Micrel MIC2561-1YM Pcmcia card socket vcc and vpp switching matrix Datasheet

MIC2561
Micrel
MIC2561
PCMCIA Card Socket VCC and VPP Switching Matrix
Final Information
General Description
Applications
The MIC2561 VCC & VPP Matrix controls PCMCIA (Personal
Computer Memory Card International Association) memory
card power supply pins, both VCC and VPP. The MIC2561
switches voltages from the system power supply to VCC and
VPP. The MIC2561 switches between the three VCC voltages
(OFF, 3.3V and 5.0V) and the VPP 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 750mA for VCC and 200mA for VPP. For
higher VCC output current, please refer to the full-performance MIC2560.
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Features
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The MIC2561 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.
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The MIC2561 is designed for efficient operation. In standby
(“sleep”) mode the device draws very little quiescent current,
typically 0.01µA. The device and PCMCIA port is protected by
current limiting and overtemperature shutdown. Full crossconduction lockout protects the system power supply.
Ordering Information
Part Number
Standard
PCMCIA Power Supply Pin Voltage Switch
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
Power Analog Switching
Pb-free
Temp. Range
Package
MIC2561-0BM
MIC2561-0YM
0°C to +70°C
14-pin SOIC
MIC2561-1BM
MIC2561-1YM
0°C to +70°C
14-pin SOIC
Complete PCMCIA V
and V
Switch Matrix in a
CC
PP
Single IC
No External Components Required
Controlled Switching Times
Logic Options for Compatible with Industry Standard
PCMCIA Controllers
No Voltage Overshoot or Switching Transients
Break-Before-Make Switching
Output Current Limit and Over-Temperature Shutdown
Digital Flag for Error Condition Indication
Ultra Low Power Consumption
Digital Selection of VCC and VPP Voltages
Over 750mA of VCC Output Current
200mA of VPP Output Current
14-Pin SOIC Package
5V
System
Power 3.3V
Supply
12V
VPPIN VCC3IN VCC5IN
VPP1
EN0
VPP2
EN1
PCMCIA
Card Slot
MIC2561
PCMCIA
Card Slot
Controller
VCC
VCC5_EN
VCC3_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
January 2005
1
MIC2561
MIC2561
Micrel
Absolute Maximum Ratings
(Notes 1 and 2)
Supply Voltage, VPP IN ................................................... 15V
VCC3 IN ....................................................... VCC5 IN
VCC5 IN ............................................................. 7.5V
Logic Input Voltages .................................. –0.3V to +15V
Output Current (each Output)
VPP OUT .............................................. Internally Limited
VCC OUT ............................................ Internally Limited
VCC OUT, Suspend Mode .............................. 600mA
Power Dissipation, TAMBIENT ≤ 25°C .... Internally Limited
SOIC ............................................................ 800 mW
Derating Factors (To Ambient)
SOIC ........................................................... 4 mW/°C
Storage Temperature ............................ –65°C to +150°C
Maximum Operating Temperature (Die) ................ 125°C
Operating Temperature (Ambient) .............. 0°C to +70°C
Lead Temperature (5 sec) ...................................... 260°C
Pin Configuration
VCC5_EN
VCC3_EN
EN0
EN1
14
FLAG
VPP IN
VPP OUT
2
13
3
12
4
11
5
10
6
9
7
8
GND
VCC3 IN
VCC OUT
VCC3 IN
VCC OUT
VCC5 IN
VCC OUT
14-Pin SO Package
Note: Both VCC3 IN pins must be connected. All three VCC OUT pins must be connected.
Logic Block Diagram
VPP IN
550mΩ
EN1
VPP OUT
EN0
MIC2561
Control
Logic
700mΩ
VCC OUT
210mΩ
VCC5_EN
2Ω
VCC3_EN
VCC3 IN
110mΩ
VCC5 IN
Flag
MIC2561
ILimit / Thermal Shut Down
2
GND
January 2005
MIC2561
Micrel
Electrical Characteristics:
(Over operating temperature range with VCC3 IN = 3.3V, VCC5 IN = 5.0V, VPP IN = 12V unless
otherwise specified.)
