MAX1930ESA+ Fast Delivery |IC PHOENIX CO.,LIMITED

MAX1930ESA+ ,Current-Limited Switch for Two USB PortsELECTRICAL CHARACTERISTICS(V = 5V, T = 0°C to +85°C, unless otherwise noted. Typical values are at ..
MAX1931EUB ,Current-Limited Switch for Single USB PortELECTRICAL CHARACTERISTICS(V = 5V, T = 0°C to +85°C, unless otherwise noted. Typical values are at ..
MAX1931EUB ,Current-Limited Switch for Single USB PortApplicationsON 5 6 GNDUSB Ports and Hubsµ MAXNotebook ComputersPortable EquipmentDocking StationsTy ..
MAX1931EUB ,Current-Limited Switch for Single USB Portapplications. The MAX1931 operates withinputs from 2.7V to 5.5V, making it ideal for both 3V and T ..
MAX1931EUB+ ,Current-Limited Switch for Single USB PortFeaturesThe MAX1931 is a current-limited, 60mΩ switch with♦ 0.5A Guaranteed Output Currentbuilt-in ..
MAX1931EUB+ ,Current-Limited Switch for Single USB PortELECTRICAL CHARACTERISTICS(V = 5V, T = 0°C to +85°C, unless otherwise noted. Typical values are at ..
MAX489ECPD+ ,±15kV ESD-Protected, Slew-Rate-Limited, Low-Power, RS-485/RS-422 TransceiversApplications:EMI and reduce reflections caused by improperly termi-MAX3460–MAX3464: +5V, Fail-Safe, ..
MAX489ECSD ,15kV ESD-Protected / Slew-Rate-Limited / Low-Power / RS-485/RS-422 Transceiversapplications that are not ESD sen-MAX481ECPA 0°C to +70°C 8 Plastic DIPsitive see the pin- and func ..
MAX489ECSD ,15kV ESD-Protected / Slew-Rate-Limited / Low-Power / RS-485/RS-422 TransceiversFeaturesThe MAX481E, MAX483E, MAX485E, MAX487E–MAX491E, ' ESD Protection: ±15kV—Human Body Modelan ..
MAX489ECSD+ ,±15kV ESD-Protected, Slew-Rate-Limited, Low-Power, RS-485/RS-422 TransceiversELECTRICAL CHARACTERISTICS(V = 5V ±5%, T = T to T , unless otherwise noted.) (Notes 1, 2)CC A MIN M ..
MAX489ECSD+ ,±15kV ESD-Protected, Slew-Rate-Limited, Low-Power, RS-485/RS-422 TransceiversApplications:MAX491E, and MAX1487E are low-power transceivers forMAX3430: ±80V Fault-Protected, Fai ..
MAX489ECSD+T ,±15kV ESD-Protected, Slew-Rate-Limited, Low-Power, RS-485/RS-422 TransceiversELECTRICAL CHARACTERISTICS(V = 5V ±5%, T = T to T , unless otherwise noted.) (Notes 1, 2)CC A MIN M ..

MAX1930ESA+
Current-Limited Switch for Two USB Ports
MAX1930
Current-Limited Switch for Two USB Ports
OUT
OUT
OUTIN
GND
TOP VIEW
MAX1930
OUTNCEN
MAX1930OUTPUTOUT
INPUT
2.7V TO 5.5V
OFF
GND
Typical Operating Circuit
19-2385; Rev 2; 11/02
Pin Configuration
Ordering Information
General Description
The MAX1930 current-limited 70mΩswitch 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 appli-
cations. 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 tempera-
ture. 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
FeaturesPin Compatible with TPS2010–TPS2013Accurate Current Limit (1.2A min, 2.3A max)125mΩ(max) High-Side MOSFETShort-Circuit and Thermal ProtectionUndervoltage Lockout16µA Quiescent Supply Current1µA (max) Standby Supply Current2.7V to 5.5V Supply RangeUL Recognized: UL# E211395
PARTTEMP RANGEPIN-PACKAGE
MAX1930ESA-40°C to +85°C8 SO
MAX1930
Current-Limited Switch for Two USB Ports
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, ENto GND..........................................................-0.3V to +6V
OUT to GND................................................-0.3V to (VIN+ 0.3V)
Maximum Switch Current.........................2.3A (internally limited)
OUT Short Circuit to GND..........................................Continuous
Continuous Power Dissipation (TA= +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
PARAMETERSYMBOLCONDITIONSMINTYPMAXUNITS
OPERATING CONDITION
Input VoltageVIN2.75.5V
POWER SWITCH
