General Description

The MAX8586 single current-limited switch controls up to

1.2A to power USB applications and has multiple protec-

tion features including thermal shutdown, internal current

limiting, and reverse current protection. The thermal shut-

down 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. Auto-

restart 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 out-

put. 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 hot-

swapping 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

♦ Reverse Current Protection

♦ Programmable Current Limit Up to 1.2A

♦ Accurate Current Limit

♦ Selectable Auto-Restart when Fault Is Removed

♦ Thermal-Overload Protection

♦ Selectable Active-High/Low ON Input

♦ Built-In 20ms Fault Blanking

♦ Compliant with All USB Specifications

♦ 2.75V to 5.5V Input Supply Range

♦ FAULT Indicator Output

♦ 15kV ESD Protection (with Caps)

♦ UL Listing Pending

♦ Tiny 8-Pin 3mm x 3mm TDFN Package

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 1; 1/09

EVALUATION

KIT

AVAILABLE

PART

TEMP RANGE

PIN-

PACKAGE

TOP

MARK

MAX8586ETA

-40

°C to +85°C

8 TDFN

3mm x 3mm

(T833-2)

AMH

MAX8586ETA/V+

-40

°C to +85°C

8 TDFN

3mm x 3mm

(T833-2)

AMH

INPUT SUPPLY

2.75V TO 5.5V

OUTPUT

FAULT

INDICATOR

ON/OFF

POLARITY

SELECTION

ON/OFF

CONTROL

OUTPUT SUPPLY

UP TO 1.2A

IN

OUT

ENRESET

ISET

FAULT

MAX8586

SEL

ON

GND

AUTO-RESTART

ON/OFF

Typical Operating Circuit

/V

Denotes an automotive qualified part.

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.

+

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