Rainbow Electronics MAX1563 User Manual
General Description
The MAX1562/MAX1562H/MAX1563 single currentlimited switches provide up to 4A to power up to eight
USB ports. They operate from a 4V to 5.5V input
supply and consume only 40µA of quiescent current
when operating and only 3µA in shutdown.
The MAX1562/MAX1562H/MAX1563s’ autoreset feature
latches the switch off if the output is shorted, thereby
saving system power. When the short is removed, the
switch is reactivated. A fault-blanking feature enables the
circuit to ignore momentary faults, such as those caused
when hot swapping a capacitive load, preventing false
alarms to the host system. Fault blanking also prevents
fault signals from being issued when the device powers
up the load.
The MAX1562/MAX1562H/MAX1563 provide several
safety features to protect the USB port. Built-in thermaloverload protection turns off the switch when the die
temperature exceeds +160°C. Accurate internal current-limiting circuitry protects the input supply against
both overload and short-circuit conditions. An opendrain fault signal (FAULT) notifies the microprocessor
when a thermal-overload, current-limit, undervoltage
lockout (UVLO), or short-circuit fault occurs.
The MAX1562 has an active-low ON, and the
MAX1562H has an active-high ON enable input. The
MAX1563 has a selectable active-high or active-low
logic-controlled enable. The current limit is programmed from 1A to 4A using a resistor.
The MAX1562/MAX1562H are available in 8-pin SO
packages and are pin-compatible upgrades to the
MIC2545A/MIC2549A. The MAX1563 provides the
same features and higher current performance in a
smaller 12-pin (4mm x 4mm) QFN package. These
devices operate over an extended temperature range
(-40°C to +85°C). An evaluation kit is available to speed
designs.
Applications
Notebook Computers
Desktop Computers
USB Ports and Hubs
PDAs and Palmtop Computers
Docking Stations
Features
♦ Programmable Current Limit (1A to 4A) with
Resistor
♦ Autoreset Feature Saves System Power
♦ 20ms Fault-Blanking Circuitry
♦ Active-High/Low Control Logic
♦ Fault-Indicator Output
♦ Thermal-Overload Protection
♦ Smaller 4mm x 4mm QFN Package (MAX1563)
♦ 3µA Shutdown Current
♦ UL Certification Pending
MAX1562/MAX1562H/MAX1563
Programmable 4A USB Current-Limited
Switches with Autoreset and Fault Blanking
________________________________________________________________ Maxim Integrated Products 1
Ordering Information
19-2631; Rev 0; 7/03
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.
EVALUATION KIT
AVAILABLE
Pin Configurations appear at end of data sheet.
Typical Operating Circuit
PART TEMP RANGE PIN-PACKAGE
MAX1562ESA -40°C to +85°C 8 SO
MAX1562HESA -40°C to +85°C 8 SO
MAX1563ETC -40°C to +85°C 12 QFN 4mm x 4mm
IN
GND
FAULT
OUT
OUT
USB
PORT
INPUT
4V TO 5.5V
ACTIVE-HIGH/ACTIVE-LOW
SELECTABLE
IN
ON
SEL
ISET
MAX1562
MAX1562H
MAX1563
MAX1563
ONLY
MAX1562/MAX1562H/MAX1563
Programmable 4A USB Current-Limited
Switches with Autoreset and Fault Blanking
2 _______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS
(VIN= +5V, CIN= 1µF, C
OUT
