MAXIM MAX1564 User Manual

General Description

The MAX1564 triple, current-limited USB switch comes
in a space-saving, 16-pin, 4mm x 4mm thin QFN pack­age. 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 protec­tion that latches off the switch when the output is short­ed 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 open­drain fault signals notify the microprocessor that the
internal current limit has been reached. A 20ms fault­blanking 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.

Applications

USB Ports

USB Hubs

Notebook Computers

Desktop Computers

Docking Stations

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)

MAX1564

Triple 1.2A USB Switch in 4mm x 4mm

Thin QFN

________________________________________________________________

Maxim Integrated Products

1

Pin Configuration

Ordering Information

19-3463; Rev 1; 2/10

For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.

EVALUATION KIT

AVAILABLE

*

EP = Exposed pad.

PART TEMP RANGE PIN-PACKAGE

MAX1564ETE -40°C to +85°C

16 Thin QFN-EP*
4mm x 4mm

TOP VIEW

OUTA

GND

OUTB

OUTC

9101112

INC

8

FLTC

7

FLTB

SETI

6

SEL

5

13

FLTA

ONC

14

15

ONB

16

ONA

12 4

INA

MAX1564

3

CC

INB

V

THIN QFN

4mm X 4mm

MAX1564

Triple 1.2A USB Switch in 4mm x 4mm
Thin QFN

2 _______________________________________________________________________________________

ABSOLUTE MAXIMUM RATINGS

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_, OUT_, SEL, VCCto 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

ELECTRICAL CHARACTERISTICS

(V

IN_

= V

CC

= V

SEL

= V

ON_

= 5V, R

SETI

= 26.1kΩ, TA = -40°C to +85°C, unless otherwise noted. Typical values are at TA = +25°C.)

(Note 4)

Note 1: INA, INB, INC, and V

CC

must be connected together externally.

Note 2: Reverse current (current from OUT_ to IN_) is blocked when disabled.
Note 3: Forward and reverse current are internally limited.

PARAMETER CONDITIONS MIN TYP MAX UNITS

Supply Voltage Range 2.75 5.50 V

IN Standby Supply Current V

IN Quiescent Supply Current I

OUT_ Off-Leakage Current V

Undervoltage-Lockout Threshold V

Continuous Load Current 1.2 A

Current-Limit Threshold

Short-Circuit Current Limit
(Peak Amps)

Short-Circuit Current Limit
(RMS Amps)

Short-Circuit/Continuous Current­Limit Transition Output Voltage
Threshold

V

= VCC = 5V, TA = +25°C 60

IN_

V

= VCC = 3V, TA = +25°C 80Switch On-Resistance

IN_

= VCC = 5V, TA = -40°C to +85°C 30 100

V

IN_

= 0V 3 7.5 µA

ON_

= 0A

OUT_

= 0V, V

ON_

rising, 3% hysteresis 2.2 2.5 2.7 V

IN_

R

= 26.1kΩ 1.20 1.37 1.54

SETI

R

= 39.2kΩ 0.79 0.91 1.03

SETI

= 60.4kΩ 0.49 0.59 0.68

R

SETI

= 0V

V

OUT_

= 0V

V

OUT_

= 0V 0.02 10 µA

OUT_

(Note 5) 1 V

V

= 5V,

ONA

V

= V

ONB

V

= V

ONA

V

= 0V

ONC

= V

V

ONA

R

= 26.1kΩ 1.46 1.8 2.20

SETI

R

= 39.2kΩ 1.2

SETI

R

= 60.4kΩ 0.77

SETI

R

= 26.1kΩ 0.55

SETI

R

= 39.2kΩ 0.37

SETI

= 60.4kΩ 0.23

R

SETI

ONC

ON0B

ONB

= 0V

= 5V,

= V

= 5V 60 120

ONC

40 80

55 100

mΩ

µA

A

A

A(RMS)

MAX1564

Triple 1.2A USB Switch in 4mm x 4mm

Thin QFN

_______________________________________________________________________________________ 3

ELECTRICAL CHARACTERISTICS (continued)

(V

IN_

= V

CC

= V

SEL

= V

ON_

= 5V, R

SETI

= 26.1kΩ, TA = -40°C to +85°C, unless otherwise noted. Typical values are at TA = +25°C.)

(Note 4)

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.

