MAXIM MAX1930 Technical data
MAX1930
Current-Limited Switch for Two USB Ports
________________________________________________________________ Maxim Integrated Products 1
OUT
1
2
87OUT
OUTIN
IN
GND
SO
TOP VIEW
3
4
6
5
MAX1930
OUTNC
EN
Typical Operating Circuit
19-2385; Rev 2; 11/02
Pin Configuration
Ordering Information
General Description
The MAX1930 current-limited 70mΩ switch with built-in
fault blanking provides an accurate, preset 1.2A to 2.3A
current limit, making it ideal for dual USB applications.
Its low quiescent supply current (16µA) and standby
current (1µA) conserve battery power in portable applications. The MAX1930 operates with inputs from 2.7V to
5.5V, making it ideal for both 3V and 5V systems.
The MAX1930 has several safety features to ensure that
the USB port is protected. Built-in thermal-overload
protection limits power dissipation and junction temperature. The device also has accurate internal current-limiting
circuitry to protect the input supply against overload.
The MAX1930 is offered in a space-saving 8-pin SO
package and operates over the extended (-40°C to
+85°C) temperature range.
Applications
Notebook Computers
USB Ports and Hubs
Docking Stations
Features
♦ Pin Compatible with TPS2010–TPS2013
♦ Accurate Current Limit (1.2A min, 2.3A max)
♦ 125mΩ (max) High-Side MOSFET
♦ Short-Circuit and Thermal Protection
♦ Undervoltage Lockout
♦ 16µA Quiescent Supply Current
♦ 1µA (max) Standby Supply Current
♦ 2.7V to 5.5V Supply Range
♦ UL Recognized: UL# E211395
PART TEMP RANGE PIN-PACKAGE
MAX1930ESA -40°C to +85°C 8 SO
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.
INPUT
2.7V TO 5.5V
OFF
ON
IN OUTPUTOUT
MAX1930
EN
GND
MAX1930
Current-Limited Switch for Two USB Ports
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, EN to GND ..........................................................-0.3V to +6V
OUT to GND ................................................-0.3V to (V
IN
+ 0.3V)
Maximum Switch Current.........................2.3A (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, 10s) .................................+300°C
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
OPERATING CONDITION
Input Voltage V
IN
2.7 5.5 V
POWER SWITCH
TA = +25°CV
IN
= 4.4V to 5.5V 70
VIN = 4.4V to 5.5V
Switch Static Drain-Source
On-Resistance
)
TA = 0°C to +85°C
V
IN
= 3V 72
mΩ
Switch Turn-On Time t
ON
I
LOAD
= 400mA 80
µs
Switch Turn-Off Time t
OFF
I
LOAD
= 400mA 3 6 20 µs
ENABLE INPUT (EN)
VIN = 2.7V to 3.6V 2.0
EN High-Level Input Voltage V
IH
VIN = 3.7V to 5.5V 2.4
V
EN Low-Level Input Voltage V
IL
VIN = 2.7V to 5.5V 0.8 V
EN Input Current V EN = VIN or GND -1 +1 µA
Startup Time
V
IN
= 5V, C
OUT
= 150µF from EN driven low
to 50% full V
OUT
1ms
CURRENT LIMIT
Overload Output Current I
LIMIT
Force V
OUT
to 4.5V 1.2
2.3 A
Short-Circuit Output Current I
SC
OUT shorted to GND 1 1.5 A
SUPPLY CURRENT
Supply Current, Low-Level Input
V EN = VIN = V
OUT
= 5.5V
1µA
Timer not running 16 25
Supply Current, High-Level Input
I
Q
V EN = 0, I
OUT
= 0
Timer running 35
µA
TA = +25°C
2
Supply Leakage Current
V
EN
= VIN = 5.5V,
V
OUT
= 0
T
A
= 0°C to +85°C15
µA
UNDERVOLTAGE LOCKOUT
Undervoltage Lockout UVLO Rising edge, 100mV hysteresis 2.0 2.4 2.6 V
THERMAL SHUTDOWN
Thermal-Shutdown Threshold
°C
100
R
DS(ON
125
150
200
1.75
0.002
0.01
165
MAX1930
Current-Limited Switch for Two USB Ports
_______________________________________________________________________________________ 3
Note 1: Specifications to -40°C are guaranteed by design, not production tested.
ELECTRICAL CHARACTERISTICS
(VIN= 5V, TA= -40°C to +85°C, unless otherwise noted.) (Note 1)
PARAMETER
CONDITIONS
OPERATING CONDITION
Input Voltage V
IN
3.0 5.5 V
POWER SWITCH
VIN = 4.4V to 5.5V
Switch Static Drain-Source
On-Resistance
)
VIN = 3V
mΩ
Switch Turn-On Time t
ON
I
LOAD
= 400mA
µs
Switch Turn-Off Time t
OFF
I
LOAD
= 400mA 1 20 µs
ENABLE INPUT (EN)
VIN = 3V to 3.6V 2.0
EN High-Level Input Voltage V
IH
VIN = 3.7V to 5.5V 2.4
V
EN Low-Level Input Voltage V
IL
VIN = 3V to 5.5V 0.8 V
EN Input Current V EN = VIN or GND -1 +1 µA
CURRENT LIMIT
Overload Output Current I
LIMIT
Force V
OUT
to 4.5V 1.2 2.3 A
Short-Circuit Output Current I
SC
OUT shorted to GND 1.5 A
SUPPLY CURRENT
Supply Current, Low-Level Input
V EN = VIN = V
OUT
= 5.5V 2 µA
Supply Current, High-Level Input
I
Q
V
EN
= GND, I
OUT
= 0, timer not running 25 µA
Supply Leakage Current V EN = VIN = 5.5V, V
OUT
= GND 15 µA
UNDERVOLTAGE LOCKOUT
Undervoltage Lockout UVLO Rising edge, 100mV hysteresis 2.0 2.9 V
Typical Operating Characteristics
(Circuit of Figure 2, VIN= 5V, TA = +25°C, unless otherwise noted.)
0
6
4
2
8
10
12
14
16
18
20
0 0.5 2.0 2.51.0 1.5 3.0 3.5 4.0 4.5 5.0 5.5
QUIESCENT CURRENT vs. INPUT VOLTAGE
MAX1930 toc01
INPUT VOLTAGE (V)
QUIESCENT CURRENT (µA)
I
OUT
= 0
VEN = 0
14.5
14.0
15.5
15.0
16.5
16.0
17.5
17.0
18.0
-40 -15 10 35 60 85
QUIESCENT CURRENT vs. TEMPERATURE
MAX1930 toc02
TEMPERATURE (°C)
QUIESCENT CURRENT (µA)
VIN = 5V
VIN = 3V
I
OUT
= 0
100
0.01
OFF SUPPLY CURRENT
vs. TEMPERATURE
0.1
1
10
MAX1930 toc03
TEMPERATURE (°C)
OFF SUPPLY CURRENT (nA)
-40 -15 10 35 60 85
EN = IN
OUT = OPEN
SYMBOL
R
DS(ON
MIN TYP MAX UNITS
125
150
200
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