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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
For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800.
For small orders, phone 1-800-835-8769.
USB Current-Limited Switch
in Pin-Compatible Package
MAX1607
ABSOLUTE MAXIMUM RATINGS
IN,
EN, OC
to GND .....................................................-0.3 to +6V
OUT to GND ................................................-0.3V to (V
IN
+ 0.3V)
Maximum Switch Current.........................1.2A (internally limited)
OUT Short-Circuit to GND ..........................................Continuous
Continuous Power Dissipation (T
A
= +70°C)
8-Pin SO (derate 5.88mW/°C above +70°C)................471mW
Operating Temperature Range (extended) .........-40°C to +85°C
Storage Temperature Range .............................-65°C to +150°C
Lead Temperature (soldering, 10sec) .............................+300°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.
ELECTRICAL CHARACTERISTICS
(V
IN
= +5V,
T
A
= 0°C to +85°C,
unless otherwise noted. Typical values are at T
A
= +25°C.)
PARAMETER
OPERATING CONDITION
Input Voltage
POWER SWITCH
Switch Static Drain-Source
On-State Resistance
Switch Turn-On Time
Switch Turn-Off Time
ENABLE INPUT (EN)
EN
High-Level Input Voltage
EN
Low-Level Input Voltage
EN
Input Current
Start-Up Time
CURRENT LIMIT
Overload Output Current
Short-Circuit Output Current
SUPPLY CURRENT
Supply Current, Low-Level Input
Supply Current, High-Level
Input
Supply Leakage Current
UNDERVOLTAGE LOCKOUT
Undervoltage Lockout
OVERCURRENT (OC)
OC
Output Low Voltage
OC
Off-State Current
OC
Blanking Timeout Period
THERMAL SHUTDOWN
Thermal Shutdown Threshold
2
+165
°C
t
BL
V
OL
I
SINK
= 1mA, V
IN
= 3V
V
IN
= V
OC
= 5V
From overcurrent condition to
OC
assertion
7
10
0.4
1
13
V
µA
ms
UVLO
Rising edge, 100mV hysteresis
2.0
2.4
2.6
V
I
Q
V
EN
= V
IN
= V
OUT
= 5.5V
V
EN
= GND, I
OUT
= 0
V
EN
= V
IN
= 5.5V,
V
OUT
= GND
Timer not running
Timer running
T
A
= +25°C
T
A
= 0°C to +85°C
0.001
14
35
0.01
2
15
1
25
µA
µA
µA
I
LIMIT
I
SC
Force V
OUT
to 4.5V
OUT shorted to GND
700
850
500
1000
700
mA
mA
V
IH
V
IL
V
IN
= 2.7V to 3.6V
V
IN
= 3.7V to 5.5V
V
IN
= 2.7V to 5.5V
V
EN
= V
IN
or GND
V
IN
= 5V, C
OUT
= 150µF from
EN
driven
low to 50% full V
OUT
-1
1
2.0
2.4
0.8
1
V
V
µA
ms
T
A
= +25°C
R
DS(ON)
t
ON
t
OFF
T
A
= 0°C to +85°C
I
LOAD
= 400mA
I
LOAD
= 400mA
3
V
IN
= 4.4V to 5.5V
V
IN
= 4.4V to 5.5V
V
IN
= 3V
72
80
6
60
90
125
150
200
20
µs
µs
mΩ
V
IN
2.7
5.5
V
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
_______________________________________________________________________________________
USB Current-Limited Switch
in Pin-Compatible Package
ELECTRICAL CHARACTERISTICS
(V
IN
= +5V,
T
A
= -40°C to +85°C,
unless otherwise noted.) (Note 1)
PARAMETER
OPERATING CONDITION
Input Voltage
POWER SWITCH
Switch Static Drain-Source
On-State Resistance
Switch Turn-On Time
Switch Turn-Off Time
ENABLE INPUT (EN)
EN
High-Level Input Voltage
EN
Low-Level Input Voltage
EN
Input Current
CURRENT LIMIT
Overload Output Current
Short-Circuit Output Current
SUPPLY CURRENT
Supply Current, Low-Level Input
Supply Current, High-Level
Input
Supply Leakage Current
UNDERVOLTAGE LOCKOUT
Undervoltage Lockout
OVERCURRENT (OC)
OC
Output Low Voltage
OC
Off-State Current
OC
Blanking Timeout Period
t
BL
UVLO
V
OL
Rising edge, 100mV hysteresis
I
SINK
= 1mA, V
IN
= 3V
V
IN
= V
OC
= 5V
From overcurrent condition to
OC
assertion
6
2.0
2.9
0.4
1
14
V
V
µA
ms
I
Q
V
EN
= V
IN
= V
OUT
= 5.5V
V
EN
= GND, I
OUT
= 0, timer not running
V
EN
= V
IN
= 5.5V, V
OUT
= GND
2
25
15
µA
µA
µA
I
LIMIT
I
SC
Force V
OUT
to 4.5V
OUT shorted to GND
640
1060
750
mA
mA
V
IH
V
IL
V
IN
= 3.0V to 3.6V
V
IN
= 3.7V to 5.5V
V
IN
= 3.0V to 5.5V
V
EN
= V
IN
or GND
-1
2.0
2.4
0.8
1
V
V
µA
R
DS(ON)
t
ON
t
OFF
V
IN
= 4.4V to 5.5V
V
IN
= 3V
I
LOAD
= 400mA
I
LOAD
= 400mA
1
125
150
200
20
mΩ
µs
µs
V
IN
3.0
5.5
V
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
MAX1607
Note 1:
Specifications to -40°C are guaranteed by design, not production tested.