Current-Limit Fault-Blanking
Timeout Period

Turn-On Delay

Output Rise Time

Turn-Off Delay Time

Output Fall Time

Thermal Shutdown Threshold 10°C hysteresis +160 °C

Logic-Input High Voltage (ONA,
ONB, ONC, SEL)

Logic-Input Low Voltage (ONA,
ONB, ONC, SEL)

Logic-Input Current -1 +1 µA

FLT_ Output Low Voltage I
FLT_ Output High Leakage

Current

SETI Output Voltage 600 mV

SETI External Resistor Range 26.1kΩ sets 1.37A maximum current limit 26 60 kΩ

OUT_ Auto-Restart Current In latched-off state, V

OUT_ Auto-Restart Threshold In latched-off state, V

OUT_ Auto-Restart Delay Time In latched-off state, V

Reverse Current Detection
Threshold

Reverse Current Detection Blank
Time

PARAMETER CONDITIONS MIN TYP MAX UNITS

From current-limit condition to FLT_ low 10 20 40 ms

= 10Ω, C

R

OUT _

measured from ON_ high to 10% of V

= 10Ω, C

R

OUT_

of V

OUT_

R

= 10Ω, C

OUT_

90% of V

R
of V

V

V

V

V

SINK

V

OUT_

= 10Ω, C

OUT_

OUT_

= 2.7V to 4.0V 1.6

IN_

= 4.0V to 5.5V 2.0

IN_

= 2.7V to 4.0V 0.6

IN_

= 4.0V to 5.5V 0.8

IN_

= 1mA 0.4 V

= 5.5V 1 µA

FLT_

= 1µF,

OUT_

OUT_

_= 1µF, measured from 10% to 90%

OUT

= 1µF, measured from ON_ low to

OUT_

= 1µF, measured from 90% to 10%

OUT_

= 0V 10 25 50 mA

OUT_

rising 0.4 0.5 0.6 V

OUT_

> 1V 10 20 40 ms

OUT_

0.5 1.5 4.0 ms

3.5 ms

100 1000 µs

4.0 ms

0.9 A

10 20 40 ms

V

V

MAX1564

Triple 1.2A USB Switch in 4mm x 4mm
Thin QFN

4 ________________________________________________________________________________________

Typical Operating Characteristics

(Circuit of Figure 1, V

INA

= V

INB

= V

INC

= V

SEL

= V

ONA

= V

ONB

= V

ONC

= 5V, TA = +25°C, unless otherwise noted.)

CURRENT LIMIT vs. R

SETI

MAX1564 toc01

R

SETI

(kΩ)

CURRENT LIMIT (A)

6636 46 56

0.2

0.4

0.6

0.8

1.0

1.2

1.4

1.6

0

26

QUIESCENT SUPPLY CURRENT

vs. INPUT VOLTAGE

MAX1564 toc02

INPUT VOLTAGE (V)

INPUT CURRENT (µA)

541 2 3

10

20

30

40

50

60

70

80

0

06

TEMPERATURE (°C)

603510-15

30

40

50

60

70

80

20

-40 85

QUIESCENT SUPPLY CURRENT

vs. TEMPERATURE

MAX1564 toc03

INPUT CURRENT (µA)

VIN = 5.5V

VIN = 4.5V

VIN = 5V

STANDBY CURRENT vs. TEMPERATURE

MAX1564 toc04

TEMPERATURE (°C)

INPUT CURRENT (µA)

6035-15 10

0.5

1.0

1.5

2.0

3.0

2.5

3.5

4.0

0

-40 85

V

ONA

= V

ONB

= V

ONC

= 0V

SWITCH OFF LEAKAGE CURRENT

vs. TEMPERATURE

MAX1564 toc05

TEMPERATURE (°C)

LEAKAGE CURRENT (µA)

603510-15

0.01

0.1

1

10

0.001

-40 85

V

ONA

= V

ONB

= V

ONC

= 0V

V

OUT

= 0V

REVERSE BLOCK LEAKAGE CURRENT

vs. OUTPUT VOLTAGE

MAX1564 toc06

OUPUT VOLTAGE (V)

LEAKAGE CURRENT (µA)

4.84.13.4

10

2.7

5.5

100

1

NORMALIZED ON-RESISTANCE

vs. TEMPERATURE

MAX1564 toc07

TEMPERATURE (°C)

NORMALIZED R

ON

603510-15

0.75

1.00

1.25

1.50

0.50

-40 85

CONTINUOUS CURRENT LIMIT

vs. TEMPERATURE

MAX1564 toc08

TEMPERATURE (°C)

CURRENT LIMIT (A)

603510-15

1.05

1.10

1.15

1.20

1.25

1.30

1.35

1.40

1.45

1.50

1.00

-40 85

OUTPUT RISE TIME vs. TEMPERATURE

OUTPUT RISE TIME (ms)

1

2

3

4

5

6

7

8

9

10

0

MAX1564 toc09

TEMPERATURE (°C)

603510-15-40 85

VIN = 5.5V, R

LOAD

= 5Ω

V

IN

= 5V, R

LOAD

= 5Ω

V

IN

= 4.5V, R

LOAD

= 5Ω



VIN = 5V, NO LOAD
V

IN

= 5.5V, NO LOAD

V

IN

= 4.5V, NO LOAD