MIC2560-0YWM - Micrel Semiconductor, Inc.

MIC2560

PCMCIA Card Socket V

and V

Switching Matrix

Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel +1 (408) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com

September 2006 1 M9999-092106

General Description

The MIC2560 V

and V

Matrix controls PCMCIA (Per-

sonal Computer Memory Card International Association)

memory card power supply pins, both V

and V

. The

MIC2560 switches voltages from the system power supply

to V

and V

. The MIC2560 switches between the three

voltages (OFF, 3.3V and 5.0V) and the V

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 V

The MIC2560 provides power management capability

under the control of the PC Card controller and features

over current 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 stand-

by (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.

Data sheets and support documentation can be found on

Micrel’s web site at www.micrel.com.

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

• Ultra-low 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 SOIC package

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/data-logging

• Docking stations (portable and desktop)

• Power supply management

• Power analog switching

Typical Application

Micrel, Inc. MIC2560

September 2006 2 M9999-092106

Ordering Information

Part Number

Standard Pb-Free

Temperature Range Package

MIC2560-0BWM MIC2560-0YWM –40°C to +85°C 16-Pin Wide SOIC

MIC2560-1BWM MIC2560-1YWM –40°C to +85°C 16-Pin Wide SOIC

Pin Configur ation

Both V

CC3

IN pins must be connected.

All three V

OUT pins must be connected.

16-Pin Wide SOIC (WM)

Logic Block Diagram

Micrel, Inc. MIC2560

September 2006 3 M9999-092106

MIC2560-0 Control Logic Ta ble

Pin 5

CC5_EN

Pin 6

CC3_EN

Pin 8

EN1 Pin 7

EN0 Pins 2 & 14

CC OUT

Pin 13

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

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

Pin 5

CC5_EN

Pin 6

CC3_EN

Pin 8

EN1 Pin 7

EN0 Pins 2 & 14

CC OUT

Pin 13

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

Micrel, Inc. MIC2560

September 2006 4 M9999-092106

Absolute Maximum Ratings(1, 2)

Power Dissipation, T

AMBIENT

≤ 25°C...........Internally Limited

SOIC. .................................................................800mW

Derating Factors (To Ambient)

SOIC .................................................................4mW/°C

Storage Temperature (T

) .........................–65°C to +150°C

Maximum Operating Temperature (Die) .................... 125°C

Operating Temperature (Ambient) ..............–40°C to +70°C

Lead Temperature (soldering, 5sec.)......................... 260°C

Supply Voltage (V

PP IN

) ...................................................15V

CC3

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

CC5

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

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

Output Current (each Output)

PP OUT

................................. >200mA, Internally Limited

PP OUT

........................................ >1A, Internally Limited

PP OUT

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

Electrical Characteristics(3)

(Over operating temperature range with V

CC3

= 3.3V, V

CC5

= 5.0V, V

= 12V unless otherwise specified.)

Symbol Parameter Condition Min Typ Max Units

Input

Logic 1 Input Voltage 2.2 15 V

Logic 0 Input Voltage –0.3 0.8 V

Input Current 0V < V

< 5.5V ±1 µA

VPP Output

PP OUT

Hi-Z

High-Impedance Output

Leakage Current

Shutdown Mode

1V ≤ V

PP OUT

≤ 12V

1 10 µA

PPSC

Short Circuit Current Limit V

PP OUT

= 0 0.2 A

select V

PP OUT

= 12V 0.55 1 Ω

select V

PP OUT

= 5V 0.7 1 Ω

Switch Resistance,

PP OUT

= –100mA (sourcing)

select V

PP OUT

= 3.3V 2 3 Ω

Switch Resistance,

PP OUT

= 50µA

select V

PP OUT

= clamped to ground 0.75 2 kΩ

Switching Time

Output Turn-On Rise Time V

PP OUT

= hi-Z to 5V 50 µs

Output Turn-On Rise Time V

PP OUT

= hi-Z to 3.3V 40 µs

Output Turn-On Rise Time V

PP OUT

= hi-Z to 12V 300 µs

Output Rise Time V

PP OUT

= 3.3V or 5V to 12V 300 µs

VCC Output

CC OUT

Hi-Z

High Impedance Output

Leakage Current, Note 3

1V ≤ V

CC OUT

≤ 5V 1 10 µA

CCSC

Short Circuit Current Limit V

CC OUT

= 0 1 2 A

Switch Resistance,

CC OUT

= 5.0V

CC OUT

= –1000mA (sourcing) 70 100 mΩ R

Switch Resistance,

CC OUT

= 3.3V

CC OUT

= –1000mA (sourcing) 40 66 mΩ

Switching Time

Rise Time V

CC OUT

= 0V to 3.3V, IOUT = 1A 100 600 µs

Rise Time V

CC OUT

= 0V to 5.0V, IOUT = 1A 100 500 µs

Fall Time V

CC OUT

= 5.0V to 3.3V 300 µs

Rise Time V

CC OUT

= hi-Z to 5V 400 µs

Micrel, Inc. MIC2560

September 2006 5 M9999-092106

Symbol Parameter Condition Min Typ Max Units

Power Supply

CC5

CC5 IN

Supply Current I

CC OUT

= 0 0.01 10 µA

CC OUT

= 5V or 3.3V, I

CC OUT

= 0 30 50 µA I

CC3

CC3 IN

Supply Current

CC OUT

= hi-Z (Sleep mode) 0.01 10 µA

active, V

PP OUT

= 5V or 3.3V 15 50 µA I

PP IN

Supply Current

PP OUT

= 0) V

PP OUT

= hi-Z, 0 or V

0.01 10 µA

CC5 IN

Operating Input Voltage V

CC5

IN ≥ V

CC3

IN V

CC3 IN

5.0 6 V

CC3 IN

Operating Input Voltage V

CC3 IN

≤ V

CC5 IN

2.8 3.3 V

CC3 IN

PP IN

Operating Input Voltage 8.0 12.0 14.5 V

Suspend Mode (Note 4)

