19-3463; Rev 0; 11/04
IT
TION K
VALUA
E
BLE
AVAILA
Triple 1.2A USB Switch in 4mm x 4mm
Thin QFN
General Description
Features
♦
Tiny 16-Pin 4mm x 4mm Thin QFN Package
♦
Reverse-Current Blocking
♦
Programmable Current Limit
♦
Auto-Restart when Fault Is Removed
♦
12% Accurate Current Limit
♦
Up to 1.2A Load Current for Each Output
♦
Thermal-Overload Protection
♦
Built-In 20ms Fault Blanking
♦
Compliant with All USB Specifications
♦
2.7V to 5.5V Input Supply Range
♦
Independent Fault Indicator Outputs
♦
Active-High/Active-Low Select Pin
♦
±15kV ESD Protection (with Caps)
♦
UL Listing Pending
MAX1564
The MAX1564 triple, current-limited USB switch comes
in a space-saving, 16-pin, 4mm x 4mm thin QFN pack-
age. Each channel meets all IEC specifications for USB
ports. The device is capable of supplying up to 1.2A
from each output. The MAX1564 has multiple protection
features, including thermal shutdown to limit junction
temperature in case of a prolonged short or overload
condition. Reverse-current protection circuitry blocks
current flow from output to input regardless of the
switch state. The IC has accurate, user-programmable
current-limiting circuitry to protect the input supply
against overload.
Each output of the MAX1564 has short-circuit protec-
tion that latches off the switch when the output is short-
ed for more than 20ms, thereby saving system power.
Auto-restart then tests the shorted output with a 25mA
current to determine when the short is removed, then
automatically restarts the output. Independent open-
drain fault signals notify the microprocessor that the
internal current limit has been reached. A 20ms fault-
blanking feature allows momentary faults to be ignored,
such as those caused when hot-swapping into a
capacitive load. This feature helps avoid issuing false
alarms to the host system. Blanking also suppresses
errant fault signals when the device is powering up.
Ordering Information
PART
MAX1564ETE
TEMP RANGE
-40°C to +85°C
PIN-PACKAGE
16 Thin QFN-EP*
4mm x 4mm
PKG
CODE
T1644-4
Applications
USB Ports
USB Hubs
Notebook Computers
Desktop Computers
Docking Stations
TOP VIEW
OUTC
9
OUTB
10
OUTA
GND
11
*EP
= Exposed pad.
Pin Configuration
12
FLTA 13
ONC 14
8
7
FLTC
FLTB
SETI
MAX1564
ONB 15
ONA 16
1
INA
2
V
CC
3
INB
4
INC
6
5
SEL
THIN QFN
4mm X 4mm
________________________________________________________________
Maxim Integrated Products
1
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.
Triple 1.2A USB Switch in 4mm x 4mm
Thin QFN
MAX1564
ABSOLUTE MAXIMUM RATINGS
IN_, ON_, OUT_, SEL, V
CC
to GND (Note 1)............-0.3V to +6V
FLT_,
SETI to GND .....................................-0.3V to (V
CC
+ 0.3V)
IN_ to OUT_ (when disabled, Note 2) .........................-6V to +6V
IN_ to OUT_ (when enabled, Note 3)....................-1.5A to +2.3A
FLT_
Sink Current................................................................20mA
Continuous Power Dissipation
16-Pin 4mm x 4mm Thin QFN
(derate 16.9mW/°C above +70°C) .............................1349mW
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
Note 1:
Note 2:
Note 3:
INA, INB, INC, and V
CC
must be connected together externally.
Reverse current (current from OUT_ to IN_) is blocked when disabled.
Forward and reverse current are internally limited.
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_
= V
CC
= V
SEL
= V
ON_
= 5V, R
SETI
= 26.1kΩ, T
A
= -40°C to +85°C, unless otherwise noted. Typical values are at T
A
= +25°C.)
