MIC2562A
Micrel
MIC2562A
54
July 1999
MIC2562A
PCMCIA/CardBus Socket Power Controller
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
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
Small 14-Pin SOIC Package
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
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.
System
Power
Supply
PCMCIA
Card Slot
Controller
MIC2562
PCMCIA
Card Slot
5V
3.3V
12V
(opt)
EN0
EN1
VPP1
VCC
VPPIN
(opt)
VCC5IN
VCC3IN
VCC5_EN
VCC3_EN
VPP2
Typical Application
Pin Configuration
14 Pin S.O. Package
GND
7
6
5
4
3
2
11
10
12
13
14
8
9
V
CC5
IN
V
CC
OUT
V
CC5_EN
V
CC3_EN
*
*
FLAG
V
PP
IN
V
CC
OUT
V
CC3
IN
V
PP
OUT
V
CC
OUT
V
CC5
IN
* see table below
Ordering Information
Part Number
Temperature Range
Package
MIC2562A-0BM
40
C to +85
C
14-pin Narrow SOIC
MIC2562A-1BM
40
C to +85
C
14-pin Narrow SOIC
Note: see the logic table inside for a description of the differences
between the logic options
s
t
n
e
m
n
g
i
s
s
A
n
i
P
A
2
6
5
2
C
I
M
n
i
P
0
-
1
-
3
0
N
E
V
C
C
V
_
P
P
4
1
N
E
V
M
G
P
_
P
P
Both V
CC5
IN pins must be connected.
All three V
CC
OUT pins must be connected.
July 1999
55
MIC2562A
MIC2562A
Micrel
Absolute Maximum Ratings
(Notes 1 and 2)
Power Dissipation, T
AMBIENT
25
C ......
Internally Limited
SOIC ............................................................... 800 mW
Derating Factors (To Ambient)
SOIC .............................................................. 4 mW/
C
Storage Temperature .............................. 65
C to +150
C
Operating Temperature (Die) ................................... 125
C
Lead Temperature (5 sec) ........................................ 260
C
Supply Voltage, V
PP IN ......................................................
15V
V
CC3
IN ................................................................ 7.5V
V
CC5
IN ................................................................ 7.5V
FLAG Pull-up Voltage ................................................. 7.5V
Logic Input Voltages ..................................... 0.3V to +10V
Output Current (each Output)
V
PP OUT
............................
>200mA, Internally Limited
V
CC OUT ......................................
>1A, Internally Limited
Logic Block Diagram
VCC5_EN
VCC3_EN
VCC3 IN
EN1
VPP OUT
VCC OUT
VPP IN
(optional)
EN0
VCC5 IN
MIC2562
Control
Logic
FLAG
ILimit / Thermal
Shut Down
Gate Drive
Generator
MIC2562A
Micrel
MIC2562A
56
July 1999
Electrical Characteristics:
(Over operating temperature range with V
CC3
IN
= 3.3V, V
CC5
IN = 5.0V, V
PP
IN = 12V, unless
otherwise specified.)
Symbol
Parameter
Conditions
Min
Typ
Max
Units
DIGITAL INPUTS
V
IH
Logic 1 Input Voltage
2.2
7.5
V
V
IL
Logic 0 Input Voltage
0.3
0.8
V
I
IN
Input Current
0 V < V
IN
< 5.5V
1
A
V
PP
OUTPUT
I
PP OUT
High Impedance Output
Shutdown Mode
1
10
A
Hi-Z
Leakage Current
0
V
PP OUT
12V
I
PPSC
Short Circuit Current Limit
V
PP OUT
= 0
0.2
0.4
A
R
O
Switch Resistance,
Select V
PP OUT
= 5V
1.8
2.5
Select V
PP OUT
= 3.3V
3.3
5
I