= 4.7µF, 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, ISET, SEL, OUT to GND .......................-0.3V to +6V
FAULT to GND.............................................-0.3V to (V
IN
+ 0.3V)
IN to OUT..................................................................-0.3V to +6V
OUT Maximum Continuous Switch Current ............................5A
FAULT DC Current ..............................................................10mA
Continuous Power Dissipation
8-Pin SO (derate 5.9mW/°C above +70°C)..................471mW
12-Pin QFN (4mm x 4mm)
(derate 16.9mW/°C above +70°C).............................1350mW
Operating Temperature Range ...........................-40°C to +85°C
Junction Temperature......................................................+150°C
Storage Temperature Range .............................-65°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C
PARAMETER SYM B O L CONDITIONS MIN TYP MAX UNITS
Supply Voltage Range V
Switch On-Resistance R
Standby Supply Current Switch disabled 3 10 µA
Quiescent Supply Current I
OUT Off-Leakage Current I
Undervoltage-Lockout Threshold V
Continuous Current-Limit Adjust
Range
Continuous Current Limit I
Short-Circuit Current Limit I
Short-Circuit Detect Threshold (Note 1) 1 V
Continuous Current-Limit
Blanking Timeout Period
Short-Circuit Blanking Timeout
Period
Turn-On Delay t
Output Rise Time t
Turn-Off Delay t
IN
ON
Switch enabled, I
IN
LKG
UVLO
Switch disabled, V
Rising edge, 3% hysteresis 2.9 3.4 3.8 V
MAX1563 1 4
MAX1562/MAX1562H 1 3
R
ISET
R
LIM
LIM
VIN - V
= 0.5V
V
OUT
I
OUT
OUT
= 0,
pulsing
R
R
R
R
R
ISET
ISET
ISET
ISET
ISET
ISET
From continuous current-limit condition to
FAULT asserted
From short-circuit current-limit condition to
FAULT asserted
R
= 2Ω, C
ON
RISE
OFF
OUT
(from ON to 10% of V
R
OUT
(from 10% to 90% of V
R
OUT
(from ON to 90% of V
= 2Ω, C
= 2Ω, C
OUT
OUT
OUT
4.0 5.5 V
26 50 mΩ
= 0 40 80 µA
OUT
= 0 0.02 10 µA
OUT
= 4.22kΩ (MAX1563 only) 3.2 4 4.8
= 5.76kΩ 2.4 3 3.6
= 8kΩ 1.7 2.1 2.6
= 12kΩ 1.1 1.4 1.7
= 4.22kΩ (MAX1563 only)
= 5.76kΩ
= 12kΩ
2.5 3.6 4.7 A(peak)
1.2 1.7 2.3 A(peak)
4.9 A(peak)
1.6 A(RMS)
1.4 A(RMS)
0.4 A(RMS)
10 20 35 ms
7.5 18 35 ms
= 4.7µF
OUT
= 4.7µF
OUT
= 4.7µF
OUT
)
)
)
0.5 1.2 4.0 ms
2.5 ms
0.1 3 ms
A
A
MAX1562/MAX1562H/MAX1563
Programmable 4A USB Current-Limited
Switches with Autoreset and Fault Blanking
_______________________________________________________________________________________ 3
ELECTRICAL CHARACTERISTICS (continued)
(VIN= +5V, CIN= 1µF, C
OUT
= 4.7µF, TA= 0°C to +85°C, unless otherwise noted. Typical values are at TA= +25°C.)
ELECTRICAL CHARACTERISTICS
(VIN= +5V, CIN= 1µF, C
OUT
= 4.7µF, TA= -40°C to +85°C, unless otherwise noted.) (Note 2)
Output Fall Time t
Thermal-Shutdown Threshold 15°C hysteresis +160 °C
ON, ON, SEL Input High Level V
ON, ON, SEL Input Low Level V
ON, ON, SEL Input
Leakage Current
FAULT Output Low Voltage V
FAULT Output
High Leakage Current
OUT Autoreset Current In latched-off state, V
OUT Autoreset Threshold In latched-off state, OUT rising 0.35 0.5 0.65 V
OUT Autoreset Blanking Time In latched-off state, V
