MIC2560
Micrel
November 1999
1
MIC2560
MIC2560
PCMCIA Card Socket V
CC
and V
PP
Switching Matrix
Applications
PCMCIA power supply pin voltage switch
Font cards for printers and scanners
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 sanagement
Power analog switching
Features
Complete PCMCIA V
CC
and V
PP
switch matrix
in a single IC
No external components required
Logic compatible with industry standard
PCMCIA controllers
No voltage overshoot or switching transients
Break-before-make switching
Output current limit and overtemperature shutdown
Digital flag for error condition indication
Ultralow power consumption
Digital selection of V
CC
and V
PP
voltages
Over 1A V
CC
output current
200mA V
PP
(12V) output current
Options for direct compatibility with
industry standard PCMCIA controllers
16-Pin SO package
General Description
The MIC2560 V
CC
and V
PP
Matrix controls PCMCIA (Per-
sonal Computer Memory Card International Association)
memory card power supply pins, both V
CC
and V
PP
. The
MIC2560 switches voltages from the system power supply to
V
CC
and V
PP
. The MIC2560 switches between the three V
CC
voltages (OFF, 3.3V and 5.0V) and the V
PP
voltages (OFF,
0V, 3.3V, 5V, or 12.0V) required by PCMCIA cards. Output
voltage is selected by two digital inputs for each output and
output current ranges up to 1A for V
CC
and 200mA for V
PP
.
The MIC2560 provides power management capability under
the control of the PC Card controller and features overcurrent
and thermal protection of the power outputs, zero current
"sleep" mode, suspend mode, low power dynamic mode, and
on-off control of the PCMCIA socket power.
The MIC2560 is designed for efficient operation. In standby
(sleep) mode the device draws very little quiescent current,
typically 0.01
A. The device and PCMCIA ports are pro-
tected by current limiting and overtemperature shutdown.
Full cross-conduction lockout protects the system power
supply.
Typical Application
MIC2560
Power
Controller
GND
V
PP
IN
V
CC3
IN
V
CC5
IN
12V
3.3V
5V
System Power Supply
EN0
PCMCIA
Card Slot
Controller
V
PP
OUT
V
CC
OUT
PCMCIA
Card
V
PP
1
V
PP
2
V
CC
Motherboard
Address and data lines
between logic controller and
PCMCIA cards not shown.
EN1
V
CC5
EN
V
CC3
EN
Micrel, Inc. 1849 Fortune Drive San Jose, CA 95131 USA tel + 1 (408) 944-0800 fax + 1 (408) 944-0970 http://www.micrel.com
Ordering Information
Part Number
Junction Temp. Range*
Package
MIC2560-0BWM
40
C to +70
C
16-lead Wide SOP
MIC2560-1BWM
40
C to +70
C
16-lead Wide SOP
Refer to "Control Logic Table" for -0/-1 version explanation.
MIC2560
Micrel
MIC2560
2
November 1999
Logic Block Diagram
VCC3 IN
EN1
GND
VPP OUT
VCC OUT
VPP IN
VCC5_EN
EN0
VCC5 IN
VCC3_EN
Control
Logic
Flag
ILimit / Thermal Shut Down
0.5
0.7
0.07
2
0.04
Both V
CC3
IN pins must be connected.
All three V
CC
OUT pins must be connected.