PP OUT
= 100mA (Sourcing)
R
O
Switch Resistance,
V
PP IN
= 12V
0.6
1
Select V
PP OUT
= 12V
I
PP OUT
= 100 mA (Sourcing)
R
O
Switch Resistance,
Select V
PP OUT
= clamped to ground
2500
3900
Select V
PP OUT
= 0V
I
PP OUT
= 50
A (Sinking)
V
PP
SWITCHING TIME (See Figure 1)
t
1
Output Turn-ON Delay
V
PP OUT
= Hi-Z to 10% of 3.3V
5
50
s
t
2
(Note 3)
V
PP OUT
= Hi-Z to 10% of 5V
10
50
t
3
V
PP OUT
= Hi-Z to 10% of 12V
70
250
t
4
Output Rise Time
V
PP OUT
= 10% to 90% of 3.3V
100
200
800
s
t
5
(Note 3)
V
PP OUT
= 10% to 90% of 5V
100
300
1000
t
6
V
PP OUT
= 10% to 90% of 12V
100
225
800
t
7
Output Transition Timing
V
PP OUT
= 3.3V to 90% of 12V
100
250
1000
s
t
8
(Note 3)
V
PP OUT
= 5V to 90% of 12V
100
200
800
t
9
V
PP OUT
= 12V to 90% of 3.3V
100
200
800
t
10
V
PP OUT
= 12V to 90% of 5V
100
350
1200
t
14
Output Turn-Off Delay Time
V
PP OUT
= 3.3V to Hi-Z
200
1000
ns
t
15
(Note 3)
V
PP OUT
= 5V to Hi-Z
200
1000
t
16
V
PP OUT
= 12V to Hi-Z
200
1000
t
11
Output Turn-OFF Fall Time
V
PP OUT
= 90% to 10% of 3.3V
50
1000
ns
t
12
(Note 3)
V
PP OUT
= 90% to 10% of 5V
50
1000
t
13
V
PP OUT
= 90% to 10% of 12V
300
2000
July 1999
57
MIC2562A
MIC2562A
Micrel
Electrical Characteristics (continued)
Symbol
Parameter
Conditions
Min
Typ
Max
Units
V
CC
OUTPUT
I
CCSC
Short Circuit Current Limit
V
CC OUT
= 0
1
1.5
A
R
O
Switch Resistance
Select V
CC OUT
= 3.3V
100
150
m
I
CC OUT
= 1A (Sourcing)
Select V
CC OUT
= 5V
70
100
m
I
CC OUT
= 1A (Sourcing)
Select V
CC OUT
= clamped to ground
500
3900
I
CC OUT
= 0.1mA (Sinking)
V
CC
SWITCHING TIME (See Figure 2)
t
1
Output Turn ON Delay Time
V
CC OUT
= 0V to 10% of 3.3V
300
1500
s
t
2
(Note 4)
V
CC OUT
= 0V to 10% of 5.0V
750
3000
t
3
Output Rise Time
V
CC OUT
= 10% to 90% of 3.3V
200
700
2500
s
(Note 4)
t
4
V
CC OUT
= 10% to 90% of 5V
200
1500
6000
t
7
Output Turn-Off Delay
V
CC OUT
= 3.3V
2.4
8
ms
(Notes 4, 5)
t
8
V
CC OUT
= 5V
2.8
8
t
5
Output Fall Time
V
CC OUT
= 90% to 10% of 3.3V
100
240
1000
s
(Note 4)
t
6
V
CC OUT
= 90% to 10% of 5.0V
100
600
2000
POWER SUPPLY
I
CC5
V
CC5 IN
Supply Current (5V)
V
CC OUT
= 5V or 3.3V, I
CC OUT
= 0
8
50
A
V
CC OUT
= 0V (Sleep Mode)
0.2
10
I
CC3
V
CC3 IN
Supply Current (3.3V)
V
CC OUT
= 5V or 3.3V, I
CC OUT
= 0
40
100
A
(Note 6)
V
CC OUT
= 0V (Sleep Mode)
0.1
10
I
PP
IN
V
PP IN
Supply Current (12V)
V
PP OUT
= 3.3V or 5V. I
PP OUT
= 0
0.3
4
A
(Note 7)
V
PP OUT
= Hi-Z, 0 or V
PP
0.3
4
V
CC5
Operating Input Voltage (5V)
V
CC5 IN
not required for operation
--
5.0
6
V
V
CC3
Operating Input Voltage (3.3V)
(Note 6)
3.0
3.3
6
V
V
PP IN
Operating Input Voltage (12V)
V
PP IN
not required for operation
--
12.0
14.5
V
(Note 8)
MIC2562A
Micrel
MIC2562A
58
July 1999
Electrical Characteristics (continued)
Symbol
Parameter
Conditions
Min
Typ
Max
Units
THERMAL SHUTDOWN
T
SD
Thermal Shutdown Temperature
130
C
FLAG OUTPUT
V
O
OK
FLAG Threshold Voltage
FLAG High (OK) Threshold voltage
V
CC
1
V
(Note 9)
V
PP
1
NOTE 1:
Functional operation above the absolute maximum stress ratings is not implied.