PARAMETER SYM B O L CONDITIONS MIN TYP MAX UNITS
R
FALL
IH
IL
OL
= 2Ω, C
OUT
(from 90% to10% of V
VIN = +4V to +5.5V 2 V
VIN = +4V to +5.5V 0.8 V
I
= 1mA, VIN = +4V 0.4 V
SINK
V
= V
IN
FAULT
= 4.7µF
OUT
= +5.5V 1 µA
)
OUT
-1 +1 µA
= 0 10 25 45 mA
OUT
> 0.5V 10 20 35 ms
OUT
0.8 ms
Supply Voltage Range V
Switch On-Resistance R
Standby Supply Current Switch disabled 10 µA
Quiescent Supply Current I
OUT Off-Leakage Current I
UVLO Threshold V
Continuous Current-Limit Adjust
Range
Continuous Current Limit I
Short-Circuit Current Limit I
Continuous Current-Limit
Blanking Timeout Period
Short-Circuit Blanking Timeout
Period
PARAMETER SYM B O L CONDITIONS MIN TYP MAX UNITS
IN
ON
IN
LKG
UVLO
LIM
LIM
Switch enabled, I
Switch disabled, V
Rising edge, 3% hysteresis 2.9 3.8 V
MAX1563 1 4
MAX1562/MAX1562H 1 3
VIN - V
OUT
= 0.5V
V
= 0,
OUT
pulsing
I
OUT
From continuous current-limit condition to
FAULT asserted
From short-circuit current-limit condition to
FAULT asserted
= 0 80 µA
OUT
= 0 10 µA
OUT
R
= 4.22kΩ (MAX1563 only) 3.1 4.9
ISET
R
= 5.76kΩ 2.3 3.7
ISET
R
= 8kΩ 1.6 2.7
ISET
R
= 12kΩ 1.0 1.8
ISET
R
= 5.76kΩ 2.4 4.8
ISET
R
= 12kΩ 1.1 2.4
ISET
4.0 5.5 V
50 mΩ
A(peak)
10 35 ms
7.5 35 ms
A
A
MAX1562/MAX1562H/MAX1563
Programmable 4A USB Current-Limited
Switches with Autoreset and Fault Blanking
4 _______________________________________________________________________________________
ELECTRICAL CHARACTERISTICS (continued)
(VIN= +5V, CIN= 1µF, C
OUT
= 4.7µF, TA= -40°C to +85°C, unless otherwise noted.) (Note 2)
Note 1: Short-circuit detect threshold is the output voltage at which the device transitions from short-circuit current limit to continuous
current limit.
Note 2: Specifications to -40°C are guaranteed by design, not production tested.
SUPPLY CURRENT vs. SUPPLY VOLTAGE
MAX1562 toc01
SUPPLY VOLTAGE (V)
SUPPLY CURRENT (µA)
5.04.54.03.5
5
10
15
20
25
30
35
40
45
50
0
3.0 5.5
TEMP = +25°C
TEMP = -40°C
TEMP = +85°C
SHUTDOWN CURRENT
vs. SUPPLY VOLTAGE
MAX1562 toc02
SUPPLY VOLTAGE (V)
SHUTDOWN CURRENT (µA)
5.04.54.03.5
0.5
1.0
1.5
2.0
2.5
3.0
3.5
0
3.0 5.5
TEMP = +25°C
TEMP = -40°C
TEMP = +85°C
VON = 5V
SWITCH-OFF LEAKAGE CURRENT
vs. TEMPERATURE
MAX1562 toc03
TEMPERATURE (°C)
SWITCH-OFF LEAKAGE CURRENT (nA)
603510-15
0.01
0.1
1
10
100
1000
0.001
-40 85
Typical Operating Characteristics
(VIN= +5V, CIN= 1µF, C
OUT
= 4.7µF, TA= +25°C, unless otherwise noted.)
PARAMETER SYM B O L CONDITIONS MIN TYP MAX UNITS
Turn-On Delay t
Turn-Off Delay t
ON, ON, SEL Input High Level V
ON, ON, SEL Input Low Level V
ON, ON, SEL Input
Leakage Current
FAULT Output Low Voltage V
FAULT Output
High Leakage Current
OUT Autoreset Current In latched-off state, V
OUT Autoreset Threshold In latched-off state, OUT rising 0.35 0.65 V
OUT Autoreset Blanking Time In latched-off state, V
R
= 2Ω, C
ON
OFF
IH
IL
OLISINK
OUT
(from ON to 10% of V
R
= 2Ω, C
OUT
(from ON to 90% of V
VIN = +4V to +5.5V 2 V
VIN = +4V to +5.5V 0.8 V
= 1mA, VIN = +4V 0.4 V
= V
V
IN
FAULT
= 4.7µF
OUT
OUT
OUT
= 4.7µF
OUT
)
)
= +5.5V 1 µA
= 0 10 45 mA
OUT
> 0.5V 10 35 ms
OUT
0.5 4.0 ms
3ms
-1 +1 µA
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