Datasheet MIC2560-1BWM, MIC2560-0BWM Datasheet (MICREL)

MIC2560 Micrel

MIC2560

PCMCIA Card Socket VCC and VPP Switching Matrix

General Description

The MIC2560 VCC and VPP Matrix controls PCMCIA (Per­sonal Computer Memory Card International Association)
memory card power supply pins, both VCC and VPP. The
MIC2560 switches voltages from the system power supply to
VCC and VPP. The MIC2560 switches between the three V

CC

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 1A for V

and 200mA for VPP.

CC

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 0.01µA. The device and PCMCIA ports are pro­tected by current limiting and overtemperature shutdown.
Full cross-conduction lockout protects the system power
supply.

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.

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 VCC and VPP 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 VCC and VPP voltages

• Over 1A VCC output current

• 200mA VPP (12V) output current

• Options for direct compatibility with
industry standard PCMCIA controllers

• 16-Pin SO package

Typical Application

System Power Supply

12V 3.3V 5V

Address and data lines

between logic controller and

PCMCIA cards not shown.

VPP IN

PCMCIA

Card Slot

Controller

Micrel, Inc. • 1849 Fortune Drive • San Jose, CA 95131 • USA • tel + 1 [phone] • fax + 1 [phone] • http://www.micrel.com

EN0
EN1
V

CC5

V

CC3

EN
EN

V

CC3

MIC2560

Power

Controller

GND

November 1999 1 MIC2560

IN

V

IN

CC5

VPP OUT
V

OUT

CC

V
V

Motherboard

1

PP

2

PP

V

CC

PCMCIA

Card

MIC2560 Micrel

Pin Configuration

Logic Block Diagram

1V

IN

CC3

IN

GND

EN

EN
EN0
EN1

2
3
4
5
6
7
8

OUT

V

CC

V

CC3

V

CC5

V

CC3

16 V
15
14
13
12
11
10

9

OUT

CC

IN

V

CC5

VCC OUT

OUT

V

PP

IN

V

PP

NC
NC
FLAG

Both V

All three V

IN pins must be connected.

CC3

OUT pins must be connected.

CC

V

IN

PP

0.5Ω

V

CC5_EN

V

CC3_EN

V

CC3

EN1

EN0

IN

Control

Logic

V

PP OUT

0.7Ω

V

CC OUT

0.07Ω

2Ω

V

CC5

IN

Flag

I

/ Thermal Shut Down

Limit

0.04Ω

GND

MIC2560 2 November 1999

MIC2560 Micrel

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

V

IN ....................................................... V

CC3

V

IN ............................................................. 7.5V

CC5

...................................................

PP IN

Logic Input Voltages..................................–0.3V to +15V

Output Current (each Output)

V

PP OUT

V

CC OUT

V

CC OUT

............................

...................................

, Suspend Mode.............................. 600mA

>200mA, Internally Limited

>1A, Internally Limited

CC5

15V

IN

Electrical Characteristics:

(Over operating temperature range with V

Symbol Parameter Conditions Min Typ Max Units
Input

V

IH

V

IL

I

IN

Logic 1 Input Voltage 2.2 15 V
Logic 0 Input Voltage –0.3 0.8 V
Input Current 0 V < VIN < 5.5V ±1 µA

VPP Output

I

PP OUT

High-Impedance Output Shutdown Mode 1 10 µA

Hi-Z Leakage Current 1V ≤ V
I

PPSC

R

O

R

O

Short Circuit Current Limit V
Switch Resistance, select V

I

= –100mA (sourcing)

PP OUT

Switch Resistance, select V
I

= 50µA

PP OUT

VPP Switching Time

t

1

t

2

t

3

t

4

Output Turn-On Rise Time V
Output Turn-On Rise Time V
Output Turn-On Rise Time V
Output Rise Time V

VCC Output

I

CC OUT

High Impedance Output 1V ≤ V

Hi-Z Leakage Current, Note 3
I

CCSC

R

O

R

O

Short Circuit Current Limit V
Switch Resistance, I

V

CC OUT

= 5.0V

Switch Resistance, I
V

CC OUT

= 3.3V

VCC Switching Time

t

1

t

2

t

3

t

4

Rise Time V
Rise Time V
Fall Time V
Rise Time V

IN = 3.3V, V

CC3

IN = 5.0V, VPP IN = 12V unless otherwise specified.)