TA = +25°CVIN = 4.4V to 5.5V70100
VIN = 4.4V to 5.5V125Switch Static Drain-Source
On-ResistanceRDS(ON)TA = 0°C to +85°CVIN = 3V72150
Switch Turn-On TimetONILOAD = 400mA80200µs
Switch Turn-Off TimetOFFILOAD = 400mA3620µs
ENABLE INPUT (EN)
VIN = 2.7V to 3.6V2.0EN High-Level Input VoltageVIHVIN = 3.7V to 5.5V2.4V
EN Low-Level Input VoltageVILVIN = 2.7V to 5.5V0.8V
EN Input CurrentV EN = VIN or GND-1+1µA
Startup TimeVIN = 5V, COUT = 150µF from EN driven low
to 50% full VOUT1ms
CURRENT LIMIT
Overload Output CurrentILIMITForce VOUT to 4.5V1.21.752.3A
Short-Circuit Output CurrentISCOUT shorted to GND11.5A
SUPPLY CURRENT
Supply Current, Low-Level InputV EN = VIN = VOUT = 5.5V0.0021µA
Timer not running1625Supply Current, High-Level InputIQV EN = 0, IOUT = 0Timer running35µA
TA = +25°C0.012Supply Leakage CurrentV EN = VIN = 5.5V,
VOUT = 0TA = 0°C to +85°C15µA
UNDERVOLTAGE LOCKOUT
Undervoltage LockoutUVLORising edge, 100mV hysteresis2.02.42.6V
THERMAL SHUTDOWN
Thermal-Shutdown Threshold165°C
MAX1930
Current-Limited Switch for Two USB Ports
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)
PARAMETERSYMBOLCONDITIONSMINTYPMAXUNITS
OPERATING CONDITION
Input VoltageVIN3.05.5V
POWER SWITCH
VIN = 4.4V to 5.5V125Switch Static Drain-Source
On-ResistanceRDS(ON)VIN = 3V150mΩ
Switch Turn-On TimetONILOAD = 400mA200µs
Switch Turn-Off TimetOFFILOAD = 400mA120µs
ENABLE INPUT (EN)
VIN = 3V to 3.6V2.0EN High-Level Input VoltageVIHVIN = 3.7V to 5.5V2.4V
EN Low-Level Input VoltageVILVIN = 3V to 5.5V0.8V
EN Input CurrentV EN = VIN or GND-1+1µA
CURRENT LIMIT
Overload Output CurrentILIMITForce VOUT to 4.5V1.22.3A
Short-Circuit Output CurrentISCOUT shorted to GND1.5A
SUPPLY CURRENT
Supply Current, Low-Level InputV EN = VIN = VOUT = 5.5V2µA
Supply Current, High-Level InputIQV EN = GND, IOUT = 0, timer not running25µA
Supply Leakage CurrentV EN = VIN = 5.5V, VOUT = GND15µA
UNDERVOLTAGE LOCKOUT
Undervoltage LockoutUVLORising edge, 100mV hysteresis2.02.9V
Typical Operating Characteristics
(Circuit of Figure 2, VIN= 5V, TA = +25°C, unless otherwise noted.)0.52.02.51.01.53.03.54.04.55.05.5
QUIESCENT CURRENT vs. INPUT VOLTAGE
MAX1930 toc01
INPUT VOLTAGE (V)
QUIESCENT CURRENT (
IOUT = 0
VEN = 0
QUIESCENT CURRENT vs. TEMPERATURE
MAX1930 toc02
TEMPERATURE (°C)
QUIESCENT CURRENT (
VIN = 5V
VIN = 3V
IOUT = 0
OFF SUPPLY CURRENT
vs. TEMPERATURE
MAX1930 toc03
TEMPERATURE (°C)
OFF SUPPLY CURRENT (nA)
EN = IN
OUT = OPEN
20μs/div
MAX1930 toc10SWITCH TURN-ON TIME
VOUT, 5V/div
IOUT,
500mA/div
VEN, 5V/div
1μs/div
MAX1930 toc11SWITCH TURN-OFF TIME
VOUT, 5V/div
IOUT,
500mA/div
VEN, 5V/div
STARTUP TIME
(TYPICAL USB APPLICATION)
MAX1930 toc12
1ms/div
FULL CURRENT LIMIT CHARGES CAPACITOR
RESISTOR LOAD CURRENT
SHORT-CIRCUIT
CURRENT LIMIT
VOUT 5V/div
VEN 5V/div
IIN 1A/div
MAX1930
Current-Limited Switch for Two USB Ports
TURN-ON TIME vs. TEMPERATURE
MAX1930 toc07
TEMPERATURE (°C)
TURN-ON TIME (
IOUT = 850mA
COUT = 0.1μF
VIN = 3V
VIN = 5V
TURN-OFF TIME vs. TEMPERATURE
MAX1930 toc08
TEMPERATURE (°C)
TURN-OFF TIME (
IOUT = 850mA
COUT = 0.1μF
VIN = 3V
VIN = 5V
4μs/div
MAX1930 toc09CURRENT-LIMIT RESPONSE
VIN AC-COUPLED
500mV/div
VOUT, 5V/div
IOUT, 2A/div
OFF SWITCH CURRENT
vs. TEMPERATURE
MAX1930 toc04
TEMPERATURE (°C)
OFF SWITCH CURRENT (nA)
EN = IN
VOUT = 0
NORMALIZED ON-RESISTANCE
vs. TEMPERATURE
MAX1930 toc05
TEMPERATURE (°C)
NORMALIZED R60
IOUT = 850mA
NORMALIZED OUTPUT CURRENT
vs. OUTPUT VOLTAGE
MAX1930 toc06
OUTPUT VOLTAGE (V)
NORMALIZED OUTPUT CURRENT
SHORT-CIRCUIT CURRENT
ILIMIT(1.75A)
Typical Operating Characteristics (continued)
(Circuit of Figure 2, VIN= 5V, TA = +25°C, unless otherwise noted.)
