MIC2562A-0YM - MICROCHIP TECHNOLOGY

June 2004 1 M9999-062204

MIC2562A Micrel

MIC2562A

PCMCIA/CardBus Socket Power Controller

General Description

The MIC2562A PCMCIA (Personal Computer Memory Card

International Association) and CardBus power controller

handles all PC Card slot power supply pins, both VCC and

VPP. The MIC2562A switches between the three VCC volt-

ages (0V, 3.3V and 5.0V) and the VPP voltages (OFF, 0V,

3.3V, 5V or 12.0V) required by PC Cards. The MIC2562A

switches voltages from the system power supply to VCC and

VPP. Output voltage is selected by two digital inputs each and

output current ranges up to 1A for VCC and 250mA for VPP.

The MIC2562A provides power management capability con-

trolled by the PC Card logic controller. Voltage rise and fall

times are well controlled. Medium current VPP and high

current VCC output switches are self-biasing:

no +12V sup-

ply 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 0.3µA. The device and PCMCIA port is protected by

current limiting and overtemperature shutdown. Full cross-

conduction lockout protects the system power supply during

switching operations.

The MIC2562A is an improved version of the MIC2562,

offering lower on-resistance and a VCC pull-down clamp in

the OFF mode. It is available in a 14-pin (0.150") SOIC, and

the -1 logic option is also available in 16-pin TSSOP

All support documentation can be found on Micrel’s web

site at www.micrel.com.

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 VCC and VPP 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 VCC and VPP voltages

• Over 1A VCC output current

• Over 200mA VPP output current

• Pb-free SOIC packages

• UL recognized, file #179633

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

Micrel, Inc. • 1849 Fortune Drive • San Jose, CA 95131 • USA • tel + 1 (408) 944-0800 • fax + 1 (408) 944-0970 • http://www.micrel.com

Typical Application

System

Power

Supply

PCMCIA

Card Slot

Controller

MIC2562

PCMCIA

Card Slot

3.3V

12V

(opt)

EN0

EN1

VPP1

VCC

VPP IN

(opt) VCC5 IN

VCC3 IN

VCC5_EN

VCC3_EN

VPP2

UL Recognized Component

MIC2562A Micrel

June 2004 2 M9999-062204

Pin Configuration

14-Pin SOIC (M)

1VCC5_EN

VCC3_EN

/FLAG

VPP IN

VPP OUT

14 GND

VCC5 IN

VCC OUT

VCC5 IN

VCC OUT

VCC3 IN

VCC OUT

* See table below

Both VCC5 IN pins must be connected.

All three VCC OUT pins must be connected.

* See table below

1VCC5_EN

VCC3_EN

/FLAG

VPP IN

VPP OUT

16 GND

VCC5 IN

VCC OUT

VCC5 IN

VCC OUT

VCC3 IN

VCC OUT

16-Pin TSSOP (TS)

Both VCC5 IN pins must be connected.

All three VCC OUT pins must be connected.

Ordering Information(1)

Part Number Temperature Range Package Pb-Free

MIC2562A-0BM –40°C to +85°C 14-pin Narrow SOIC

MIC2562A-1BM –40°C to +85°C 14-pin Narrow SOIC

MIC2562A-0YM –40°C to +85°C 14-pin Narrow SOIC X

MIC2562A-1YM –40°C to +85°C 14-pin Narrow SOIC X

MIC2562A-1BTS –40°C to +85°C 16-pin TSSOP

MIC2562A-1YTS –40°C to +85°C 16-pin TSSOP X

MIC2562A Pin Assignments

Pin -0 -1

3 EN0 VPP_VCC

4 EN1 VPP_PGM

MIC2562A Pin Assignments

Pin -0 -1

3 EN0 VPP_VCC

4 EN1 VPP_PGM

Note.

1. See “MIC2562A-0 Control Logic” table for a description of the differences between the

logic options.