Pin Configuration
1
V
CC3
IN
V
CC
OUT
V
CC3
IN
GND
V
CC5
EN
V
CC3
EN
EN0
EN1
16 V
CC
OUT
V
CC5
IN
V
CC
OUT
V
PP
OUT
V
PP
IN
NC
NC
FLAG
15
14
13
12
11
10
9
2
3
4
5
6
7
8
MIC2560
Micrel
November 1999
3
MIC2560
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
Input
V
IH
Logic 1 Input Voltage
2.2
15
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
1V
V
PP
OUT
12V
I
PPSC
Short Circuit Current Limit
V
PP OUT
= 0
0.2
A
R
O
Switch Resistance,
select V
PP
OUT = 12V
0.55
1
I
PP OUT
= 100mA (sourcing)
select V
PP
OUT
= 5V
0.7
1
select V
PP
OUT = 3.3V
2
3
R
O
Switch Resistance,
select V
PP OUT
= clamped to ground
0.75
2
k
I
PP OUT
= 50
A
V
PP
Switching Time
t
1
Output Turn-On Rise Time
V
PP
OUT = hi-Z to 5V
50
s
t
2
Output Turn-On Rise Time
V
PP
OUT = hi-Z to 3.3V
40
s
t
3
Output Turn-On Rise Time
V
PP
OUT = hi-Z to 12V
300
s
t
4
Output Rise Time
V
PP
OUT = 3.3V or 5V to 12V
300
s
V
CC
Output
I
CC OUT
High Impedance Output
1V
V
CC OUT
5V
1
10
A
Hi-Z
Leakage Current, Note 3
I
CCSC
Short Circuit Current Limit
V
CC OUT
= 0
1
2
A
R
O
Switch Resistance,
I
CC OUT
= 1000mA (sourcing)
70
100
m
V
CC OUT
= 5.0V
R
O
Switch Resistance,
I
CC OUT
= 1000mA (sourcing)
40
66
m
V
CC OUT
= 3.3V
V
CC
Switching Time
t
1
Rise Time
V
CC OUT
= 0V to 3.3V, I
OUT
= 1A
100
600
s
t
2
Rise Time
V
CC OUT
= 0V to 5.0V, I
OUT
= 1A
100
500
s
t
3
Fall Time
V
CC OUT
= 5.0V to 3.3V
300
s
t
4
Rise Time
V
CC OUT
= hi-Z to 5V
400
s
Absolute Maximum Ratings
(Notes 1 and 2)
Power Dissipation, T
AMBIENT
25
C ....
Internally Limited
SOP ............................................................. 800 mW
Derating Factors (To Ambient)
SOP ............................................................ 4 mW/
C
Storage Temperature ............................ 65
C to +150
C
Maximum Operating Temperature (Die) ................ 125
C
Operating Temperature (Ambient) .......... 40
C to +70
C
Lead Temperature (5 sec) ...................................... 260
C
Supply Voltage, V
PP IN ...................................................
15V
V
CC3
IN ....................................................... V
CC5
IN
V
CC5
IN ............................................................. 7.5V
Logic Input Voltages .................................. 0.3V to +15V
Output Current (each Output)
V
PP OUT ............................
>200mA, Internally Limited
V
CC OUT ...................................
>1A, Internally Limited
V
CC OUT
, Suspend Mode .............................. 600mA
MIC2560
Micrel
MIC2560
4
November 1999
Symbol
Parameter
Conditions
Min
Typ
Max
Units
Power Supply
I
CC5
V
CC5
IN Supply Current
I
CC OUT
= 0
0.01
10
A
I
CC3
V
CC3
IN Supply Current
V
CC OUT
= 5V or 3.3V, I
CC OUT
= 0
30
50
A
V
CC OUT
= hi-Z (Sleep mode)
0.01
10
A
I
PP
IN
V
PP
IN Supply Current
V
CC
active, V
PP OUT
= 5V or 3.3V
15
50
A
(I
PP OUT
= 0)
V
PP OUT
= hi-Z, 0 or V
PP
0.01
10
A
V
CC5
IN
Operating Input Voltage
V
CC5
IN
V
CC3
IN
V
CC3
IN
5.0
6
V
V
CC3
IN
Operating Input Voltage
V
CC3
IN
V
CC5
IN
2.8
3.3
V
CC5
IN
V
V
PP IN
Operating Input Voltage
8.0
12.0
14.5
V
Suspend Mode (Note 4)
I
CC3
Active Mode Current
V
PP IN
= 0V, V
CC5
= V
CC3
= 3.3V
30
A
V
CC3
= enabled
V
PP
= disabled (hi-Z or 0V)
R
ON
V
CC
V
CC OUT
R
ON
V
PP IN
= 0V, V
CC5
= V
CC3
= 3.3V
4.5
V
CC3
= enabled
V
PP
= disabled (hi-Z or 0V)
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.
