MAXIM MAX8586 Technical data

General Description

The MAX8586 single current-limited switch controls up to

1.2A to power USB applications and has multiple protec­tion features including thermal shutdown, internal current
limiting, and reverse current protection. The thermal shut­down limits junction temperature during a prolonged
short or overload condition. The internal current-limiting
circuitry protects the input supply against overload and
is programmable using an external resistor. The
MAX8586 meets all IEC specifications for USB ports.

The IC latches off when the output experiences a short
circuit for more than 20ms, saving system power. Auto­restart tests the shorted output with a 25mA current to
determine if the short still exists. Once the short is
removed, the MAX8586 automatically restarts the out­put. An open-drain fault signal notifies the system that
the internal current limit has been reached. A 20ms
fault-blanking feature allows the circuit to ignore
momentary faults such as those caused when hot­swapping into a capacitive load. An ENRESET input is
available to disable the auto-restart function.

The MAX8586 features a SEL input that programs ON
to be either active high or active low. The IC is supplied
in a space-saving, 8-pin, 3mm x 3mm TDFN package.

Applications

USB Ports/Hubs

Desktop/Notebook Computers

PDAs and Palmtop Computers

Docking Stations

Features

o Reverse Current Protection

o Programmable Current Limit Up to 1.2A

o Accurate Current Limit

o Selectable Auto-Restart when Fault Is Removed

o Thermal-Overload Protection

o Selectable Active-High/Low ON Input

o Built-In 20ms Fault Blanking

o Compliant with All USB Specifications

o 2.75V to 5.5V Input Supply Range
o FAULT Indicator Output

o 15kV ESD Protection (with Caps)

o Tiny 8-Pin 3mm x 3mm TDFN Package

MAX8586

Single 1.2A USB Switch in

3mm x 3mm TDFN

________________________________________________________________

Maxim Integrated Products

1

Pin Configuration appears at end of data sheet.

Ordering Information

19-3449; Rev 2; 1/10

EVALUATION KIT

AVAILABLE

Typical Operating Circuit

/V denotes an automotive qualified part.

+

Denotes a lead(Pb)-free/RoHS-compliant package.

For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim's website at www.maxim-ic.com.

PART TEMP RANGE

MAX8586ETA -40°C to +85°C

MAX8586ETA/V+ -40°C to +85°C

PIN-

PACKAGE

8 TDFN

3mm x 3mm

(T833-2)

8 TDFN

3mm x 3mm

(T833-2)

TOP

MARK

AMH

BLU

INPUT SUPPLY

2.75V TO 5.5V

OUTPUT

FAULT

INDICATOR

ON/OFF

POLARITY

SELECTION

ON/OFF

CONTROL

IN OUT

MAX8586

FAULT

SEL

ON

ENRESET

ISET

GND

OUTPUT SUPPLY

UP TO 1.2A

AUTO-RESTART

ON/OFF

MAX8586

Single 1.2A USB Switch in
3mm x 3mm TDFN

2 _______________________________________________________________________________________

ABSOLUTE MAXIMUM RATINGS

ELECTRICAL CHARACTERISTICS

(VIN= VON= V

SEL

= V

ENRESET

= 5V, R

ISET

= 26kΩ to GND, R

FAULT

= 100kΩ pullup to VIN, C

OUT

= 0.1µF, TA= -40°C to +85°C.

Typical values are at T

A

= +25°C, unless otherwise specified.) (Note 1)

Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.

IN, ON, SEL, OUT, FAULT, ISET, ENRESET to GND ..-0.3V to +6V

IN to OUT.....................................................................-6V to +6V

FAULT Sink Current ............................................................20mA

Continuous Power Dissipation

8-Pin 3mm x 3mm TDFN

(derate 24mW/°C above +70°C)................................1951mW

Operating Temperature Range ...........................-40°C to +85°C

Junction Temperature......................................................+150°C

Storage Temperature Range .............................-65°C to +150°C

Soldering Temperature (reflow) .......................................+260°C

Supply Voltage Range 2.75 5.50 V

IN Standby Supply Current VON = 0V 3 6 µA

IN Quiescent Supply Current I

OUT Off-Leakage Current VON = 0V, V

Undervoltage-Lockout Threshold Rising edge, 3% hysteresis (typ) 2.3 2.5 2.7 V

RMS Short-Circuit Current Limit

Short-Circuit/Continuous Current Limit
Transition Threshold

Fault-Blanking Timeout Period From current-limit condition to FAULT falling 8 20 40 ms

PARAMETER CONDITIONS MIN TYP MAX UNITS

VIN = 5V 55

VIN = 3V 65Switch On-Resistance

V

IN

OUT

R

ISET

R

ISET

R

ISET

V

OUT

(I

OUT

V

OUT

(I

OUT

(Note 2) 1 V

= 4.4V 95

= 0A 30 55 µA

= 26kΩ 1.2 1.4 1.6

= 39kΩ 0.800 0.925 1.050Current-Limit Threshold

= 60kΩ 0.5 0.6 0.7

= 0V,
pulsing)

= 0V,
pulsing)

OUT

= 0V

TA = +25°C 0.02 1

= +85°C 0.6

T

A

R

ISET

R

ISET

R

ISET

R

ISET

R

ISET

R

ISET

= 26kΩ 1.35 1.75 2.20

= 39kΩ 1.2Peak Short-Circuit Current Limit

= 60kΩ 0.74

= 26kΩ 0.55

= 39kΩ 0.37

= 60kΩ 0.23

mΩ

µA

A

A (Peak)

A (RMS)

MAX8586

Single 1.2A USB Switch in

3mm x 3mm TDFN

_______________________________________________________________________________________

3

ELECTRICAL CHARACTERISTICS (continued)

(VIN= VON= V

SEL

= V

ENRESET

= 5V, R

ISET

= 26kΩ to GND, R

FAULT

= 100kΩ pullup to VIN, C

OUT

= 0.1µF, TA= -40°C to +85°C.