NOTE 2:
Static-sensitive device. Store only in conductive containers. Handling personnel and equipment should be grounded to
prevent damage from static discharge.
NOTE 3:
R
L
= 100
connected to ground.
NOTE 4:
R
L
= 10
connected to ground.
NOTE 5:
Delay from commanding Hi Z or 0V to beginning slope. Does not apply to current limit or overtemperature shutdown
conditions.
NOTE 6:
The MIC2562A uses V
CC3 IN
for operation. For single 5V supply systems, connect 5V to both V
CC3
IN
and V
CC5IN
. See Applica-
tions Information for further details.
NOTE 7:
V
PP IN
is not required for operation.
NOTE 8:
V
PP IN
must be either high impedance or greater than or approximately equal to the highest voltage V
CC
in the system. For
example, if both 3.3V and 5V are connected to the MIC2562A, V
PP IN
must be either 5V, 12V, or high impedance.
NOTE 9:
A 10k
pull-up resistor is connected between FLAG and V
CC3
IN.
A
B
C
D
t1
VPP
Enable
VPP
Output
FLAG
VPP to 3.3V
VPP to 12V
12V
5V
3.3V
0
0
VPP to 5V
VPP
OFF
VPP to 12V
VPP OFF
E
F
G
J
H
t6
t9
t13
VPP OFF
t3
VPP to 5V
VPP to 3.3V
VPP to 12V
t4
t7
t14
t11
t2
t5
t8
t10
t15
t12
t16
K
Figure 1. MIC2562A V
PP
Timing Diagram. V
PP
Enable is shown generically: refer to the timing tables (below). At
time "A" V
PP
= 3.3V is selected. At B, V
PP
is set to 12V. At C, V
PP
= 3.3V (from 12V). At D, V
PP
is disabled. At E, V
PP
is
programmed to 5V. At F, V
PP
is set to 12V. At G, V
PP
is programmed to 5V. At H, V
PP
is disabled. At J, V
PP
is set to
12V. And at K, V
PP
is again disabled. R
L
= 100
for all measurements. Load capacitance is negligible.
July 1999
59
MIC2562A
MIC2562A
Micrel
Figure 2. MIC2562A V
CC
Timing Diagram. V
CC
Enable is shown generically: refer to the timing tables (below) for
specific control logic input. At time A, V
CC
is programmed to 3.3V. At B, V
CC
is disabled. At C, V
CC
is programmed
to 5V. And at D, V
CC
is disabled. R
L
= 10
. FLAG pull-up resistor is 10k
to V
CC3
IN.
A
B
C
D
t1
t3
t7
t5
t2
t4
t8
t6
VCC
Enable
VCC
Output
FLAG
VCC to 3.3V
VCC to 5V
VCC OFF
VCC OFF
0
5V
3.3V
0
0
MIC2562A-0 Control Logic Table
V
CC5_EN
V
CC3_EN
EN1
EN0
V
CC OUT
V
PP OUT
0
0
0
0
Clamped to Ground
High Z
0
0
0
1
Clamped to Ground
High Z
0
0
1
0
Clamped to Ground
High Z
0
0
1
1
Clamped to Ground
Clamped to Ground
0
1
0
0
3.3
High Z
0
1
0
1
3.3
3.3
0
1
1
0
3.3
12
0
1
1
1
3.3
Clamped to Ground
1
0
0
0
5
High Z
1
0
0
1
5
5
1
0
1
0
5
12
1
0
1
1
5
Clamped to Ground
1
1
0
0
3.3
High Z
1
1
0
1
3.3
3.3
1
1
1
0
3.3
5
1
1
1
1
3.3
Clamped to Ground
MIC2562A
Micrel
MIC2562A
60
July 1999
MIC2562A-1 Control Logic (compatible with Cirrus Logic CL-PD6710 & PD672x-series
Controllers)
V
CC5_EN
V
CC3_EN
V
PP_PGM
V
PP_VCC
V
CC OUT
V
PP OUT
0
0
0
0
Clamped to Ground
Clamped to Ground
0
0
0
1
Clamped to Ground
High Z
0
0
1
0
Clamped to Ground
High Z
0
0
1
1
Clamped to Ground
High Z
0
1
0
0
5
Clamped to Ground
0
1
0
1
5
5
0
1
1
0
5
12
0
1
1
1
5
High Z
1
0
0
0
3.3
Clamped to Ground
1
0
0
1
3.3
3.3
1
0
1
0
3.3
12
1
0
1
1
3.3
High Z
1
1
0
0
Clamped to Ground
Clamped to Ground
1
1
0
1
Clamped to Ground
High Z
1
1
1
0
Clamped to Ground
High Z
1
1
1
1
Clamped to Ground
High Z
Pin 1
Pin 2
Pin 3
Pins 8, 10, 12
Pin 7
V
CCSEL0(1)
V
PPSEL0(1)
V
CCSEL2(3)
V
CC OUT
V
PP OUT
0
1
0
Hi-Z
Clamped to Ground
1
1
0
3.3V
3.3V
0
0
0
3.3V
12V
1
0
0
3.3V
Clamped to Ground
0
1
1
Hi-Z
Clamped to Ground
1
1
1
5V
5V
0
0
1
5V
12V
1
0
1
5V
Clamped to Ground
MIC2562A-2 Logic (Compatible with Databook Controllers)
The Databook DB86184 PCMCIA controller requires two 100k
pull-down resistors from pins 5 and 7 to
ground and a 100k
pull-up resistor from pin 6 to +3.3V (or +5V). Connect MIC2560-2 pin 8 to ground.