Leakage current after 1,000 hours at 125
C may increase up to five times the initial limit.
Note 4.
Suspend mode is a pseudo-power-down mode the MIC2560 automatically allows when V
PP IN
= 0V, V
PP
OUT is deselected, and V
CC
OUT =
3.3V is selected. Under these conditions, the MIC2560 functions in a reduced capacity mode where V
CC
output of 3.3V is allowed, but at
lower current levels (higher switch on-resistance).
MIC2560
Micrel
November 1999
5
MIC2560
MIC2560-0 Control Logic Table
Pin 5
Pin 6
Pin 8
Pin 7
Pins 2 & 14
Pin 13
V
CC5_EN
V
CC3_EN
EN1
EN0
V
CC OUT
V
PP OUT
0
0
0
0
High Z
High Z
0
0
0
1
High Z
High Z
0
0
1
0
High Z
High Z
0
0
1
1
High Z
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
Pin 5
Pin 6
Pin 8
Pin 7
Pins 2 & 14
Pin 13
V
CC5_EN
V
CC3_EN
V
PP_PGM
V
PP_
V
CC
V
CC OUT
V
PP OUT
0
0
0
0
High Z
Clamped to Ground
0
0
0
1
High Z
High Z
0
0
1
0
High Z
High Z
0
0
1
1
High Z
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
High Z
Clamped to Ground
1
1
0
1
High Z
High Z
1
1
1
0
High Z
High Z
1
1
1
1
High Z
High Z
MIC2560-1 Logic (Compatible with Cirrus Logic CL-PD6710 & CL-PD6720 Controllers)
MIC2560
Micrel
MIC2560
6
November 1999
Figure 3. MIC2560 Typical PCMCIA memory card
application with dual V
CC
(5.0V or 3.3V) and separate
V
PP1
and V
PP2.
Applications Information
PCMCIA V
CC
and V
PP
control is easily accomplished using
the MIC2560 voltage selector/switch IC. Four control bits
determine V
CC OUT
and V
PP OUT
voltage and standby/
operate mode condition. V
PP OUT
output voltages of V
CC
(3.3V or 5V), V
PP
, or a high impedance state are available.
When the V
CC
high impedance condition is selected, the
device switches into "sleep" mode and draws only nano-
amperes of leakage current. An error flag falls low if the
output is improper, because of overtemperature or overcur-
rent faults. Full protection from hot switching is provided
which prevents feedback from the V
PP OUT
to the V
CC
inputs
(from 12V to 5V, for example) by locking out the low voltage
switch until V
PP OUT
drops below V
CC
. The V
CC
output is
similarly protected against 5V to 3.3V shoot through.
The MIC2560 is a low-resistance power MOSFET switching
matrix that operates from the computer system main power
supply. Device logic power is obtained from V
CC3
and
internal MOSFET drive is obtained from the V
PP
IN pin
(usually +12V) during normal operation. If +12V is not
available, the MIC2560 automatically switches into "sus-
pend" mode, where V
CC OUT
can be switched to 3.3V, but at
higher switch resistance. Internal break-before-make switches
determine the output voltage and device mode.
Supply Bypassing
External capacitors are not required for operation. The
MIC2560 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 filter capacitors to improve output ripple. As all internal
device logic and voltage/current comparison functions are
powered from the V
CC3
IN line, supply bypass of this line is
the most critical, and may be necessary in some cases. In the
most stubborn layouts, up to 0.47
F may be necessary. Both
V
CC OUT
and V
PP OUT
pins may have 0.01
F to 0.1
F
capacitors for noise reduction and electrostatic discharge
(ESD) damage prevention. Larger values of output capacitor
might create current spikes during transitions, requiring larger
bypass capacitors on the V
CC3
IN,
V
CC5
IN, and V
PP
IN pins.