Typical values are at T

A

= +25°C, unless otherwise specified.) (Note 1)

Note 1: All devices are 100% production tested at T

A

= +25°C. Limits over the operating temperature range are guaranteed by

design.

Note 2: The output voltage at which the device transitions from short-circuit current limit to continuous current limit.

Turn-On Delay

Output Rise Time

Turn-Off Delay from ON

Output Fall Time

Thermal-Shutdown Threshold 15°C hysteresis (typ) +160 °C

ON, SEL, ENRESET Logic Input High Voltage

ON, SEL, ENRESET Logic Input Low Voltage

Logic Input Current TA = +25°C-1+1µA

FAULT Output Low Voltage I
FAULT Output High Leakage Current VIN = 5.5V, TA = +25°C1µA

ISET Current-Limit Trip Point R

ISET External Resistance Range 26 60 kΩ

Auto-Restart Current In latched-off state, V

Auto-Restart Threshold In latched-off state, V

Auto-Restart Delay In latched-off state, V

PARAMETER CONDITIONS MIN TYP MAX UNITS

R

OUT

ON rising to 10% of V
rise time

R

OUT

10% to 90% of V

R

OUT

ON falling to 90% of V

R

OUT

90% to 10% of V

VIN = 2.75V to 4.0V 1.6

V

IN

VIN = 2.75V to 4.0V 0.6

V

IN

SINK

ISET

= 10Ω, C

= 10Ω, C

= 10Ω, C

= 10Ω, C

= 4.0V to 5.5V 2.0

= 4.0V to 5.5V 0.8

= 1mA 0.4 V

= 26kΩ 600 mV

= 1µF, measured from

OUT

OUT

OUT

OUT

OUT

OUT

, does not include

OUT

= 1µF, measured from

= 1µF measured from

OUT

= 1µF, measured from

= 0V 10 25 60 mA

OUT

rising 0.4 0.5 0.6 V

OUT

>1V 8 20 40 ms

OUT

0.5 1.5 4.0 ms

5.5 ms

100 1000 µs

4ms

V

V

MAX8586

Single 1.2A USB Switch in
3mm x 3mm TDFN

4 _______________________________________________________________________________________

Typical Operating Characteristics

(Typical Application Circuit, VIN= VON= V

SEL

= V

ENRESET

= 5V, TA= +25°C, unless otherwise noted.)

QUIESCENT SUPPLY CURRENT

vs. SUPPLY VOLTAGE

40

35

30

25

20

15

SUPPLY CURRENT (µA)

10

5

0

06

SUPPLY VOLTAGE (V)

541 2 3

MAX8586 toc01

SHUTDOWN SUPPLY CURRENT

vs. SUPPLY VOLTAGE

10

9

8

7

6

5

4

3

SUPPLY CURRRENT (µA)

2

1

0

06

SUPPLY VOLTAGE (V)

SWITCH LEAKAGE CURRENT

vs. TEMPERATURE

VON = 0V

603510-15

TEMPERATURE (°C)

VON = 0V

0.50

0.45

MAX8586 toc02

0.40

0.35

0.30

0.25

0.20

0.15

LEAKAGE CURRENT (µA)

0.10

0.05

0

54321

-40 85

MAX8586 toc03

NORMALIZED ON-RESISTANCE

vs. TEMPERATURE

1.50

1.25

ON

1.00

NORMALIZED R

0.75

0.50

-40 85
TEMPERATURE (°C)

CURRENT LIMIT

vs. INPUT VOLTAGE

2.0

1.9

1.8

1.7

1.6

1.5

1.4

CURRENT LIMIT (A)

1.3

1.2

1.1

1.0

2.7 5.5
INPUT VOLTAGE (V)

V

ENRESET

4.13.4

CONTINUOUS CURRENT LIMIT

vs. TEMPERATURE

MAX8586 toc05

CURRENT LIMIT (A)

1.50

1.48

1.46

1.44

1.42

1.40

1.38

1.36

1.34

1.32

1.30

-40 85

1.60

1.58

MAX8586 toc04

1.56

1.54

1.52

1.50

1.48

CURRENT LIMIT (A)

1.46

1.44

V

= 0V

1.42

603510-15

1.40

-40 85
TEMPERATURE (°C)

ENRESET

603510-15

SWITCH ON-TIME

vs. TEMPERATURE

9.0

8.5

MAX8586 toc07

8.0

7.5

7.0

6.5

6.0

ON-TIME (ms)

5.5

= 5V

4.8

5.0

4.5

4.0

R

= 5Ω

LOAD

NO LOAD

MEASURED FROM ON HIGH UNTIL

REACHES 90% OF THE INPUT

V

OUT

-40 85
TEMPERATURE (°C)

603510-15

10

9

MAX8586 toc08

8

7

6

5

4

3

OUTPUT FALL TIME (ms)

2

1

0

MEASURED FROM ON LOW UNTIL
V

-40 85

CURRENT LIMIT

vs. TEMPERATURE

TEMPERATURE (°C)

SWITCH OFF-TIME
vs. TEMPERATURE

FALLS TO 10% OF THE INPUT

OUT

TEMPERATURE (°C)

V

ENRESET

R

LOAD

603510-15

603510-15

= 5V

= 5Ω

MAX8586 toc06

MAX8586 toc09