July 1999
61
MIC2562A
MIC2562A
Micrel
Applications Information
PC Card V
CC
and V
PP
control is easily accomplished using
the MIC2562A PC Card/CardBus Slot V
CC
& V
PP
Power
Controller IC. Four control bits determine V
CC OUT
and V
PP
OUT
voltage and standby/operate mode condition. V
CC
out-
puts of 3.3V and 5V at the maximum allowable PC Card
current are supported. V
PP OUT
output voltages of V
CC
(3.3V
or 5V), V
PP
, 0V, or a high impedance state are available.
When the V
CC
clamped to ground condition is selected, the
device switches into "sleep" mode and draws only nano-
amperes of leakage current. An error flag alerts the user if the
output voltage is too low because of overtemperature or
overcurrent faults. Protection from hot switching is provided
which prevents feedback from the V
CC OUT
(from 5V to 3.3V,
for example) by locking out the low voltage switch until the
initial switch's gate voltage drops below the desired lower
V
CC
.
The MIC2562A operates from the computer system main
power supply. Device logic and internal MOSFET drive is
generated internally by charge pump voltage multipliers
powered from V
CC3
IN. Switching speeds are carefully con-
trolled to prevent damage to sensitive loads and meet all PC
Card Specification speed requirements.
Supply Bypassing
External capacitors are not required for operation. The
MIC2562A is a switch and has no stability problems. For best
results however, bypass V
CC3
IN, V
CC5
IN, and V
PP
IN inputs
with 1
F capacitors to improve output ripple. As all internal
device logic and comparison functions are powered from the
V
CC3
IN line, the power supply quality of this line is the most
important, and a bypass capacitor may be necessary for
some layouts. Both V
CC OUT
and V
PP OUT
pins may use
0.01
F to 0.1
F capacitors for noise reduction and electro-
static discharge (ESD) damage prevention. Larger values of
output capacitors are not necessary.
PC Card Slot Implementation
The MIC2562A is designed for full compatibility with the
Personal Computer Memory Card International Associa-
tion's (PCMCIA) PC Card Specification, (March 1995), in-
cluding the CardBus option. One MIC2562A is required for
each PC Card slot.
When a memory card is initially inserted, it should receive
V
CC
-- either 3.3V
0.3V or 5.0V
5%. The initial voltage is
determined by a combination of mechanical socket "keys"
and voltage sense pins. The card sends a handshaking data
stream to the controller, which then determines whether or
not this card requires V
PP
and if the card is designed for dual
V
CC
. If the card is compatible with and desires a different V
CC
level, the controller commands this change by disabling V
CC
,
waiting at least 100ms, and then re-enabling the other V
CC
voltage.
V
CC
switches are turned ON and OFF slowly. If commanded
to immediately switch from one V
CC
to the other (without
turning OFF and waiting 100ms first), enhancement of the
second switch begins after the first is OFF, realizing break-
before-make protection. V
PP
switches are turned ON slowly
and OFF quickly, which also prevents cross conduction.
If no card is inserted or the system is in sleep mode, the slot
logic controller outputs a (V
CC3
IN, V
CC5
IN) = (0,0) to the
MIC2562A, which shuts down V
CC
. This also places the
switch into a high impedance output shutdown (sleep) mode,
where current consumption drops to nearly zero, with only
tiny CMOS leakage currents flowing.
