19-1544; Rev 0; 10/99
USB Current-Limited Switch
in Pin-Compatible Package
General Description
The MAX1607 is a current-limited 60mΩ switch with
built-in fault blanking. Its accurate, preset 0.7A to 1.0A
current limit makes it ideal for USB applications. Its low
quiescent supply current (14µA) and standby current
(1µA) conserve battery power in portable applications.
The MAX1607 operates with inputs from +2.7V to
+5.5V, making it ideal for both 3V and 5V systems.
An overcurrent signal (OC) notifies the microprocessor
that the internal current limit has been reached. A 10ms
overcurrent-blanking feature allows momentary faults
(such as those caused when hot-swapping into a
capacitive load) to be ignored, thus preventing false
alarms to the host system. This blanking also prevents
an
OC
signal from being issued when the device is
powering up.
The MAX1607 has several safety features to ensure that
the USB port is protected. Built-in thermal-overload pro-
tection limits power dissipation and junction tempera-
ture. The device also has accurate internal current-
limiting circuitry to protect the input supply against
overload.
The MAX1607 is a pin-compatible upgrade to Texas
Instruments’ TPS2014, TPS2015, and TPS2041 for USB
applications. The same die is available in a space-saving
10-pin µMAX package (MAX1693) and can be used for
next-generation designs. The MAX1694 is similar to the
MAX1693, but it has a built-in latch that turns off the
power switch in case of a long-term short-circuit condi-
tion.
Features
o
Pin Compatible with TPS2014, TPS2015, and
TPS2041
o
Accurate Current Limit (0.7A min, 1.0A max)
o
Guaranteed 0.75A Short-Circuit Protection
o
10ms Internal
OC
Blanking Timeout
o
No Overcurrent (OC) Signal During Power-Up
o
125mΩ max High-Side MOSFET
o
500mA Continuous Current
o
Short-Circuit and Thermal Protection with
Overcurrent Logic Output
o
1ms Start-Up Time
o
Undervoltage Lockout
o
14µA Quiescent Supply Current
o
1µA max Standby Supply Current
o
+2.7V to +5.5V Supply Range
o
UL Recognition Pending
MAX1607
Ordering Information
PART
MAX1607ESA
TEMP. RANGE
-40°C to +85°C
PIN-PACKAGE
8 SO
Applications
Notebook Computers
USB Ports
USB Hubs
Docking Stations
Typical Operating Circuit
Pin Configuration
INPUT
+2.7V TO +5.5V
IN
OUT
OUTPUT
TOP VIEW
MAX1607
GND
1
IN
2
8
7
OUT
OC
OUT
OUT
OC
ON
OFF
EN
GND
MAX1607
IN
3
6
5
EN
4
SO
________________________________________________________________
Maxim Integrated Products
1
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