Symbol
Parameter
Conditions
Min
Typ
Max
Units
INPUT
VIH
Logic 1 Input Voltage
2.2
15
V
VIL
Logic 0 Input Voltage
–0.3
0.8
V
IIN
Input Current
±1
µA
50
µA
0 V < VIN < 5.5V
VPP OUTPUT
IPP OUT
Hi-Z
High Impedance Output
Leakage Current
Shutdown Mode
0 ≤ VPP OUT ≤ 12V
0.1
IPPSC
Short Circuit Current Limit
VPP OUT = 0
0.2
RO
Switch Resistance,
IPP OUT = –1000mA (Sourcing)
Select VPP OUT = 12V
Select VPP OUT = 5V
Select VPP OUT = 3.3V
0.55
0.7
2
1
1
3
Ω
RO
Switch Resistance,
IPP OUT = 50µA (Sinking)
Select VPP OUT = Clamped to Ground
0.75
2
kΩ
A
VPP SWITCHING TIME (See Figure 1)
t1
Output Turn-On Rise Time
VPP OUT = Hi-Z to 5V
50
µs
t2
Output Turn-On Rise Time
VPP OUT = Hi-Z to 3.3V
40
µs
t3
Output Turn-On Rise Time
VPP OUT = Hi-Z to 12V
300
µs
t4
Output Rise Time
VPP OUT = 3.3V or 5V to 12V
30
µs
t5
Output Turn-Off Delay
VPP OUT = 12V to 3.3V or 5V
25
75
µs
t6
Output Turn-Off Delay
VPP OUT = 5V to Hi-Z
75
200
ns
VCC OUTPUT
ICC OUT
Hi-Z
High Impedance Output
Leakage Current
1 ≤ VCC OUT ≤ 5V
0.1
10
µA
ICCSC
Short Circuit Current Limit
VCC OUT = 0
1.5
2
A
RO
Switch Resistance,
VCC OUT = 5.0V
ICC OUT = –650 mA (Sourcing)
210
300
mΩ
RO
Switch Resistance,
VCC OUT = 3.3V
ICC OUT = –650 mA (Sourcing)
110
185
mΩ
January 2005
3
MIC2561
MIC2561
Micrel
Electrical Characteristics (continued)
Symbol
Parameter
Conditions
Min
Typ
Max
Units
VCC SWITCHING TIME
t1
Rise Time (10% to 90%)
VCC OUT = 0V to 3.3V, IOUT = 750mA
70
140
µs
t2
Rise Time (10% to 90%)
VCC OUT = 0V to 5.0V
50
60
µs
t3
Fall Time (note 3)
VCC OUT = 5.0V to 0V or 3.3V to 0V
40
µs
t4
Rise Time
VCC OUT = Hi-Z to 5V
60
µs
POWER SUPPLY
ICC5
VCC5 IN Supply Current
ICC OUT = 0
ICC3
VCC3 IN Supply Current
VCC OUT = 5V or 3.3V, ICC OUT = 0
VCC OUT = Hi-Z (Sleep Mode)
IPP IN
0.01
10
µA
30
100
µA
0.01
10
15
30
0.01
10
VPP IN Supply Current
VCC Active, VPP OUT = 5V or 3.3V
IPP OUT =0
VPP OUT = HiZ, 0, or VPP
VCC5 IN
Operating Input Voltage
VCC5 IN ≥ VCC3 IN
VCC3 IN
5.0
6
V
VCC3 IN
Operating Input Voltage
VCC3 IN ≤ VCC5 IN
2.8
3.3
VCC5 IN
V
VPP IN
Operating Input Voltage
8.0
12.0
14.5
V
µA
SUSPEND MODE (NOTE 6)
ICC3
Suspend Mode Active Current
(from VCC3)
VPP IN = 0V, VCC5 = VCC3 = 3.3V
VCC5 = Enabled
VPP = Disabled (Hi-Z or 0V)
30
100
µA
RON VCC
VCC OUT RON
VPP IN = 0V, VCC5 = VCC3 = 3.3V
VCC3 = Enabled
VPP = Disabled (Hi-Z or 0V)
4.5
6
Ω
NOTE 1:
NOTE 2:
NOTE 3:
NOTE 6:
MIC2561
Functional operation above the absolute maximum stress ratings is not implied.
Static-sensitive device. Store only in conductive containers. Handling personnel and equipment should be grounded to prevent damage
from static discharge.
From 90% of VOUT to 10% of VOUT. RL = 2.1kΩ
Suspend mode is a pseudo power-down mode the MIC2561 automatically allows when VPP IN = 0V, VPP OUT is deselected, and VCC
OUT = 3.3V is selected. Under these conditions, the MIC2561 functions in a reduced capacity mode where VCC output of 3.3V is allowed,
but at lower current levels (higher switch ON resistance).