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MIC2562A Micrel

Electrical Characteristics(3)

Over operating temperature range with VCC3 IN = 3.3V, VCC5 IN = 5.0V, V PP IN = 12V; TA = 25°C, bold values indicate –40°C ≤ TA ≤ +85°C; unless noted.

Symbol Parameter Condition Min Typ Max Units

Digital Inputs

VIH Logic 1 Input Voltage 2.2 7.5 V

VIL Logic 0 Input Voltage –0.3 0.8 V

IIN Input Current 0V < VIN < 5.5V ±1µA

VPP Output

IPP OUT High Impedance Output Shutdown Mode 1 10 µA

Hi-Z Leakage Current 0 ≤ VPP OUT ≤ 12V

IPPSC Short Circuit Current Limit VPP OUT = 0 0.2 0.4 A

ROSwitch Resistance Select VPP OUT = 5V 1.8 2.5 Ω

Select VPP OUT = 3.3V 3.3 5 Ω

IPP OUT = –100mA (Sourcing)

ROSwitch Resistance, VPP IN = 12V 0.6 1 Ω

Select VPP OUT = 12V IPP OUT = –100mA (Sourcing)

ROSwitch Resistance, Select VPP OUT = clamped to ground 2500 3900 Ω

Select VPP OUT = 0V IPP OUT = 50µA (Sinking)

VPP Switching Time (See Figure 1)

t1Output Turn-On Delay(4) VPP OUT = Hi-Z to 10% of 3.3V 5 50 µs

t2VPP OUT = Hi-Z to 10% of 5V 10 50 µs

t3VPP OUT = Hi-Z to 10% of 12V 70 250 µs

t4Output Rise Time(4) VPP OUT = 10% to 90% of 3.3V 100 200 800 µs

t5VPP OUT = 10% to 90% of 5V 100 300 1000 µs

t6VPP OUT = 10% to 90% of 12V 100 225 800 µs

t7Output Transition Timing(4) VPP OUT = 3.3V to 90% of 12V 100 250 1000 µs

t8VPP OUT = 5V to 90% of 12V 100 200 800 µs

t9VPP OUT = 12V to 90% of 3.3V 100 200 800 µs

t10 VPP OUT = 12V to 90% of 5V 100 350 1200 µs

t14 Output Turn-Off Delay Time(4) VPP OUT = 3.3V to Hi-Z 200 1000 ns

t15 VPP OUT = 5V to Hi-Z 200 1000 ns

t16 VPP OUT = 12V to Hi-Z 200 1000 ns

Notes:

1. Exceeding the absolute maximum rating may damage the device.

2. The device is not guaranteed to function outside its operating rating. Devices are ESD sensitive. Handling precautions recommended.

3. Specification for packaged product only.

4. RL = 100Ω connected to ground.

Operating Ratings(2)

Ambient Temperature (TA)......................... –40°C to +85°C

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

Package Thermal Resistance (θJA)

SOIC .................................................................120°C/W

TSSOP ....................................... (4 layer board) 83°C/W

Absolute Maximum Ratings(1)

Supply Voltage, VPP IN ...............................................+15V

VCC3 IN...................................................................+7.5V

VCC5 IN...................................................................+7.5V

FLAG Pull-up Voltage ................................................+7.5V

Logic Input Voltages..................................... –0.3V to +10V

Output Current (each output)

VPP OUT............................... >200mA, Internally Limited

VCC OUT ..................................... >1A, Internally Limited

Power Dissipation (PD), TA ≤ 25°C .......... Internally Limited

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

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

Storage Temperature (TS) .......................–65°C to +150°C

MIC2562A Micrel

June 2004 4 M9999-062204

Symbol Parameter Condition Min Typ Max Units

VPP Switching Time (See Figure 1) Continued

t11 Output Turn-Off Fall Time(4) VPP OUT = 90% to 10% of 3.3V 50 1000 ns

t12 VPP OUT = 90% to 10% of 5V 50 1000 ns

t13 VPP OUT = 90% to 10% of 12V 300 2000 ns

VCC Output

ICCSC Short Circuit Current Limit VCC OUT = 0 1 1.5 A

ROSwitch Resistance Select VCC OUT = 3.3V 100 150 mΩ

ICC OUT = –1A (Sourcing)