Internal device control logic and MOSFET drive and bias
voltage is powered from V
CC3
IN. The high voltage bias is
generated by an internal charge pump quadrupler. Systems
without 3.3V may connect V
CC3
IN to 5V. Input logic threshold
voltages are compatible with common PC Card logic control-
lers using either 3.3V or 5V supplies.
The PC Card Specification defines two V
PP
supply pins per
card slot. The two V
PP
supply pins may be programmed to
different voltages. V
PP
is primarily used for programming
FLASH memory cards. Implementing two independent V
PP
voltages is easily accomplished with the MIC2562A and a
MIC2557 PCMCIA V
PP
Switching Matrix. Figure 3 shows this
full configuration, supporting independent V
PP
and both 5.0V
and 3.3V V
CC
operation. However, few logic controllers
support multiple V
PP
--most systems connect V
PP1
to V
PP2
and the MIC2557 is not required. This circuit is shown in
Figure 4.
During Flash memory programming with standard (+12V)
Flash memories, the PC Card slot logic controller outputs a
(0,1) to the EN0, EN1 control pins of the MIC2562A, which
connects V
PP
IN (nominally +12V) to V
PP OUT
. The low ON
resistance of the MIC2562A switch allows using a small
bypass capacitor on the V
PP OUT
pins, with the main filtering
action performed by a large filter capacitor on V
PP
IN (usually
the main power supply filter capacitor is sufficient). Using a
small-value capacitor such as 0.1
F on the output causes
little or no timing delays. The V
PP OUT
transition from V
CC
to
12.0V typically takes 250
s. After programming is com-
pleted, the controller outputs a (EN1, EN0) = (0,1) to the
MIC2562A, which then reduces V
PP OUT
to the V
CC
level.
Break-before-make switching action and controlled rise times
reduces switching transients and lowers maximum current
spikes through the switch.
Figure 5 shows MIC2562A configuration for situations where
only a single +5V V
CC
is available.
Output Current and Protection
MIC2562A output switches are capable of passing the maxi-
mum current needed by any PC Card. The MIC2562A meets
or exceeds all PCMCIA specifications. For system and card
protection, output currents are internally limited. For full
system protection, long term (millisecond or longer) output
short circuits invoke overtemperature shutdown, protecting
the MIC2562A, the system power supplies, the card socket
pins, and the PC Card. A final protective feature is the error
FLAG, which signals the PC Card slot logic controller when
a fault condition exists, allowing the controller to notify the
user that the card inserted has a problem. The open-drain
FLAG monitors the voltage level on both V
CC OUT
and V
PP
OUT
and activates (pulls low) when either output is 1V below
its programmed level or an overtemperature fault exists.
This FLAG signals output voltage transitions as well as fault
conditions. Refer to Figures 1 and 2 for details.
MIC2562A
Micrel
MIC2562A
62
July 1999
System
Power
Supply
PCMCIA
Card Slot
Controller
MIC2562
PCMCIA
Card Slot
5V
3.3V
12V
EN0
EN1
VPP1
VCC
VPPIN
(opt)
VCC5IN
VCC3IN
VCC5_EN
VCC3_EN
VPP2
MIC2557
EN0
EN1
VPP IN VDD
VPP OUT
VCC
System
Power
Supply
PCMCIA
Card Slot
Controller
MIC2562
PCMCIA
Card Slot
5V
3.3V
12V
(opt)
EN0
EN1
VPP1
VCC
VPPIN
(opt)
VCC5IN
VCC3IN
VCC5_EN
VCC3_EN
VPP2
Figure 3. MIC2562A PC Card slot power control applica-
tion with dual V
CC
(5V and 3.3V) and separate V
PP1
and
V
PP2
.
Figure 4. Typical MIC2562A PC Card slot power control
application with dual V
CC
(5V and 3.3V). Note that V
PP1
and
V
PP2
are driven together.
System
Power
Supply
PCMCIA
Card Slot
Controller
MIC2562
PCMCIA
Card Slot
5V
12V
(opt)
EN0
EN1
VPP1
VCC
VPPIN
(opt)
VCC5IN
VCC3IN
VCC5_EN
VCC3_EN
VPP2
Figure 5. PC Card slot power control application without an available 3.3V V
CC
. Note that V
CC3 IN
and V
CC5 IN
are driven
together. The MIC2562A is powered by the V
CC3 IN
line. In this configuration, V
CC OUT
will be 5V when either V
CC3
or V
CC5
is enabled from the logic table. Take advantage of the lower switch resistance of the V
CC5
switch by using the V
CC5_EN
control as your main V
CC
switch.
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