_______________________________________________________________________________________
3
USB Current-Limited Switch
in Pin-Compatible Package
MAX1607
Typical Operating Characteristics
(V
IN
= +5V, T
A
= +25°C, unless otherwise noted.)
OFF SUPPLY CURRENT
vs. TEMPERATURE
V
EN
= V
IN
OFF SUPPLY CURRENT (nA)
10
MAX1607-03
QUIESCENT CURRENT vs. INPUT VOLTAGE
MAX1607-01
QUIESCENT CURRENT vs. TEMPERATURE
V
IN
= 5V
15
QUIESCENT CURRENT (µA)
14
13
12
11
10
9
0.01
-40
-20
0
20
40
60
80
100
-40
-20
TEMPERATURE (°C)
V
IN
= 3V
MAX1607-02
16
14
QUIESCENT CURRENT (µA)
12
10
8
6
4
2
0
0
V
EN
= GND
I
OUT
= 0
16
100
1
0.1
1
2
3
4
5
6
INPUT VOLTAGE (V)
0
20
40
60
TEMPERATURE (°C)
80
100
OFF SWITCH CURRENT
vs. TEMPERATURE
V
EN
= V
IN
MAX1607-04
NORMALIZED ON-RESISTANCE
vs. TEMPERATURE
I
OUT
= 425mA
1.2
NORMALIZED R
ON
1.0
0.8
0.6
0.4
MAX1607-05
NORMALIZED OUTPUT CURRENT
vs. OUTPUT VOLTAGE
I
LIMIT
MAX1607-06
1000
1.4
1.2
NORMALIZED OUTPUT CURRENT
1.0
0.8
SHORT-CIRCUIT CURRENT
0.6
0.4
0.2
0
OFF SWITCH CURRENT (nA)
100
10
1
0.1
0.2
0
-40
-20
0
20
40
60
80
100
-40
-20
0
20
40
60
80
100
TEMPERATURE (°C)
TEMPERATURE (°C)
0.01
0
1
2
3
4
5
6
OUTPUT VOLTAGE (V)
TURN-ON TIME vs. TEMPERATURE
MAX1607-07
TURN-OFF TIME vs. TEMPERATURE
MAX1607-08
FAULT-BLANKING TIMEOUT
vs. TEMPERATURE
MAX1607-09
160
140
120
I
LOAD
= 425mA
V
IN
= 3V
7
6
5
t
OFF
(µs)
4
3
2
1
0
I
LOAD
= 425mA
V
IN
= 5V
12
FAULT-BLANKING TIMEOUT (ms)
10
8
6
4
2
0
100
t
ON
(µs)
80
60
40
20
0
-40
-20
0
20
40
60
80
100
TEMPERATURE (°C)
V
IN
= 5V
V
IN
= 3V
V
IN
= 3V OR 5V
I
OUT
= 850mA
-40
-20
0
20
40
60
80
100
-40
-20
0
20
40
60
80
100
TEMPERATURE (°C)
TEMPERATURE (°C)
4
_______________________________________________________________________________________
USB Current-Limited Switch
in Pin-Compatible Package
Typical Operating Characteristics (continued)
(V
IN
= +5V, T
A
= +25°C, unless otherwise noted.)
MAX1607
CURRENT-LIMIT AND OC RESPONSE
MAX1607-10
CURRENT-LIMIT RESPONSE
MAX1607-11
SWITCH TURN-ON TIME
MAX1607-12
CH1
CH1
CH1
CH2
CH2
CH2
CH3
CH3
CH3
CH4
2ms/div
CH1 = V
IN
, 200mV/div, AC-COUPLED
CH2 = V
OUT
, 5V/div
CH3 = V
OC
, 5V/div
CH4 = I
OUT
, 500mA/div
CH4
10µs/div
CH1 = V
IN
, 200mV/div, AC-COUPLED
CH2 = V
OUT
, 5V/div
CH3 = V
OC
, 5V/div
CH4 = I
OUT
, 1A/div
CH4
20µs/div
CH1 = V
OUT
, 5V/div
CH2 = V
EN
, 5V/div
CH3 = V
OC
, 5V/div
CH4 = I
OUT
, 200mA/div
SWITCH TURN-OFF TIME
MAX1607-13
START-UP TIME
(TYPICAL USB APPLICATION)
CH1
MAX1607-14
CH1
CH2
CH2
FULL CURRENT LIMIT CHARGES CAPACITOR
RESISTOR LOAD CURRENT
CH3
CH3
CH4
CH4
1µs/div
CH1 = V
OUT
, 5V/div
CH2 = V
EN
, 5V/div
CH3 = V
OC
, 5V/div
CH4 = I
OUT
, 200mA/div
1ms/div
V
IN
= 5V, R
L
= 15Ω, C
L
= 150µF
CH1 = V
OUT
, 5V/div
CH2 = V
EN
, 5V/div
CH3 = I
IN
, 500mA/div
CH4 = V
OC
, 5V/div
SHORT-CIRCUIT
CURRENT LIMIT
_______________________________________________________________________________________
5

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