Select VCC OUT = 5V 70 100 mΩ

ICC OUT = –1A (Sourcing)

Select VCC OUT = clamped to ground 500 3900 Ω

ICC OUT = 0.1mA (Sinking)

VCC Switching Time (See Figure 2)

t1Output Turn-On Delay Time(5) VCC OUT = 0V to 10% of 3.3V 300 1500 µs

t2VCC OUT = 0V to 10% of 5.0V 750 3000 µs

t3Output Rise Time(5) VCC OUT = 10% to 90% of 3.3V 200 700 2500 µs

t4VCC OUT = 10% to 90% of 5V 200 1500 6000 µs

t7Output Turn-Off Delay(5, 6) VCC OUT = 3.3V 2.4 8 ms

t8VCC OUT = 5V 2.8 8 ms

t5Output Fall Time(5) VCC OUT = 90% to 10% of 3.3V 100 240 1000 µs

t6VCC OUT = 90% to 10% of 5.0V 100 600 2000 µs

Power Supply

ICC5 VCC5 IN Supply Current (5V) VCC OUT = 5V or 3.3V, ICC OUT = 0 8 50 µA

VCC OUT = 0V (Sleep Mode) 0.2 10 µA

ICC3 VCC3 IN Supply Current (3.3V)(7) VCC OUT = 5V or 3.3V, ICC OUT = 0 40 100 µA

VCC OUT = 0V (Sleep Mode) 0.1 10 µA

IPP IN VPP IN Supply Current (12V)(8) VPP OUT = 3.3V or 5V. IPP OUT = 0 0.3 4 µA

VPP OUT = Hi-Z, 0 or VPP 0.3 4 µA

VCC5 Operating Input Voltage (5V) VCC5 IN not required for operation 5.0 6 V

VCC3 Operating Input Voltage (3.3V) Note 7 3.0 3.3 6 V

VPP IN Operating Input Voltage (12V) VPP IN not required for operation(9) 12.0 14.5 V

Thermal Shutdown

TSD Thermal Shutdown Temperature 130 °C

FLAG Output

VO OK FLAG Threshold Voltage(10) FLAG High (OK) Threshold Voltage VCC –1 V

VPP –1

Notes:

4. RL = 100Ω connected to ground.

5. RL = 10Ω connected to ground.

6. Delay from commanding Hi-Z or 0V to beginning slope. Does not apply to current limit or overtemperature shutdown conditions.

7. The MIC2562A uses VCC3 IN for operation. For single 5V supply systems, connect 5V to both VCC3 IN and VCC5 IN. See “Applications Information”

section for further details.

8. VPP IN is not required for operation.

9. VPP IN must be either high impedance or greater than or approximately equal to the highest voltage VCC in the system. For example, if both 3.3V

and 5V are connected to the MIC2562A, VPP IN must be either 5V, 12V, or high impedance.

10. A 10kΩ pull-up resistor is connected between FLAG and VCC3 IN.

June 2004 5 M9999-062204

MIC2562A Micrel

AB CD

/FLAG

12V

3.3V

EF G JH K

Enable V

to 3.3V

Output

to 12V

to 3.3V V

OFF V

to 5V V

to 12V V

to 5V V

OFF VPP

to 12V V

OFF

Figure 1. MIC2562A VPP Timing Diagram

VPP Enable is shown generically: refer to the timing tables. At time “A,” VPP = 3.3V is selected. At “B,” VPP is set to 12V. At

“C,” VPP = 3.3V (from 12V). At “D,” VPP is disabled. At “E,” VPP is programmed to 5V. At “F,” VPP is set to 12V. At “G,” VPP is

programmed to 5V. At “H,” VPP is disabled. At “J,” VPP is set to 12V. And at “K,” VPP is again disabled. RL = 100Ω for all

measurements. Load capacitance is negligible.