CC3

Active Mode Current V

PP IN

= 0V, V

CC3

= V

CC3

= 3.3V

CC3

= enabled

= disabled (hi-Z or 0V)

30 µA

CC OUT

PP IN

= 0V, V

CC5

= V

CC3

= 3.3V

CC3

= enabled

= disabled (hi-Z or 0V)

4.5 Ω

Notes:

1. Functional operation above the absolute maximum stress ratings is not implied.

2. Static-sensitive device. Store only in conductive containers. Handling personnel and equipment should be grounded to prevent damage from static

discharge.

3. Leakage current after 1,000 hours at 125°C may increase up to five times the initial limit.

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

output of 3.3V is allowed, but at lower current levels

(higher switch on-resistance).

Micrel, Inc. MIC2560

September 2006 6 M9999-092106

Application Information

PCMCIA V

and V

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

(3.3V or 5V), V

, or a high impedance state are

available. When the V

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 overcurrent faults. Full protection

from hot switching is provided which prevents feedback

from the V

PP OUT

to the V

inputs (from 12V to 5V, for

example) by locking out the low voltage switch until

PP OUT

drops below V

. The V

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

CC3

and internal MOSFET drive is obtained from the

PP IN

pin (usually +12V) during normal operation. If

+12V is not available, the MIC2560 automatically

switches into “suspend” 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 0.47µF may be necessary. Both V

CC OUT

and

PP 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 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 (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 V

supply pins per PCMCIA slot. V

is primarily used for

programming Flash (EEPROM) memory cards. The two

supply pins may be programmed to different

voltages. Fully implementing PCMCIA specifications

requires a MIC2560, a MIC2557 PCMCIA V

Switching

Matrix, and a controller. Figure 3 shows this full config-

uration, supporting both 5.0V and 3.3V V

operation.

Figure 3. MIC2560 Typical PCMCI A Memory Card

Application with Dual V

(5.0V or 3.3V)

and separate V

PP1

and V

PP2

Figure 4. MIC2560 Typical PCMCI A Memory Card

Application with Dual V

(5.0V or 3.3V).

Note that V

PP1

and V

PP2

are Driven Together.

However, many cost sensitive designs (especially

notebook/palmtop computers) connect V

PP1

to V

PP2

and

the MIC2557is not required. This circuit is shown in

Figure 4.

When a memory card is initially inserted, it should

receive V

— 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

and if the card is designed for dual V

. If the card is

Micrel, Inc. MIC2560

September 2006 7 M9999-092106

compatible with and desires a different V

level, the

controller commands this change by disabling V

waiting at least 100ms, and then re-enabling the other

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

. 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

PP IN

(usually the main power supply filter capacitor is

sufficient). The V

PP OUT

transition from V

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

PP OUT

to the V

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 V

PP OUT

capacitor from contaminating the

inputs, by disabling the low voltage V

switches

until V

PP OUT

drops below the V

level selected. The

lockout delay time varies with the load current and the

capacitor on V

PP OUT

. With a 0.1µF capacitor and nominal

PP OUT

, the delay is approximately 250µs.

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 protection, 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. Overtemp-

erature shutdown typically occurs at a die temperature of

115°C.

Single V

Operation

For PC Card slots requiring only a single V

, connect

CC3 IN

and V

CC5 IN

together and to the system V

supply

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

Either the V

CC5

switch or the V

CC3

switch may be used to

enable the card slot V

; 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

output of 3.3V

is enabled by the PCMCIA controller. This mode allows

the system designer the ability to turn OFF the V

supply generator to save power when it is not specifically

required. The PCMCIA card receives V

at reduced

capacity during Suspend Mode, as the switch resistance

rises to approximately 4.5Ω.

Figure 5. Circuit for Generating Bias Drive for the V

Switches wh en +12V is No t Readily Available.

High Current V

Operation Without a +12V Supply

Figure 5 shows the MIC2560 with V

switch bias

provided by a simple charge pump. This enables the

system designer to achieve full V

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 milli-amperes, 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 V

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.

Micrel, Inc. MIC2560

September 2006 8 M9999-092106

Package Information

16-Pin Wide SOIC (WM)

MICREL, INC. 2180 FORTUNE DRIVE SAN JOSE, CA 95131 USA

TEL +1 (408) 944-0800 FAX +1 (408) 474-1000 WEB http:/www.micrel.com

The information furnished by Micrel in this data sheet is believed to be accurate and reliable. However, no responsibility is assumed by Micrel for its

use. Micrel reserves the right to change circuitry and specifications at any time without notification to the customer.

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