MAXIM MAX1562, MAX1562H, 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) Thin 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

o Programmable Current Limit (1A to 4A) with

Resistor

o Autoreset Feature Saves System Power

o 20ms Fault-Blanking Circuitry

o Active-High/Low Control Logic

o Fault-Indicator Output

o Thermal-Overload Protection

o Smaller 4mm x 4mm Thin QFN Package (MAX1563)

o 3µA Shutdown Current

MAX1562/MAX1562H/MAX1563

Programmable 4A USB Current-Limited

Switches with Autoreset and Fault Blanking

________________________________________________________________

Maxim Integrated Products

1

Ordering Information

19-2631; Rev 2; 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

Pin Configurations appear at end of data sheet.

Typical Operating Circuit

+

Denotes a lead(Pb)-free/RoHS-compliant package.

*

EP = Exposed pad.

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 TQFN-EP*

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 Thin 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

RISE

OFF

Switch disabled, V

Rising edge, 3% hysteresis 2.9 3.4 3.8 V

MAX1563 1 4

MAX1562/MAX1562H 1 3

R

OUT

R

R

R

R

R

R

OUT

OUT

OUT

VIN - V

LIM

= 0.5V

V

= 0V,

LIM

ON

OUT

pulsing

I

OUT

From continuous current-limit condition to
FAULT asserted

From short-circuit current-limit condition to
FAULT asserted

R

= 2Ω, C

OUT

(from ON to 10% of V

R

= 2Ω, C

OUT

(from 10% to 90% of V

R

= 2Ω, C

OUT

(from ON to 90% of V

4.0 5.5 V

26 50 mΩ

= 0A 40 80 µA

OUT

= 0V 0.02 10 µA

OUT

= 4.22kΩ (MAX1563 only) 3.2 4 4.8

ISET

= 5.76kΩ 2.4 3 3.6

ISET

= 8kΩ 1.7 2.1 2.6

ISET

= 12kΩ 1.1 1.4 1.7

ISET

= 4.22kΩ (MAX1563 only)

ISET

= 5.76kΩ

ISET

= 12kΩ

ISET

= 4.7µF

)

OUT

= 4.7µF

)

OUT

= 4.7µF

)

OUT

2.5 3.6 4.7 A(peak)

1.2 1.7 2.3 A(peak)

10 20 35 ms

7.5 18 35 ms

0.5 1.2 4.0 ms

4.9 A(peak)

1.6 A(RMS)

1.4 A(RMS)

0.4 A(RMS)

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)

PARAMETER SYM B O L CONDITIONS MIN TYP MAX UNITS

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

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

FAULT

IN

= 4.7µF

OUT

= +5.5V 1 µA

)

OUT

-1 +1 µA

= 0V 10 25 45 mA

OUT

> 0.5V 10 20 35 ms

OUT

0.8 ms

PARAMETER SYM B O L CONDITIONS MIN TYP MAX UNITS

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

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

= 0V,

OUT

pulsing

I

OUT

From continuous current-limit condition to
FAULT asserted

From short-circuit current-limit condition to
FAULT asserted

= 0A 80 µA

OUT

= 0V 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

= 12kΩ 1.1 2.4

R

ISET

4.0 5.5 V

50 mΩ

10 35 ms

7.5 35 ms

A

A

A(peak)

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

= 0V 10 45 mA

OUT

> 0.5V 10 35 ms

OUT

0.5 4.0 ms

3ms

-1 +1 µA

MAX1562/MAX1562H/MAX1563

Programmable 4A USB Current-Limited

Switches with Autoreset and Fault Blanking

_______________________________________________________________________________________

5

Typical Operating Characteristics (continued)

(VIN= +5V, CIN= 1µF, C

OUT

= 4.7µF, TA= +25°C, unless otherwise noted.)

NORMALIZED RON vs. TEMPERATURE

1.3

1.2

ON

1.1

1.0

NORMALIZED R

0.9

0.8

0.7

-40 85
TEMPERATURE (°C)

TURN-OFF TIME vs. TEMPERATURE

(t

+ t

3.0
R

LOAD

2.5

2.0

1.5

1.0

TURN-OFF TIME (ms)

0.5

0

-40 85

OFF

= 2Ω

TEMPERATURE (°C)

NORMALIZED CONTINUOUS

CURRENT LIMIT vs. TEMPERATURE

1.03

1.02

MAX1562 toc04

1.01

1.00

0.99

0.98

0.97

NORMALIZED CONTINUOUS CURRENT LIMIT

0.96

-40 85

22.0

21.8

MAX1562 toc07

21.6

21.4

21.2

21.0

20.8

20.6

FAULT-BLANKING TIME (ms)

20.4

20.2

20.0

-40 85

TEMPERATURE (°C)

FAULT-BLANKING TIME

vs. TEMPERATURE

TEMPERATURE (°C)

FALL

603510-15

)

6035-15 10

TURN-ON TIME vs. TEMPERATURE

3.0

R

= 2Ω

LOAD

2.5

MAX1562 toc05

2.0

1.5

1.0

TURN-ON TIME (ms)

0.5

603510-15

0

-40 85
TEMPERATURE (°C)

603510-15

AUTORESET CURRENT

vs. TEMPERATURE

40

MAX1562 toc08

30

20

AUTORESET CURRENT (mA)

10

603510-15

0

-40 85
TEMPERATURE (°C)

603510-15

MAX1562 toc06

MAX1562 toc09

AUTORESET CURRENT vs. V

40

35

30

25

20

15

AUTORESET CURRENT (mA)

10

5

0

4.0 5.5
VCC (V)

CC

MAX1562 toc10

5.24.94.3 4.6

OVERLOAD RESPONSE INTO 1.4Ω

V

IN

V

OUT

FAULT

I

OUT

20ms/div

MAX1562 toc11

5V/div

5V/div

5V/div

2A/div

SHORT-CIRCUIT RESPONSE INTO 0

V

IN

V

OUT

V

FAULT

I

OUT

TIME (10ms/div)

MAX1562 toc12

Ω

5V/div

5V/div

5V/div

10A/div