ABC D

t3t7t5

t8t6

VCC

Enable

VCC

Output

/FLAG

VCC to 3.3V VCC to 5VVCC OFF VCC OFF

3.3V

Figure 2. MIC2562A VCC Timing Diagram

VCC Enable is shown generically: refer to the timing tables for specific control logic input. At time “A,” VCC is programmed to

3.3V. At “B,” VCC is disabled. At “C,” VCC is programmed to 5V. And at “D,” VCC is disabled. RL = 10Ω. FLAG pull-up resistor

is 10kΩ to VCC3 IN.

MIC2562A Micrel

June 2004 6 M9999-062204

VCC5_EN VCC3_EN EN1 EN0 VCC OUT VPP OUT

0000Clamped to Ground High-Z

0001Clamped to Ground High-Z

0010Clamped to Ground High-Z

0011Clamped to Ground 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

MIC2562A-0 Control Logic Table

MIC2562A-1 Control Logic Table

(compatible with Cirrus Logic CL-PD6710 & PD672x-series Controllers)

VCC5_EN VCC3_EN VPP_PGM VPP_VCC VCC OUT VPP OUT

0000Clamped to Ground Clamped to Ground

0001Clamped to Ground High-Z

0010Clamped to Ground High-Z

0011Clamped to Ground 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

1100Clamped to Ground Clamped to Ground

1101Clamped to Ground High-Z

1110Clamped to Ground High-Z

1111Clamped to Ground High-Z

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MIC2562A Micrel

Logic Block Diagram

VCC5_EN

VCC3_EN

VCC3 IN

EN1

VPP

VCC

VPP IN

(optional)

EN0

VCC5 IN

MIC2562

Control

Logic

/FLAG

ILIMIT

/ Thermal

Shutdown

Gate Drive

Generator

OUT

MIC2562A Micrel

June 2004 8 M9999-062204

Applications Information

PC Card VCC and VPP control is easily accomplished using

the MIC2562A PC Card/CardBus slot VCC and VPP power

controller IC. Four control bits determine VCC OUT and

VPP OUT voltage and standby/operate mode condition. VCC

outputs of 3.3V and 5V at the maximum allowable PC Card

current are supported. VPP OUT output voltages of VCC (3.3V

or 5V), VPP, 0V, or a high impedance state are available.

When the VCC 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 VCC 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

VCC.

The MIC2562A operates from the computer system’s main

power supply. Device logic and internal MOSFET drive is

generated internally by charge pump voltage multipliers

powered from VCC3 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 VCC3 IN, VCC5 IN, and VPP IN inputs

with 1µF capacitors to improve output ripple. As all internal

device logic and comparison functions are powered from the

VCC3 IN line, the power supply quality of this line is the most

important, and a bypass capacitor may be necessary for

some layouts. Both VCC OUT and VPP OUT pins may use

0.01µF to 0.1µF 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

PCMCIA PC Card Specification (March 1995), including the

CardBus option. One MIC2562A is required for each PC Card

slot.

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 VCC

level, the controller commands this change by disabling VCC,

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

voltage.

VCC switches are turned ON and OFF slowly. If commanded

to immediately switch from one VCC 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. VPP 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 (VCC3 IN, VCC5 IN) = (0,0) to the

MIC2562A, 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.

