MAXIM MAX1693, MAX1693H, MAX1694 User Manual
General Description
The MAX1693/(MAX1693H)/MAX1694 are current-limited, 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) conserve 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 internal current limit has been reached. A 10ms fault-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 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 period. 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 thermally cycling on and off in case of a persistent short-circuit condition.
The MAX1693/(MAX1693H)/MAX1694 have several
safety features to ensure that the USB port is protected.
Built-in thermal-overload protection limits power dissipation 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.
Features
♦ Accurate Current Limit (0.7A min, 1.0A max)
♦ Guaranteed 0.75A Short-Circuit Protection
♦ 10ms Internal Fault-Blanking Timeout
♦ No Fault Signal During Power-Up
♦ Latched FAULT Output Turns Off Power Switch
(MAX1694)
♦ Thermal Shutdown Protection
♦ 2.7V to 5.5V Supply Range
♦ 14µA Supply Current
♦ Small 10-Pin µMAX Package
♦ UL Recognized–#E211935
Applications
USB Ports and Hubs
Notebook Computers
Portable Equipment
Docking Stations
Hot Plug-In Power Supplies
Battery-Charger Circuits
MAX1693/(MAX1693H)/MAX1694
USB Current-Limited Switches
with Fault Blanking
_______________________________________________________________ Maxim Integrated Products 1
Typical Operating Circuit
19-1518; Rev 2; 9/01
PART
MAX1693EUB
MAX1693HEUB
-40°C to +85°C
-40°C to +85°C
TEMP RANGE PIN-PACKAGE
10 µMAX
10 µMAX
Pin Configuration
Ordering Information
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.
MAX1694EUB
-40°C to +85°C 10 µMAX
(ON)
OFF
IN
FAULT
ON
(ON)
MAX1693
(MAX1693H)
MAX1694
GND
OUT
TOP VIEW
INPUT
2.7V TO 5.5V
1
IN
2
OUT
IN
MAX1693
3
(MAX1693H)
MAX1694
4
5
µMAX
10
OUT
9
IN
8
OUT
7
FAULTOUT
GND(ON) ON
6
ON
(OFF)
OUTPUT
MAX1693/(MAX1693H)/MAX1694
USB Current-Limited Switches
with Fault Blanking
2 _______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS
(VIN= +5V, TA= 0°C to +85°C, unless otherwise noted. Typical values are at TA= +25°C.)
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 (ON), FAULT to GND....................................-0.3V to +6V
OUT to GND ................................................-0.3V to (V
IN
+ 0.3V)
Maximum Continuous Switch Current .....1.2A (internally limited)
OUT Short Circuit to GND ..........................................Continuous
Continuous Power Dissipation (T
A
= +70°C)
10-Pin µMAX (derate 5.6mW/°C above +70°C) ............444mW
Operating Temperature Range
MAX1693EUB/MAX1693HEUB/
MAX1694EUB ..................................................-40°C to +85°C
Storage Temperature Range .............................-65°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C
V
ON
(ON)
= GND (VIN)
I
OUT
= 0
I
SINK
= 1mA, VIN= 3V
V
ON
(ON)
= VINor GND
(Note 1)
VIN= 2.7V to 3.6V
VIN= 2.7V to 5.5V
TA= +25°C
V
ON
(ON)
= VIN= V
OUT
= 5.5V (VON= GND)
Rising edge, 100mV hysteresis
V
ON
(ON)
= VIN(GND)
V
IN
= 5.5V,
V
OUT
= GND
OUT shorted to GND, MAX1693/(MAX1693H)
only (Note 2)
CONDITIONS
V0.4V
OL
FAULT Output Logic Low
Voltage
µA±1
ON (ON) Input Leakage
V
2
V
IH
ON (ON) Input Logic High
Voltage
V0.8V
IL
ON (ON) Input Logic Low Voltage
mA500 700I
SC
Continuous Short-Circuit
Current Limit
µA
35
I
Q
14 25
V2.7 5.5V
IN
Operating Voltage
Quiescent Current
mA700 850 1000I
LIMIT
Current Limit
mΩ
72 150
R
ON
On-Resistance
125
60 90
µA0.001 1Off-Supply Current
V2.0 2.6UVLOUndervoltage Lockout
0.01 2
µA
15
Off-Switch Leakage
UNITSMIN TYP MAXSYMBOLPARAMETER
Timer not running
Timer running
TA= +25°C
TA= 0°C to +85°C
VIN= 4.4V to 5.5V
VIN= 4.4V to 5.5V
VIN= 3V
VIN= V
FAULT
= 5.5V µA1
FAULT Output High Leakage
Current
From overcurrent condition to FAULT assertion
ms71013t
FB
Fault-Blanking Timeout Period
VIN= 5V, C
OUT
= 150µF, RL= 15Ω,
from ON (ON) driven low (high) to 50% full V
OUT
ms1Start-Up Time
I
LOAD
= 400mA µs3620t
OFF
Switch Turn-Off Time
I
LOAD
= 400mA µs80 200t
ON
Switch Turn-On Time
°C165Thermal Shutdown Threshold
TA= 0°C to +85°C
VIN= 3.7V to 5.5V 2.4
MAX1693/(MAX1693H)/MAX1694
USB Current-Limited Switches
with Fault Blanking
_______________________________________________________________________________________ 3
ELECTRICAL CHARACTERISTICS
(VIN= +5V, TA= -40°C to +85°C, unless otherwise noted.) (Note 3)
VIN= V
FAULT
= 5.5V µA1
VIN= 4.4V to 5.5V
FAULT Output High Leakage
Current
V
ON
(ON)
= GND (GND), I
OUT
= 0, timer not
running
From overcurrent condition to FAULT assertion
I
SINK
= 1mA, VIN= 3V
V
ON
(ON)
= VINor GND
(Note 1)
VIN= 3V to 3.6V
VIN= 3V to 5.5V
ms
V
ON
(ON)
= VIN= V
OUT
= 5.5V (VON= GND)
Rising edge, 100mV hysteresis
VIN= 3V
V
ON
(ON)
= V
IN
= 5.5V, V
OUT
= GND
(V
ON
= GND)
OUT shorted to GND, MAX1693/(MAX1693H)
only (Note 2)
CONDITIONS
614t
FB
Fault-Blanking Timeout Period
I
LOAD
= 400mA µs120t
OFF
Switch Turn-Off Time
I
LOAD
= 400mA µs200t
ON
Switch Turn-On Time
V0.4V
OL
FAULT Output Logic Low
Voltage
µA±1
ON (ON) Input Leakage
V
2
V
IH
ON (ON) Input Logic High
Voltage
V0.8V
IL
ON (ON) Input Logic Low Voltage
mA750
Continuous Short-Circuit
Current Limit
µAI
Q
25
V3 5.5V
IN
Operating Voltage
Quiescent Current
mA640 1060I
LIMIT
Current Limit
150
125
µA2Off-Supply Current
V2.0 2.9UVLOUndervoltage Lockout
µA15Off-Switch Leakage
UNITSMIN TYP MAXSYMBOLPARAMETER
R
ON
On-Resistance mΩ
Note 1: MAX1693/(MAX1693H)’s current limit is tested by forcing V
OUT
to 4.5V. The MAX1694’s current limit is tested by increasing
the output current until the switch is latched off.
Note 2: This specification applies to the MAX1693/(MAX1693H) only. The MAX1694 latches the switch off under a sustained
(>10ms) short-circuit condition.
Note 3: Specifications to -40°C are guaranteed by design, not production tested.
VIN= 3.7V to 5.5V 2.4
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