(Note 4)
PARAMETER
Supply Voltage Range
V
IN_
= V
CC
= 5V, T
A
= +25°C
Switch On-Resistance
IN Standby Supply Current
V
IN_
= V
CC
= 3V, T
A
= +25°C
V
IN_
= V
CC
= 5V, T
A
= -40°C to +85°C
V
ON_
= 0V
V
ONA
= 5V,
V
ONB
= V
ONC
= 0V
IN Quiescent Supply Current
I
OUT_
= 0A
V
ONA
= V
ON0B
= 5V,
V
ONC
= 0V
V
ONA
= V
ONB
= V
ONC
= 5V
OUT_ Off-Leakage Current
Undervoltage-Lockout Threshold
Continuous Load Current
R
SETI
= 26.1kΩ
Current-Limit Threshold
R
SETI
= 39.2kΩ
R
SETI
= 60.4kΩ
Short-Circuit Current Limit
(Peak Amps)
R
SETI
= 26.1kΩ
V
OUT_
= 0V
R
SETI
= 39.2kΩ
R
SETI
= 60.4kΩ
Short-Circuit Current Limit
(RMS Amps)
Short-Circuit/Continuous Current-
Limit Transition Output Voltage
Threshold
R
SETI
= 26.1kΩ
V
OUT_
= 0V
R
SETI
= 39.2kΩ
R
SETI
= 60.4kΩ
(Note 5)
V
ON_
= 0V, V
OUT_
= 0V
V
IN_
rising, 3% hysteresis
2.2
1.2
1.20
0.79
0.49
1.46
1.37
0.91
0.59
1.8
1.2
0.77
0.55
0.37
0.23
1
V
A(RMS)
1.54
1.03
0.68
2.20
A
A
30
3
40
55
60
0.02
2.5
CONDITIONS
MIN
2.75
60
80
100
7.5
80
100
120
10
2.7
µA
V
A
µA
µA
mΩ
TYP
MAX
5.50
UNITS
V
2
_______________________________________________________________________________________
Triple 1.2A USB Switch in 4mm x 4mm
Thin QFN
ELECTRICAL CHARACTERISTICS (continued)
(V
IN_
= V
CC
= V
SEL
= V
ON_
= 5V, R
SETI
= 26.1kΩ, T
A
= -40°C to +85°C, unless otherwise noted. Typical values are at T
A
= +25°C.)
(Note 4)
PARAMETER
Current-Limit Fault-Blanking
Timeout Period
Turn-On Delay
Output Rise Time
Turn-Off Delay Time
Output Fall Time
Thermal Shutdown Threshold
Logic-Input High Voltage (ONA,
ONB, ONC, SEL)
Logic-Input Low Voltage (ONA,
ONB, ONC, SEL)
Logic-Input Current
FLT_
Output Low Voltage
FLT_
Output High Leakage
Current
SETI Output Voltage
SETI External Resistor Range
OUT_ Auto-Restart Current
OUT_ Auto-Restart Threshold
OUT_ Auto-Restart Delay Time
Reverse Current Detection
Threshold
Reverse Current Detection Blank
Time
10
I
SINK
= 1mA
V
FLT_
= 5.5V
600
26.1kΩ sets 1.37A maximum current limit
In latched-off state, V
OUT_
= 0V
In latched-off state, V
OUT_
rising
In latched-off state, V
OUT_
> 1V
26
10
0.4
10
25
0.5
20
0.9
20
40
60
50
0.6
40
CONDITIONS
From current-limit condition to
FLT_
low
R
OUT _
= 10Ω, C
OUT_
= 1µF,
measured from ON_ high to 10% of V
OUT_
R
OUT_
= 10Ω, C
OUT
_= 1µF, measured from 10% to 90%
of V
OUT_
R
OUT_
= 10Ω, C
OUT_
= 1µF, measured from ON_ low to
90% of V
OUT_
R
OUT_
= 10Ω, C
OUT_
= 1µF, measured from 90% to 10%
of V
OUT_
10°C hysteresis
V
IN_
= 2.7V to 4.0V
V
IN_
= 4.0V to 5.5V
V
IN_
= 2.7V to 4.0V
V
IN_
= 4.0V to 5.5V
-1
1.6
2.0
0.6
0.8
+1
0.4
1
MIN
10
0.5
TYP
20
1.5
3.5
100
4.0
+160
1000
MAX
40
4.0
UNITS
ms
ms
ms
µs
ms
°C
V
V
µA
V
µA
mV
kΩ
mA
V
ms
A
ms
MAX1564
Note 4:
Specifications to -40°C are guaranteed by design and characterization and not production tested.
Note 5:
The output voltage at which the device transitions from short-circuit current limit to continuous current limit.
_______________________________________________________________________________________
3
Triple 1.2A USB Switch in 4mm x 4mm
Thin QFN
MAX1564
Typical Operating Characteristics
(Circuit of Figure 1, V
INA
= V
INB
= V
INC
= V
SEL
= V
ONA
= V
ONB
= V
ONC
= 5V, T
A
= +25°C, unless otherwise noted.)