4
January 2005
MIC2561
Micrel
MIC2561-0 Control Logic Table
Pin 1
VCC5_EN
Pin 2
VCC3_EN
Pin 4
EN1
Pin 3
EN0
Pins 8 & 12
VCC OUT
Pin 7
VPP OUT
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
High Z
High Z
High Z
High Z
3.3
3.3
3.3
3.3
5
5
5
5
3.3
3.3
3.3
3.3
High Z
High Z
High Z
Clamped to Ground
High Z
3.3
12
Clamped to Ground
High Z
5
12
Clamped to Ground
High Z
3.3
5
Clamped to Ground
MIC2561-1 Logic (Compatible with Cirrus Logic CL-PD6710 & CL-PD6720 Controllers)
Pin 1
VCC5_EN
Pin 2
VCC3_EN
Pin 4
VPP_PGM
Pin 3
VPP_VCC
Pins 8 & 12
VCC OUT
Pin 7
VPP OUT
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
High Z
High Z
High Z
High Z
5
5
5
5
3.3
3.3
3.3
3.3
High Z
High Z
High Z
High Z
Clamped to Ground
High Z
High Z
High Z
Clamped to Ground
5
12
High Z
Clamped to Ground
3.3
12
High Z
Clamped to Ground
High Z
High Z
High Z
Note: other control logic patterns are available. Please contact Micrel for details.
January 2005
5
MIC2561
MIC2561
Micrel
Applications Information
Supply Bypassing
PCMCIA VCC and VPP control is easily accomplished using
the MIC2561 voltage selector/switch IC. Four control bits
determine VCC OUT and VPP OUT voltage and standby/
operate mode condition. VPP OUT output voltages of VCC
(3.3V or 5V), VPP, or a high impedance state are available.
When the VCC high impedance condition is selected, the
device switches into “sleep” mode and draws only nanoamperes of leakage current. An error flag falls low if the output
is improper, because of overtemperature or overcurrent
faults. Full protection from hot switching is provided which
prevents feedback from the VPP OUT to the VCC inputs (from
12V to 5V, for example) by locking out the low voltage switch
until VPP OUT drops below VCC. The VCC output is similarly
protected against 5V to 3.3V shoot through.
External capacitors are not required for operation. The
MIC2561 is a switch and has no stability problems. For best
results however, bypass VCC3 IN, VCC5 IN, and VPP IN
inputs with filter capacitors to improve output ripple. As all
internal device logic and voltage/current comparison functions are powered from the VCC3 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 0.47µF may be necessary.
Both VCC OUT and VPP OUT pins may have 0.01µF to 0.1µF
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 VCC3 IN, VCC5 IN, and VPP IN pins.
PCMCIA Implementation
The MIC2561 is a low-resistance power MOSFET switching
matrix that operates from the computer system main power
supply. Device logic power is obtained from VCC3 and
internal MOSFET drive is obtained from the VPP IN pin
(usually +12V) during normal operation. If +12V is not available, the MIC2561 automatically switches into “suspend”
mode, where VCC OUT can be switched to 3.3V, but at higher
switch resistance. Internal break-before-make switches determine the output voltage and device mode.
The Personal Computer Memory Card International Association (PCMCIA) specification requires two VPP supply pins per
PCMCIA slot. VPP is primarily used for programming Flash
(EEPROM) memory cards. The two VPP supply pins may be
programmed to different voltages. Fully implementing PCMCIA specifications requires a MIC2561, a MIC2557 PCMCIA
VPP Switching Matrix, and a controller. Figure 3 shows this
full configuration, supporting both 5.0V and 3.3V VCC operation.
5V
System
Power 3.3V
Supply
12V
VPPIN VCC3IN VCC5IN
PCMCIA
Card Slot
VPP1
EN0
VPP2
EN1
MIC2561
VCC
PCMCIA
Card Slot
Controller
VCC5_EN
VCC3_EN
VPP IN VDD
EN0
EN1
VCC
VPP OUT
MIC2557
Figure 3. MIC2561 Typical PCMCIA memory card application with dual VCC (5.0V or 3.3V) and separate VPP1 and VPP2.
MIC2561
6
January 2005
MIC2561
Micrel
5V
System
Power 3.3V
Supply
12V
VPPIN VCC3IN VCC5IN
VPP1
EN0
VPP2
EN1
PCMCIA
Card Slot
MIC2561
PCMCIA
Card Slot
Controller
VCC
VCC5_EN
VCC3_EN
Figure 4. MIC2561 Typical PCMCIA memory card application with dual VCC (5.0V or 3.3V). Note that VPP1 and VPP2 are
driven together.
