V
CC3
IN
MIC2568
2
May 2003
MIC2568
Micrel
Absolute Maximum Ratings
(Note 1)
V
CC5
IN [5V] Supply Voltage (V
CC5 IN
) .......................... +6V
V
CC3
IN [3.3V] Supply Voltage (V
CC3 IN
) ....................... +6V
Logic Input Voltages (V
CCx EN
, V
ENx
) ............ –0.3V to +6V
Storage Temperature (T
S
) ....................... –65°C to +150°C
Lead Temperature (5 sec.) ........................................ 260°C
ESD Rating,
Note 3
Operating Ratings
(Note 2)
V
CC5
IN [5V] Supply Voltage (V
CC5 IN
),
Note 5
............................................................ +4.5V to +5.5V
V
CC3
IN [3.3V] Supply Voltage (V
CC3 IN
),
Note 6
............................................................ +3.0V to +5.5V
Ambient Temperature Range (T
A
) ............. –40°C to +85°C
Junction Temperature (T
J
) ....................... Internally Limited
Thermal Resistance
SSOP (θ
JA
) .......................................................... 84°C/W
TSSOP (θ
JA
) ..................................................... 100°C/W
Electrical Characteristics
(Note 4)
V
CC3 IN
= 3.3V, V
CC5 IN
= 5.0V; specified over operating temperature range of –40°C to +85°C.
Symbol
Digital Inputs
V
IH
V
IL
I
IN
V
PP
Output
I
PP
OUT
Hi-Z
I
PPSC
R
O
High Impedance Output
Leakage Current
Short Circuit Current Limit
Switch Resistance
Shutdown mode
0
≤
V
PP OUT
= 0V
V
PP OUT
= 0V
V
PP OUT
= 5V selected,
I
PP OUT
= –100mA (sourcing)
V
PP OUT
= 3.3V selected,
I
PP OUT
= –100mA (sourcing)
V
PP OUT
= 0V [ground] selected,
I
PP OUT
= 50µA (sinking)
V
PP
Switching Time
(See Figure 1)
t
1
t
2
t
3
t
4
t
5
t
6
t
7
t
8
V
CC
Output
I
CCSC
R
O
Short Circuit Current Limit
Switch Resistance
V
CC OUT
= 0V, normal mode,
V
CC3
or V
CC5
switches
V
CC OUT
= 3.3V selected,
I
CC OUT
= –1A (sourcing)
V
CC OUT
= 5V selected,
I
CC OUT
= –1A (sourcing)
V
CC OUT
= 0V [ground] selected,
I
CC OUT
= 0.1mA (sinking)
1.0
1.5
120
90
1800
180
135
3900
A
mΩ
mΩ
Ω
Output Turnoff Delay Time,
Notes 7, 8
Output Turnoff Fall Time,
Note 7
Output Rise Time,
Note 7
Output Turn-On Delay,
Note 7
V
PP OUT
= Hi-Z to 10% of 3.3V
V
PP OUT
= Hi-Z to 10% of 5V
V
PP OUT
= 10% to 90% of 3.3V
V
PP OUT
= 10% to 90% of 5V
V
PP OUT
= 90% to 10% of 3.3V
V
PP OUT
= 90% to 10% of 5V
V
PP OUT
= 3.3V to Hi-Z
V
PP OUT
= 5V to Hi-Z
100
100
5
10
200
300
50
50
400
400
50
50
800
1000
1000
1000
1000
1000
µs
µs
µs
µs
ns
ns
ns
ns
0.12
1
0.3
1.4
1.5
1300
4
4
3900
10
µA
A
Ω
Ω
Ω
Logic-1 Input Voltage
Logic-0 Input Voltage
Input Current
V
CC3 IN
= 3.0V to 5.5V
V
CC3 IN
= 3.0V to 5.5V
0V
≤
V
IN
≤
5.5V