PCMCIA Implementation
The MIC2560 is designed for compatibility with the Personal
Computer Memory Card International Association's (PCM-
CIA) Specification, revision 2.1 as well as the PC Card
Specification, (March 1995), including the CardBus option.
The Personal Computer Memory Card International Associa-
tion (PCMCIA) specification requires two V
PP
supply pins per
PCMCIA slot. V
PP
is primarily used for programming Flash
(EEPROM) memory cards. The two V
PP
supply pins may be
programmed to different voltages. Fully implementing PCM-
CIA specifications requires a MIC2560, a MIC2557 PCMCIA
V
PP
Switching Matrix, and a controller. Figure 3 shows this
full configuration, supporting both 5.0V and 3.3V V
CC
opera-
tion.
System
Power
Supply
PCMCIA
Card Slot
Controller
MIC2560
PCMCIA
Card Slot
5V
3.3V
12V
EN0
EN1
VPP1
VCC
VPPIN
VCC5IN
VCC3IN
VCC5_EN
VCC3_EN
VPP2
MIC2557
EN0
EN1
VPP IN VDD
VPP OUT
VCC
MIC2560
Micrel
November 1999
7
MIC2560
However, many cost sensitive designs (especially notebook/
palmtop computers) connect V
PP1
to V
PP2
and the MIC2557
is not required. This circuit is shown in Figure 4.
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.
If no card is inserted or the system is in sleep mode, the
controller outputs a (V
CC3
IN, V
CC5
IN) = (0,0) to the MIC2560,
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.
During Flash memory programming with standard (+12V)
Flash memories, the PCMCIA controller outputs a (1,0) to the
EN0, EN1 control pins of the MIC2560, which connects
V
PP
IN to V
PP OUT
. The low ON resistance of the MIC2560
switches allow using small bypass capacitors (in some cases,
none at all) on the V
CC OUT
and V
PP OUT
pins, with the main
filtering action performed by a large filter capacitor on the
input supply voltage to V
PP
IN (usually the main power supply
filter capacitor is sufficient). 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
MIC2560, which then reduces V
PP OUT
to the V
CC
level for
read verification. Break-before-make switching action re-
duces switching transients and lowers maximum current
spikes through the switch from the output capacitor. The flag
comparator prevents having high voltage on the V
PP
OUT
capacitor from contaminating the V
CC
inputs, by disabling the
low voltage V
PP
switches until V
PP
OUT
drops below the V
CC
level selected. The lockout delay time varies with the load
current and the capacitor on V
PP OUT
. With a 0.1
F capacitor
and nominal I
PP OUT
, the delay is approximately 250
s.
Internal drive and bias voltage is derived from V
PP
IN. Internal
device control logic is powered from V
CC3
IN. Input logic
threshold voltages are compatible with common PCMCIA
controllers using either 3.3V or 5V supplies. No pull-up
resistors are required at the control inputs of the MIC2560.
Output Current and Protection
MIC2560 output switches are capable of more current than
needed in PC Card applications (1A) and meet or exceed all
PCMCIA specifications. For system and card protection,
output currents are internally limited. For full system protec-
tion, long term (millisecond or longer) output short circuits
invoke overtemperature shutdown, protecting the MIC2560,
the system power supplies, the card socket pins, and the
memory card. Overtemperature shutdown typically occurs at
a die temperature of 115
C.
Single V
CC
Operation
For PC Card slots requiring only a single V
CC
, connect
V
CC3 IN
and V
CC5 IN
together and to the system V
CC
supply
(i.e., Pins 1, 3, and 15 are all connected to system V
CC
).