QUIESCENT SUPPLY CURRENT
vs. INPUT VOLTAGE
MAX1564 toc02
MAX1564 toc01
CURRENT LIMIT vs. R
SETI
1.6
1.4
1.2
CURRENT LIMIT (A)
1.0
0.8
0.6
0.4
0.2
0
26
36
46
R
SETI
(kΩ)
56
66
80
70
INPUT CURRENT (µA)
60
50
40
30
20
10
0
0
QUIESCENT SUPPLY CURRENT
vs. TEMPERATURE
V
IN
= 5.5V
70
INPUT CURRENT (µA)
60
50
40
30
20
V
IN
= 5V
V
IN
= 4.5V
MAX1564 toc03
80
1
2
3
4
5
6
-40
-15
10
35
60
85
INPUT VOLTAGE (V)
TEMPERATURE (°C)
STANDBY CURRENT vs. TEMPERATURE
3.5
INPUT CURRENT (µA)
3.0
2.5
2.0
1.5
1.0
0.5
0
-40
-15
10
35
60
85
TEMPERATURE (°C)
V
ONA
= V
ONB
= V
ONC
= 0V
0.001
-40
MAX1564 toc04
SWITCH OFF LEAKAGE CURRENT
vs. TEMPERATURE
MAX1564 toc05
REVERSE BLOCK LEAKAGE CURRENT
vs. OUTPUT VOLTAGE
MAX1564 toc06
4.0
10
100
LEAKAGE CURRENT (µA)
0.1
LEAKAGE CURRENT (µA)
V
ONA
= V
ONB
= V
ONC
= 0V
V
OUT
= 0V
-15
10
35
60
85
1
10
0.01
1
2.7
3.4
4.1
OUPUT VOLTAGE (V)
4.8
5.5
TEMPERATURE (°C)
NORMALIZED ON-RESISTANCE
vs. TEMPERATURE
MAX1564 toc07
CONTINUOUS CURRENT LIMIT
vs. TEMPERATURE
MAX1564 toc08
OUTPUT RISE TIME vs. TEMPERATURE
9
8
OUTPUT RISE TIME (ms)
7
6
5
4
3
2
1
0
V
IN
= 5V, NO LOAD
V
IN
= 5.5V, NO LOAD
V
IN
= 4.5V, NO LOAD
V
IN
= 5.5V, R
LOAD
= 5Ω
V
IN
= 5V, R
LOAD
= 5Ω
V
IN
= 4.5V, R
LOAD
= 5Ω
MAX1564 toc09
1.50
1.50
1.45
1.40
CURRENT LIMIT (A)
1.35
1.30
1.25
1.20
1.15
1.10
1.05
10
1.25
NORMALIZED R
ON
1.00
0.75
0.50
-40
-15
10
35
60
85
TEMPERATURE (°C)
1.00
-40
-15
10
35
60
85
TEMPERATURE (°C)
-40
-15
10
35
60
85
TEMPERATURE (°C)
4
________________________________________________________________________________________
Triple 1.2A USB Switch in 4mm x 4mm
Thin QFN
Typical Operating Characteristics (continued)
(Circuit of Figure 1, V
INA
= V
INB
= V
INC
= V
SEL
= V
ONA
= V
ONB
= V
ONC
= 5V, T
A
= +25°C, unless otherwise noted.)
MAX1564
OUTPUT FALL TIME vs. TEMPERATURE
MAX1564 toc10
FAULT-BLANKING TIME vs. TEMPERATURE
24
FAULT-BLANKING TIME (ms)
23
22
21
20
19
18
17
75
-40
-15
10
35
60
85
125
V
IN
= 4.5V
V
IN
= 5.5V
V
IN
= 5V
MAX1564 toc11
FLT_ LOW VOLTAGE vs. TEMPERATURE
MAX1564 toc12
4.0
3.8
OUTPUT FALL TIME (ms)
3.6
3.4
3.2
3.0
2.8
2.6
2.4
2.2
2.0
-40
-15
10
35
60
R
LOAD
= 5Ω
V
IN
= 5.5V
V
IN
= 5V
V
IN
= 4.5V
25
275
225
V
IN
= 5.5V
V
FLT_
(mV)
175
V
IN
= 5V
V
IN
= 4.5V
R
PULLUP
= 5kΩ
85
-40
-15
10
35
60
85
TEMPERATURE (°C)
TEMPERATURE (°C)
TEMPERATURE (°C)
AUTO-RESTART CURRENT vs. TEMPERATURE
MAX1564 toc13
AUTO-RESTART CURRENT vs. INPUT VOLTAGE
MAX1564 toc14
40
35
AUTO-RESTART CURRENT (mA)
30
25
20
15
10
5
0
-40
-15
10
35
60
V
IN
= 5V
V
IN
= 4.5V
V
IN
= 5.5V
28
AUTO-RESTART CURRENT (mA)
26
24
22
20
18
16
14
T
A
= +25°C
T
A
= -40°C
T
A
= +85°C
85
2.7
3.4
4.1
INPUT VOLTAGE (V)
4.8
5.5
TEMPERATURE (°C)
_______________________________________________________________________________________
5
电子竞赛
京公网安备 11010802033920号
Copyright © 2005-2026 EEWORLD.com.cn, Inc. All rights reserved
电子工程世界