0.7V
CC3 IN
–0.3
5.5
0.3V
CC3 IN
±2
V
V
µA
Parameter
Conditions
Min
Typ
Max
Units
May 2003
3
MIC2568
MIC2568
Symbol
Parameter
Conditions
Min
Typ
Max
Micrel
Units
µs
µs
µs
µs
µs
µs
ms
ms
µA
µA
µA
µA
°C
V
CC
Switching Time
(See Figure 2)
t
9
t
10
t
11
t
12
t
13
t
14
t
15
t
16
Power Supply
I
CC5
I
CC3
V
CC5
IN Supply Current (5V)
Note 5
V
CC3
IN Supply Current (3.3V)
Note 6
V
CC OUT
= 5V or 3.3V, I
CC OUT
= 0
V
CC OUT
= 0V (sleep mode)
V
CC OUT
= 5V or 3.3V, I
CC OUT
= 0
V
CC OUT
= 0V (sleep mode)
8
0.2
40
0.1
50
10
100
10
Output Turnoff Delay,
Notes 8, 9
Output Fall Time,
Note 9
Output Turn-On Delay Time,
Note 9
Output Rise Time,
Note 9
V
CC OUT
= 0V to 10% of 3.3V
V
CC OUT
= 0V to 10% of 5.0V
V
CC OUT
= 10% to 90% of 3.3V
V
CC OUT
= 10% to 90% of 5V
V
CC OUT
= 90% to 10% of 3.3V
V
CC OUT
= 90% to 10% of 5.0V
V
CC OUT
= 3.3V
V
CC OUT
= 5V
200
200
100
100
300
750
700
1500
300
600
0.65
0.7
1500
3000
2500
6000
1000
2000
2
2
Thermal Shutdown
T
SD
Note 1.
Note 2.
Note 3.
Note 4.
Note 5.
Note 6.
Note 7.
Note 8.
Note 9.
Thermal Shutdown Temperature
Exceeding the absolute maximum rating may damage the device.
The device is not guaranteed to function outside its operating rating.
Devices are ESD sensitive. Handling precautions recommended.
Specification for packaged product only.
V
CC5 IN
is not required for operation.
V
CC3 IN
powers all internal logic, bias, and drive circuitry, and is required for operation.
R
L
= 1kΩ connected to ground.
140
Measurement is from the Hi-Z- or 0V-state command to the beginning of the slope. Measurement does not apply when device is in current
limit or thermal shutdown.
R
L
= 10Ω connected to ground.
MIC2568
4
May 2003
MIC2568
Micrel
Output Timing Diagrams
A
V
PP
Enable
0
V
PP
to 3.3V
B
V
PP
OFF
C
V
PP
to 5V
D
V
PP
OFF
t
5
V
PP
OUT
t
1
5V
3.3V
t
3
t
7
t
2
t
4
t
6
t
8
0
Figure 1. V
PP
Timing Diagram
V
PP EN
is shown generically. R
L
= 100Ω. Load capacitance is negligible. Refer to “MIC2568-0 Logic Table” for specific control
logic input.
At time
A)
V
PP
= 3.3V,
B)
V
PP
is disabled,
C)
V
PP
is programmed to 5V,
D)
V
PP
is disabled.
A
V
CC
Enable
0
B
C
D
V
CC
to 3.3V
t
9
t
11
V
CC
OFF
t
15
t
13
V
CC
to 5V
t
10
t
12
V
CC
OFF
t
16
t
14
5V
V
CC
3.3V
OUT
0
FLAG
0
Figure 2. V
CC
Timing Diagram
V
CC EN
is shown generically. R
L
= 10Ω. Refer to “MIC2568-0 Logic Table” for specific control logic input.
At time
A)
V
CC
is programmed to 3.3V,
B)
V
CC
is disabled,
C)
V
CC
is programmed to 5V,
D)
V
CC
is disabled.
May 2003
5
MIC2568
嵌入式系统
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