Either the V
CC5
switch or the V
CC3
switch may be used to
enable the card slot V
CC
; generally the V
CC3
switch is
preferred because of its lower ON resistance.
Suspend Mode
An additional feature in the MIC2560 is a pseudo power-down
mode, Suspend Mode, which allows operation without a V
PP
IN supply. In Suspend Mode, the MIC2560 supplies 3.3V to
V
CC
OUT whenever a V
CC
output of 3.3V is enabled by the
PCMCIA controller. This mode allows the system designer
the ability to turn OFF the V
PP
supply generator to save power
when it is not specifically required. The PCMCIA card re-
ceives V
CC
at reduced capacity during Suspend Mode, as the
switch resistance rises to approximately 4.5
.
System
Power
Supply
PCMCIA
Card Slot
Controller
MIC2560
PCMCIA
Card Slot
5V
3.3V
12V
EN0
EN1
VPP1
VCC
VPPIN
VCC5IN
VCC3IN
VCC5_EN
VCC3_EN
VPP2
Figure 4. MIC2560 Typical PCMCIA memory card application with dual V
CC
(5.0V or 3.3V). Note that V
PP1
and V
PP2
are
driven together.
MIC2560
Micrel
MIC2560
8
November 1999
7
6
5
4
3
2
11
10
12
13
14
15
16
8
9
MIC2560
0.01F
4.7k
1N914
1N914
0.1F
0.02F
Switched VPP IN
(Optional Schottky)
+5V
Drive Enable
Figure 5. Circuit for generating bias drive for the V
CC
switches when +12V is not readily available.
High Current V
CC
Operation Without a
+12V Supply
Figure 5 shows the MIC2560 with V
CC
switch bias provided
by a simple charge pump. This enables the system designer
to achieve full V
CC
performance without a +12V supply, which
is often helpful in battery powered systems that only provide
+12V when it is needed. These on-demand +12V supplies
generally have a quiescent current draw of a few milliam-
peres, which is far more than the microamperes used by the
MIC2560. The charge pump of figure 5 provides this low
current, using about 100
A when enabled. When V
PP OUT
=
12V is selected, however, the on-demand V
PP
generator
must be used, as this charge pump cannot deliver the current
required for Flash memory programming. The Schottky diode
may not be necessary, depending on the configuration of the
on-demand +12V generator and whether any other loads are
on this line.
MIC2560
Micrel
November 1999
9
MIC2560
Package Information
0.022 (0.559)
0.018 (0.457)
5
TYP
0.408 (10.363)
0.404 (10.262)
0.409 (10.389)
0.405 (10.287)
0.103 (2.616)
0.099 (2.515)
SEATING
PLANE
0.027 (0.686)
0.031 (0.787)
0.016 (0.046)
TYP
0.301 (7.645)
0.297 (7.544)
0.094 (2.388)
0.090 (2.286)
0.297 (7.544)
0.293 (7.442)
10
TYP
0.032 (0.813) TYP
0.330 (8.382)
0.326 (8.280)
7
TYP
0.050 (1.270)
TYP
0.015
(0.381)
R
0.015
(0.381)
MIN
PIN 1
DIMENSIONS:
INCHES (MM)
16-Pin Wide SOP (M)
MIC2560
Micrel
MIC2560
10
November 1999
MIC2560
Micrel
November 1999
11
MIC2560
MIC2560
Micrel
MIC2560
12
November 1999
MICREL INC.
1849 FORTUNE DRIVE
SAN JOSE, CA 95131
USA
TEL
+ 1 (408) 944-0800
FAX
+ 1 (408) 944-0970
WEB
http://www.micrel.com
This information is believed to be accurate and reliable, however no responsibility is assumed by Micrel for its use nor for any infringement of patents or
other rights of third parties resulting from its use. No license is granted by implication or otherwise under any patent or patent right of Micrel Inc.
November 1999 Micrel Incorporated
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