MAX1694EUB-T Maxim Integrated, MAX1694EUB-T Datasheet

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MAX1694EUB-T

Manufacturer Part Number
MAX1694EUB-T
Description
Power Switch ICs - USB USB Current-Limited Switch w/Fault Blank
Manufacturer
Maxim Integrated
Datasheet
1.MAX1694EUB-T.pdf (9 pages)

Specifications of MAX1694EUB-T

Supply Voltage - Min
2.7 V
Supply Voltage - Max
5.5 V
Maximum Operating Temperature
+ 85 C
Minimum Operating Temperature
- 40 C
Mounting Style
SMD/SMT
Number Of Switches
Single

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Part Number:
MAX1694EUB-T
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The MAX1693/(MAX1693H)/MAX1694 are current-limit-
ed, 60mΩ switches with built-in fault blanking. Their
accurate preset current limit of 0.7A to 1.0A makes them
ideally suited for USB applications. Their low quiescent
supply current (14µA) and shutdown current (1µA) con-
serve battery power in portable applications. The
MAX1693/(MAX1693H)/MAX1694 operate with inputs
from 2.7V to 5.5V, making them ideal for both 3V and 5V
systems.
A fault signal notifies the microprocessor that the inter-
nal current limit has been reached. A 10ms fault-blank-
ing 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 fault blanking also prevents a fault signal from
being issued when the device is powering up.
In the MAX1693/(MAX1693H), an output overcurrent
condition causes the switch to current limit at 0.7A to
1.0A and FAULT to go low after the 10ms blanking peri-
od. When the overcurrent condition is removed, FAULT
returns to its high-impedance state. In the MAX1694,
any overcurrent longer than 10ms will latch the switch
open and set FAULT low. The latch is cleared by cycling
the ON input or by powering up the device again. This
feature saves power by preventing the device from ther-
mally cycling on and off in case of a persistent short-cir-
cuit condition.
The MAX1693/(MAX1693H)/MAX1694 have several
safety features to ensure that the USB port is protected.
Built-in thermal-overload protection limits power dissi-
pation and junction temperatures. All devices have
accurate internal current-limiting circuitry to protect the
input supply against overload. They are available in
space-saving 10-pin µMAX packages.
19-1518; Rev 2; 9/01
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.
TOP VIEW
(ON) ON
OUT
OUT
IN
IN
_______________________________________________________________ Maxim Integrated Products
1
2
3
4
5
General Description
(MAX1693H)
MAX1693
MAX1694
µMAX
Pin Configuration
10
9
8
7
6
OUT
IN
OUT
FAULT
GND
USB Current-Limited Switches
o Accurate Current Limit (0.7A min, 1.0A max)
o Guaranteed 0.75A Short-Circuit Protection
o 10ms Internal Fault-Blanking Timeout
o No Fault Signal During Power-Up
o Latched FAULT Output Turns Off Power Switch
o Thermal Shutdown Protection
o 2.7V to 5.5V Supply Range
o 14µA Supply Current
o Small 10-Pin µMAX Package
o UL Recognized–#E211935
MAX1693EUB
MAX1693HEUB
MAX1694EUB
(MAX1694)
2.7V TO 5.5V
PART
USB Ports and Hubs
Notebook Computers
Portable Equipment
Docking Stations
Hot Plug-In Power Supplies
Battery-Charger Circuits
INPUT
ON
(OFF)
with Fault Blanking
(ON)
OFF
Typical Operating Circuit
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
IN
FAULT
ON
TEMP RANGE
(ON)
Ordering Information
(MAX1693H)
MAX1693
MAX1694
GND
OUT
Applications
10 µMAX
10 µMAX
10 µMAX
PIN-PACKAGE
Features
OUTPUT
1

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MAX1694EUB-T Summary of contents

Page 1

... Supply Range o 14µA Supply Current o Small 10-Pin µMAX Package o UL Recognized–#E211935 USB Ports and Hubs Notebook Computers Portable Equipment Docking Stations Hot Plug-In Power Supplies Battery-Charger Circuits PART MAX1693EUB MAX1693HEUB MAX1694EUB INPUT 2.7V TO 5.5V 10 OUT OUT 7 FAULT 6 GND ...

Page 2

... Start-Up Time Switch Turn-On Time t ON Switch Turn-Off Time t OFF Thermal Shutdown Threshold 2 _______________________________________________________________________________________ Operating Temperature Range MAX1693EUB/MAX1693HEUB/ + 0.3V) IN MAX1694EUB ..................................................-40°C to +85°C Storage Temperature Range .............................-65°C to +150°C Lead Temperature (soldering, 10s) .................................+300°C = +25°C.) A CONDITIONS Timer not running V = GND ( (ON ...

Page 3

ELECTRICAL CHARACTERISTICS (V = +5V -40°C to +85°C, unless otherwise noted.) (Note PARAMETER SYMBOL Operating Voltage V Quiescent Current Off-Supply Current Undervoltage Lockout UVLO Off-Switch Leakage On-Resistance R Current Limit I LIMIT Continuous Short-Circuit Current ...

Page 4

USB Current-Limited Switches with Fault Blanking (V = +5V +25°C, unless otherwise noted QUIESCENT CURRENT vs. INPUT VOLTAGE GND ( (ON OUT ...

Page 5

T = +25°C, unless otherwise noted FAULT-BLANKING TIMEOUT vs. TEMPERATURE 850mA OUT -40 - TEMPERATURE ...

Page 6

USB Current-Limited Switches with Fault Blanking (V = +5V +25°C, unless otherwise noted MAX1694 OVERCURRENT TO FAULT AND SWITCH LATCHED OFF 2ms/div CH1 = V , 5V/div; CH2 = I , 5V/div; FAULT ...

Page 7

... Fault-Indicator Output. This open-drain output goes low when the device is in thermal shut- down, undervoltage lockout sustained (>10ms) current-limit condition. For the MAX1694 only, this output latches low when asserted, and the power switch is turned off until the latch is reset. ...

Page 8

USB Current-Limited Switches with Fault Blanking The MAX1693/(MAX1693H)/MAX1694 feature 10ms fault blanking. Fault blanking allows current-limit faults, including momentary short-circuit faults that occur when hot-swapping a capacitive load, and also ensures that no fault is issued during power-up. When a ...

Page 9

... Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 _____________________ 9 © 2001 Maxim Integrated Products ...

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