CC5

OUT ≤ 12V

PP

= 0 0.2 A

PP OUT

OUT = 12V 0.55 1 Ω

PP

select V
select V

PP
PP
PP
PP

CC OUT

CC OUT

CC OUT

CC OUT
CC OUT
CC OUT
CC OUT

OUT = 5V 0.7 1 Ω

PP

OUT = 3.3V 2 3 Ω

PP

= clamped to ground 0.75 2 kΩ

PP OUT

OUT = hi-Z to 5V 50 µs
OUT = hi-Z to 3.3V 40 µs
OUT = hi-Z to 12V 300 µs
OUT = 3.3V or 5V to 12V 300 µs

≤ 5V 1 10 µA

CC OUT

= 0 1 2 A

= –1000mA (sourcing) 70 100 mΩ

= –1000mA (sourcing) 40 66 mΩ

= 0V to 3.3V, I
= 0V to 5.0V, I

= 1A 100 600 µs

OUT

= 1A 100 500 µs

OUT

= 5.0V to 3.3V 300 µs
= hi-Z to 5V 400 µs

November 1999 3 MIC2560

MIC2560 Micrel

Symbol Parameter Conditions Min Typ Max Units
Power Supply

I

CC5

I

CC3

I

IN V

PP

V

IN Operating Input Voltage V

CC5

V

IN Operating Input Voltage V

CC3

V

PP IN

Suspend Mode (Note 4)

I

CC3

R

ON VCC

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

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

V

IN Supply Current I

CC5

V

IN Supply Current V

CC3

IN Supply Current VCC active, V

PP

(I

PP OUT

= 0)

= 0 0.01 10 µA

CC OUT

CC OUT

V

CC OUT

V

PP OUT
CC5
CC3

= 5V or 3.3V, I
= hi-Z (Sleep mode) 0.01 10 µA

= 5V or 3.3V 15 50 µA

PP OUT

= hi-Z, 0 or V

IN ≥ V

CC3

IN ≤ V

CC5

PP

IN V
IN 2.8 3.3 V

= 0 30 50 µA

CC OUT

0.01 10 µA

IN 5.0 6 V

CC3

CC5

IN V

Operating Input Voltage 8.0 12.0 14.5 V

Active Mode Current V

V

CC OUT RON

= 0V, V

PP IN

= enabled

V

CC3

VPP = disabled (hi-Z or 0V)
V

= 0V, V

PP IN

V

= enabled

CC3

CC5

CC5

= V

= V

CC3

CC3

= 3.3V 30 µA

= 3.3V 4.5 Ω

VPP = disabled (hi-Z or 0V)

static discharge.

= 0V, VPP OUT is deselected, and VCC OUT =

3.3V is selected. Under these conditions, the MIC2560 functions in a reduced capacity mode where VCC output of 3.3V is allowed, but at
lower current levels (higher switch on-resistance).

PP IN

MIC2560 4 November 1999

MIC2560 Micrel

MIC2560-0 Control Logic Table

Pin 5 Pin 6 Pin 8 Pin 7 Pins 2 & 14 Pin 13

V

CC5_EN

0000 High Z High Z
0001 High Z High Z
0010 High Z High Z
0011 High Z Clamped to Ground
0100 3.3 High Z
0101 3.3 3.3
0110 3.3 12
0111 3.3Clamped to Ground
1000 5 High Z
1001 5 5
1010 5 12
1011 5Clamped to Ground
1100 3.3 High Z
1101 3.3 3.3
1110 3.3 5
1111 3.3Clamped to Ground

V

CC3_EN

EN1 EN0 V

CC OUT

V

PP OUT

MIC2560-1 Logic (Compatible with Cirrus Logic CL-PD6710 & CL-PD6720 Controllers)

Pin 5 Pin 6 Pin 8 Pin 7 Pins 2 & 14 Pin 13

V

CC5_EN

0000 High Z Clamped to Ground
0001 High Z High Z
0010 High Z High Z
0011 High Z High Z
0100 5Clamped to Ground
0101 5 5
0110 5 12
0111 5 High Z
1000 3.3Clamped to Ground
1001 3.3 3.3
1010 3.3 12
1011 3.3 High Z
1100 High Z Clamped to Ground
1101 High Z High Z
1110 High Z High Z
1111 High Z High Z

V

CC3_EN

V

PP_PGM

V

PP_VCC

V

CC OUT

V

PP OUT

November 1999 5 MIC2560

MIC2560 Micrel

Applications Information

PCMCIA VCC and VPP control is easily accomplished using
the MIC2560 voltage selector/switch IC. Four control bits
determine V

CC OUT

operate mode condition. V

and V

PP OUT

PP OUT

voltage and standby/

output voltages of V

CC

(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 V

to the VCC inputs

PP OUT

(from 12V to 5V, for example) by locking out the low voltage
switch until V

drops below VCC. The VCC output is

PP OUT

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 VPP 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
with filter capacitors to improve output ripple. As all internal
device logic and voltage/current comparison functions are
powered from the V

CC3

the most critical, and may be necessary in some cases. In the
most stubborn layouts, up to 0.47µF may be necessary. Both
V

CC OUT

and V

PP OUT

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

IN inputs

PP

IN line, supply bypass of this line is

pins may have 0.01µF to 0.1µF

CC3

IN, V

CC5

IN, and V

IN pins.

PP

PCMCIA Implementation

The MIC2560 is designed for compatibility with the Personal
Computer Memory Card International Association’s (PCM­CIA) Specification, revision 2.1 as well as the PC Card
Specification, (March 1995), including the CardBus option.