Internal device control logic, MOSFET drive and bias voltage

is powered from VCC3 IN. The high voltage bias is generated

by an internal charge pump quadrupler. Systems without

3.3V may connect VCC3 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 VPP supply pins per

card slot. The two VPP supply pins may be programmed to

different voltages. VPP is primarily used for programming

Flash memory cards. Implementing two independent VPP

voltages is easily accomplished with the MIC2562A and a

MIC2557 PCMCIA VPP switching matrix. Figure 3 shows this

full configuration, supporting independent VPP and both 5.0V

and 3.3V VCC operation. However, few logic controllers

support multiple VPP — most systems connect VPP1 to VPP2

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 VPP IN (nominally +12V) to VPP OUT. The low on

resistance of the MIC2562A switch allows using a small

bypass capacitor on the VPP OUT pins, with the main filtering

action performed by a large filter capacitor on VPP IN (usually

the main power supply filter capacitor is sufficient). Using a

small-value capacitor such as 0.1µF on the output causes

little or no timing delays. The VPP OUT transition from VCC to

12.0V typically takes 250µs. After programming is com-

pleted, the controller outputs a (EN1, EN0) = (0,1) to the

MIC2562A, which then reduces VPP OUT to the VCC 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 VCC 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 VCC OUT and VPP 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.

June 2004 9 M9999-062204

MIC2562A Micrel

System

Power

Supply

PCMCIA

Card Slot

Controller

MIC2562

PCMCIA

Card Slot

3.3V

12V

EN0

EN1

VPP1

VCC

VPP IN

(opt) VCC5INVCC3 IN

VCC5_EN

VCC3_EN

VPP2

MIC2557

EN0

EN1

V IN

PP VDD

VPP OUT

VCC

System

Power

Supply

PCMCIA

Card Slot

Controller

MIC2562

PCMCIA

Card Slot

3.3V

12V

(opt)

EN0

EN1

VPP1

VCC

VPP IN

(opt) VCC5 IN

VCC3 IN

VCC5_EN

VCC3_EN

VPP2

Figure 3. MIC2562A PC Card Slot Power Control Application

with Dual VCC (5V and 3.3V) and Separate VPP1 and VPP2

Figure 4. Typical MIC2562A PC Card Slot Power Control Application

with Dual VCC (5V and 3.3V)

Note: VPP1 and VPP2 are driven together.

MIC2562A Micrel

June 2004 10 M9999-062204

System

Power

Supply

PCMCIA

Card Slot

Controller

MIC2562

PCMCIA

Card Slot

12V

(opt)

EN0

EN1

VPP1

VCC

VPP IN

(opt) VCC5 IN

VCC3 IN

VCC5_EN

VCC3_EN

VPP2

Figure 5. PC Card Slot Power Control Application Without an Available 3.3V VCC

Note: VCC3 IN and VCC5 IN are driven together. The MIC2562A is powered by the VCC3 IN line. In this configuration,

VCC OUT will be 5V when either VCC3 or VCC5 is enabled from the logic table. Take advantage of the lower switch resistance

of the VCC5 switch by using the VCC5_EN control as your main VCC switch.

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MIC2562A Micrel

Package Information

45°3°–6°

0.244 (6.20)

0.228 (5.80)

0.344 (8.75)

0.337 (8.55)

0.006 (0.15)

SEATING

PLANE

0.026 (0.65)

MAX)0.016 (0.40)

TYP

0.154 (3.90)

0.057 (1.45)

0.049 (1.25)

0.193 (4.90)

0.050 (1.27)

TYP

PIN 1

DIMENSIONS:

INCHES (MM)

14-Pin Narrow SOIC (M)

Rev. 01

16-Pin TSSOP (TS)

MIC2562A Micrel

June 2004 12 M9999-062204

MICREL, INC. 1849 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.

Micrel Products are not designed or authorized for use as components in life support appliances, devices or systems where malfunction of a product can

reasonably be expected to result in personal injury. Life support devices or systems are devices or systems that (a) are intended for surgical implant into

the body or (b) support or sustain life, and whose failure to perform can be reasonably expected to result in a significant injury to the user. A Purchaser’s

use or sale of Micrel Products for use in life support appliances, devices or systems is at Purchaser’s own risk and Purchaser agrees to fully indemnify

Micrel for any damages resulting from such use or sale.