MAX1930
Current-Limited Switch for Two USB Ports
Detailed Description
The MAX1930 P-channel MOSFET power switch limits
output current to 1.2A (min) and 2.3A (max). When the
outputcurrent increases beyond the current limit
(ILIMIT),the current also increases through the replica
switch (IOUT/ 13,000). The current-limit error amplifier
compares the voltage to the internal 1.24V reference
and regulates the current back to the ILIMIT(Figure 1).
These switches are not bidirectional. As a result, the
input voltage must be higher than the output voltage.
Continuous Short-Circuit Protection
The MAX1930 is a short-circuit protected switch. In the
event of an output short-circuit condition, the current
through the switch is foldback-current-limited to 1A
continuous.
Thermal Shutdown
The MAX1930 has a thermal shutdown feature. The
switch turns off when the junction temperature exceeds
+165°C. When the MAX1930 cools 20°C, the switch
turns back on. If the fault short-circuit condition is not
removed, the switch cycles on and off, resulting in a
pulsed output.
Applications Information
Input Capacitor
To limit the input voltage drop during momentary output
short-circuit conditions, connect a capacitor from IN to
GND. A 1µF ceramic capacitor is adequate for most
applications; however, higher capacitor values further
reduce the voltage drop at the input (Figure 2).
Output Capacitor
Connect a 0.1µF capacitor from OUT to GND. This
capacitor helps to prevent inductive parasitics from
pulling OUT negative during turn-off.
Layout and Thermal Dissipation
It is important to optimize the switch response time to
output short-circuit conditions by keeping all traces as
short as possible to reduce the effect of undesirable
parasitic inductance. Place input and output capacitors
as close as possible to the device (no more than 5mm
away). All IN and OUT pins must be connected with
short traces to the power bus. Wide power-bus planes
provide superior heat dissipation through the
MAX1930’s IN and OUT pins.
Under normal operating conditions, the package can
dissipate and channel heat away. Calculate the maxi-
mum power dissipation as follows:
P = (ILIMIT)2✕RON
where ILIMITis the preset current limit (2.3A max) and
RONis the on-resistance of the switch (125mΩmax).
When the output is short circuited, foldback-current-lim-
iting activates and the voltage drop across the switch
equals the input supply voltage. The power dissipated
across the switch increases, as does the die tempera-
Pin Description
MAX1930
OUT
GND
1.24VCURRENT-LIMIT
AMPLIFIER
REPLICA
AMPLIFIER
Figure 1. Functional Diagram
PINNAMEFUNCTIONGNDGround
2, 3INInput. P-channel MOSFET source—connect all IN pins together and bypass with a 1µF capacitor to ground.ENActive-Low Switch Enable Input. A logic low turns on the switch.OUTNCNo Connection. This pin is not internally connected and can be connected to OUT.
6, 7, 8OUTSwitch Output. P-channel MOSFET drain—connect all OUT pins together and bypass with a 0.1µF capacitor
to ground.
MAX1930
Current-Limited Switch for Two USB Ports
ture. If the fault condition is not removed, the thermal-
overload protection circuitry activates (see the Thermal
Shutdownsection). Wide power-bus planes connected
to IN and OUT and a ground plane in contact with the
device help dissipate additional heat.
Driving Inductive Loads
A wide variety of devices (mice, keyboards, cameras,
and printers) can load the USB port. These devices com-
monly connect to the port with cables, which can add an
inductive component to the load. This inductance caus-
es the output voltage at the USB port to ring during a
load step. The MAX1930 is capable of driving inductive
loads, but avoid exceeding the device’s absolute maxi-
mum ratings. Usually the load inductance is relatively
small, and the MAX1930’s input includes a substantial
bulk capacitance from an upstream regulator, as well as
local bypass capacitors, limiting overshoot. If severe
ringing occurs due to large load inductance, clamp the
MAX1930 output below 6V and above -0.3V.
Figure 2. Typical Application Circuit
MAX1930OUTPUTOUTINPUT
1μF0.1μF*
*USB SPECIFICATIONS REQUIRE
A HIGHER VALUE CAPACITOR.
OVERCURRENT
OUTPUT
OFF
GND
Chip Information
TRANSISTOR COUNT: 715
PROCESS: BiCMOS

Partno	Mfg	Dc	Qty	Available	Descript
MAX1930ESA+	MAXIM	N/a	197	avai	Current-Limited Switch for Two USB Ports