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 MIC2560, 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

3.3V

Power

Supply

12V

PCMCIA

Card Slot

Controller

V

EN0

EN1

PP IN

V

DD

V

PP

MIC2557

VPPIN V

EN0

EN1

V

V

V

CC

OUT

MIC2560

CC5_EN

CC3_EN

CC3

INV

IN

CC5

Figure 3. MIC2560 Typical PCMCIA memory card

application with dual VCC (5.0V or 3.3V) and separate

V

and V

PP1

PP2.

PCMCIA

Card Slot

V

PP1

V

PP2

V

CC

MIC2560 6 November 1999

MIC2560 Micrel

5V

System

Power

Supply

PCMCIA

Card Slot

Controller

3.3V

12V

V

VPPIN V

CC3

EN0

EN1

MIC2560

V

CC5_EN

V

CC3_EN

IN

IN

CC5

V

V

V

PP1

PP2

CC

PCMCIA

Card Slot

Figure 4. MIC2560 Typical PCMCIA memory card application with dual VCC (5.0V or 3.3V). Note that V
driven together.

However, many cost sensitive designs (especially notebook/
palmtop computers) connect V

PP1

to V

and the MIC2557

PP2

is not required. This circuit is shown in Figure 4.
When a memory card is initially inserted, it should receive

VCC — 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 VPP and if the card is designed for dual
VCC. If the card is compatible with and desires a different V
level, the controller commands this change by disabling VCC,
waiting at least 100ms, and then re-enabling the other V
voltage.

level selected. The lockout delay time varies with the load
current and the capacitor on V
and nominal I

, the delay is approximately 250µs.

PP OUT

. With a 0.1µF capacitor

PP OUT

Internal drive and bias voltage is derived from V
device control logic is powered from V

CC3

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

CC

MIC2560 output switches are capable of more current than
needed in PC Card applications (1A) and meet or exceed all

CC

PCMCIA specifications. For system and card protection,
output currents are internally limited. For full system protec-

If no card is inserted or the system is in sleep mode, the
controller outputs a (V

CC3

IN, V

IN) = (0,0) to the MIC2560,

CC5

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

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.

leakage currents flowing.

Single VCC Operation

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
VPPIN to V

. The low ON resistance of the MIC2560

PP OUT

switches allow using small bypass capacitors (in some cases,
none at all) on the V

CC OUT

and V

pins, with the main

PP OUT

filtering action performed by a large filter capacitor on the
input supply voltage to VPPIN (usually the main power supply
filter capacitor is sufficient). The V

transition from V

PP OUT

to 12.0V typically takes 250µs. After programming is com­pleted, the controller outputs a (EN1, EN0) = (0,1) to the
MIC2560, which then reduces V

to the VCC level for

PP OUT

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

drops below the V

OUT

For PC Card slots requiring only a single VCC, connect
V

CC3 IN

and V

together and to the system VCC supply

CC5 IN

(i.e., Pins 1, 3, and 15 are all connected to system VCC).
Either the V

switch or the V

CC5

switch may be used to

CC3

enable the card slot VCC; generally the V
preferred because of its lower ON resistance.

Suspend Mode

An additional feature in the MIC2560 is a pseudo power-down

CC

mode, Suspend Mode, which allows operation without a V
IN supply. In Suspend Mode, the MIC2560 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.

CC

and V

PP1

IN. Internal

PP

PP2

are

IN. Input logic

switch is

CC3

PP

November 1999 7 MIC2560

MIC2560 Micrel

Drive Enable

+5V

4.7kΩ

0.01µF

2
3

MIC2560

4
5
6
7

89

1N914

16
15
14
13
12

11
10

Switched V

1N9140.1µF

0.02µF

PP IN

(Optional Schottky)

Figure 5. Circuit for generating bias drive for the VCC switches when +12V is not readily available.

High Current VCC Operation Without a
+12V Supply

Figure 5 shows the MIC2560 with VCC switch bias provided
by a simple charge pump. This enables the system designer
to achieve full VCC 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 100µA when enabled. When V

PP OUT

=
12V is selected, however, the on-demand VPP 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 8 November 1999

MIC2560 Micrel

Package Information

PIN 1

DIMENSIONS:

0.301 (7.645)

0.297 (7.544)

INCHES (MM)

0.027 (0.686)

0.031 (0.787)

0.094 (2.388)

0.090 (2.286)

0.050 (1.270)
TYP

0.409 (10.389)

0.405 (10.287)

0.016 (0.046)
TYP

0.103 (2.616)

0.099 (2.515)

SEATING

PLANE

0.015

(0.381)

0.015

(0.381)

MIN

16-Pin Wide SOP (M)

TYP
R

7°

0.297 (7.544)

0.293 (7.442)

0.330 (8.382)

0.326 (8.280)

0.032 (0.813) TYP

0.408 (10.363)

0.404 (10.262)

0.022 (0.559)

0.018 (0.457)

10° TYP

5°
TYP

November 1999 9 MIC2560

MIC2560 Micrel

MIC2560 10 November 1999

MIC2560 Micrel

November 1999 11 MIC2560

MIC2560 Micrel

MICREL INC. 1849 FORTUNE DRIVE SAN JOSE, CA 95131 USA

TEL + 1 [phone] FAX + 1 [phone] 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

MIC2560 12 November 1999