However, many cost sensitive designs (especially notebook/
palmtop computers) connect VPP1 to VPP2 and the MIC2557
is not required. This circuit is shown in Figure 4.
level selected. The lockout delay time varies with the load
current and the capacitor on VPP OUT. With a 0.1µF capacitor
and nominal IPP OUT, the delay is approximately 250µs.
When a memory card is initially inserted, it should receive
V
— either 3.3V ± 0.3V or 5.0V ±5%. The initial voltage is
CC
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 and if the card is designed for dual
PP
V . If the card is compatible with and desires a different V
CC
CC
level, the controller commands this change by disabling V ,
CC
waiting at least 100ms, and then re-enabling the other V
CC
voltage.
Internal drive and bias voltage is derived from VPP IN. Internal
device control logic is powered from VCC3 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 MIC2561.
Output Current and Protection
MIC2561 output switches are capable of more current than
needed in PCMCIA applications and meet or exceed 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 MIC2561,
the system power supplies, the card socket pins, and the
memory card. The MIC2561 overtemperature shutdown occurs at a die temperature of 110°C.
If no card is inserted or the system is in sleep mode, the
controller outputs a (VCC3 IN, VCC5 IN) = (0,0) to the
MIC2561, which shuts down VCC. 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.
Suspend Mode
During Flash memory programming with standard (+12V)
Flash memories, the PCMCIA controller outputs a (1,0) to the
EN0, EN1 control pins of the MIC2561, which connects
VPP IN to VPP OUT. The low ON resistance of the MIC2561
switches allow using small bypass capacitors (in some cases,
none at all) on the VCC OUT and VPP OUT pins, with the main
filtering action performed by a large filter capacitor on the
input supply voltage to VPP IN (usually the main power
supply filter capacitor is sufficient). The VPP OUT transition
from VCC to 12.0V typically takes 15µs. After programming is
completed, the controller outputs a (EN1, EN0) = (0,1) to the
MIC2561, which then reduces VPP OUT to the VCC level for
read verification. Break-before-make switching action reduces switching transients and lowers maximum current
spikes through the switch from the output capacitor. The flag
comparator prevents having high voltage on the VPP OUT
capacitor from contaminating the VCC inputs, by disabling the
low voltage VPP switches until VPP OUT drops below the VCC
January 2005
An additional feature in the MIC2561 is a pseudo power-down
mode, Suspend Mode, which allows operation without a VPP
IN supply. In Suspend Mode, the MIC2561 supplies 3.3V to
VCC OUT whenever a VCC output of 3.3V is enabled by the
PCMCIA controller. This mode allows the system designer
the ability to turn OFF the VPP supply generator to save
power when it is not specifically required. The PCMCIA card
receives VCC at reduced capacity during Suspend Mode, as
the switch resistance rises to approximately 4.5Ω.
High Current VCC Operation Without a
+12V Supply
Figure 5 shows the MIC2561 with V
switch bias provided
CC
by a simple charge pump. This enables the system designer
to achieve full V
performance without a +12V supply,
CC
which is often helpful in battery powered systems that only
provide +12V when it is needed. These on-demand +12V
7
MIC2561
MIC2561
Micrel
Switched VPP IN
0.1µF
1N914
(Optional Schottky)
Drive Enable
4.7kΩ
0.02µF
0.01µF
1N914
+5V
14
2
13
3
12
4
11
5
10
6
9
7
8
Figure 5. Circuit for generating bias drive for the VCC switches when +12V is not readily available.
supplies generally have a quiescent current draw of a few
milliamperes, which is far more than the microamperes used
by the MIC2561. The charge pump of Figure 5 provides this
low current, using about 100µA when enabled. When V
PP OUT
= 12V is selected, however, the on-demand V
generator
PP
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.
MIC2561
8
January 2005
MIC2561
Micrel
Package Information
PIN 1
DIMENSIONS:
INCHES (MM)
0.154 (3.90)
0.026 (0.65)
MAX)
0.193 (4.90)
0.050 (1.27) 0.016 (0.40)
TYP
TYP
45°
0.006 (0.15)
0.057 (1.45)
0.049 (1.25)
0.344 (8.75)
0.337 (8.55)
SEATING
PLANE
3°–6°
0.244 (6.20)
0.228 (5.80)
14-Pin SOP (M)
January 2005
9
MIC2561
MIC2561
MIC2561
Micrel
10
January 2005
MIC2561
January 2005
Micrel
11
MIC2561
MIC2561
Micrel
MICREL INC.
TEL
1849 FORTUNE DRIVE
+ 1 (408) 944-0800
FAX
SAN JOSE, CA 95131 USA
+ 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.
© 2005 Micrel Incorporated
MIC2561
12
January 2005
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