MAX8586(2004) Ver la hoja de datos (PDF) - Maxim Integrated
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MAX8586 Datasheet PDF : 11 Pages
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19-3449; Rev 0; 11/04
Single 1.2A USB Switch in
3mm x 3mm TDFN
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
PART
MAX8586ETA
Ordering Information
TEMP RANGE
-40°C to +85°C
PIN-
PACKAGE
8 TDFN
3mm x 3mm
(T833-2)
TOP
MARK
AMH
Typical Operating Circuit
Pin Configuration appears at end of data sheet.
INPUT SUPPLY
2.75V TO 5.5V
OUTPUT
FAULT
INDICATOR
ON/OFF
POLARITY
SELECTION
ON/OFF
CONTROL
IN
OUT
MAX8586
FAULT
ENRESET
SEL
ISET
ON
GND
OUTPUT SUPPLY
UP TO 1.2A
AUTO-RESTART
ON/OFF
________________________________________________________________ Maxim Integrated Products 1
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.
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