Rainbow Electronics MAX1558H User Manual

General Description

The MAX1558/MAX1558H are dual, current-limited
switches with autoreset for USB applications. Autoreset
latches the switch off if it is shorted for more than 20ms,
saving system power. The shorted output is then tested
to determine when the short is removed to automatically
restart the channel. Each channel delivers up to 1.2A
and meets all IEC specifications for USB ports. Low
quiescent supply current (45µA) and standby current
(3µA) conserve battery power in portable applications.

The MAX1558/MAX1558H safety features ensure that the
USB port is protected. Built-in thermal-overload protection
limits power dissipation and junction temperature.
Accurate, programmable current-limiting circuitry pro­tects the input supply against both overload and short-cir­cuit conditions. 20ms fault blanking enables the circuit to
ignore transient faults, such as those caused when hot
swapping a capacitive load, preventing false alarms to
the host system. The MAX1558/MAX1558H also feature
reverse-current protection circuitry to block current flow
from the output to the input when the switches are off.

The MAX1558/MAX1558H are available in space-sav­ing 3mm x 3mm, 10-pin TDFN packages. The MAX1558
is enabled with an active-low signal, and the
MAX1558H is enabled with an active-high signal.

Applications

USB Ports and Hubs
Notebook Computers and Desktops
PDAs and Palmtop Computers
Docking Stations

Features

♦ 55mΩ Switch Resistance
♦ Tiny 10-Pin, 3mm x 3mm TDFN Package
♦ 14% Accurate Current Limit
♦ Autorestart when Fault is Removed
♦ Programmable Current Up to 1.2A
♦ Thermal-Overload Protection
♦ Built-In 20ms Fault Blanking
♦ Compliant to All USB Specifications
♦ 2.7V to 5.5V Supply Range
♦ Independent-Output Fault Indicators
♦ Block Reverse Current when Disabled
♦ 15kV ESD Protection (with Capacitor)
♦ UL Listing Pending

MAX1558/MAX1558H

Dual, 3mm x 3mm, 1.2A/Programmable-Current

USB Switches with Autoreset

________________________________________________________________ Maxim Integrated Products 1

Ordering Information

19-3128; Rev 0; 6/04

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.

PART

TEMP RANGE

PIN­PACKAGE

TOP

MARK

MAX1558ETB

10 TDFN

AAR

MAX1558HETB

10 TDFN

AAS

MAX1558

INPUT

2.7V TO 5.5V

INA
INB

ISET

FLTA

FLTB

ONA
ONB

ONA
ONB

OUTA

OUTB

GND

USB
PORT A

USB
PORT B

Typical Operating Circuit

2
3

9
8

TDFN

3mm x 3mm

TOP VIEW

4

5

7
6

1

MAX1558

(MAX1558H)

10

ISET

INA

INB

ONA (ONA)

ONB (ONB)

OUTA

GND

OUTB

FLTA

FLTB

Pin Configuration

-40°C to +85°C
(3mm x 3mm)

-40°C to +85°C
(3mm x 3mm)

MAX1558/MAX1558H

Dual, 3mm x 3mm, 1.2A/Programmable-Current
USB Switches with Autoreset

2 _______________________________________________________________________________________

ABSOLUTE MAXIMUM RATINGS

ELECTRICAL CHARACTERISTICS

(V

INA

= V

INB

= 5V, V

ONA

= V

ONB

= 0V (MAX1558), V

ONA

= V

ONB

= 5V (MAX1558H), R

ISET

= 26kΩ to GND, TA= 0°C to +85°C,

unless otherwise noted. Typical values are at T

A

= +25°C.) (Note 3)

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_, ISET, FLT_ to GND........................-0.3V to +6V

IN_ to OUT_ (when disabled) (Note 1)........................-6V to +6V

IN_ to OUT_ (when enabled) (Note 2)............-1.6A to +1.6A

RMS

FLT_ Sink Current................................................................20mA

Continuous Power Dissipation (T

A

= +70°C)
10-Pin TDFN 3mm x 3mm

(derate 24.4mW/°C above +70°C).............................1952mW

Operating Temperature Range ...........................-40°C to +85°C

Junction Temperature......................................................+160°C

Storage Temperature Range.............................-65°C to +150°C

Lead Temperature (soldering, 10s).................................+300°C

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

Supply Voltage Range

V

V

IN_

= 5V, TA = +25°C5575

V

IN_

= 3.3V, TA = +25°C64Switch On-Resistance R

ON

V

IN_

= 4.4V, TA = 0°C to +85°C 105

mΩ

Standby Supply Current Both switches disabled 3 6 µA
Quiescent Supply Current Both switches enabled 45 75 µA

V

OUTA

= V

OUTB

= 0V

10

OUT_ Off-Leakage Current

V

OUTA

= V

OUTB

= 5V

µA

Reverse Leakage Current

V

IN_

= 0V, V

OUTA

= V

OUTB

= 5V, both

switches disabled

µA

V

UVLO

Rising edge, 3% hysteresis 2.3 2.5 2.7 V

Continuous Load Current R

ISET

= 26kΩ 1.2 A

R

ISET

= 26kΩ

1.4

R

ISET

= 39kΩ

Current-Limit Threshold

V

IN_

- V

OUT_

=

0.5V
R

ISET

= 60kΩ

0.6

A

R

ISET

= 26kΩ

2.0

R

ISET

= 39kΩ

Peak Short-Circuit Current Limit I

SHORT

V

OUT_

= 0V

(I

OUT_

pulsing)

R

ISET

= 60kΩ

A

(PEAK)

R

ISET

= 26kΩ

R

ISET

= 39kΩ

RMS Short-Circuit Current Limit I

SHORT

V

OUT_

= 0V

(I

OUT_

pulsing)

R

ISET

= 60kΩ

A

RMS

Short-Circuit Continuous Current­Limit Transition Threshold

(Note 4) 1 V

Fault-Blanking Timeout Period From I

LIMIT

condition to 50% of V

FLT_

82040ms

Turn-On Delay t

ON

R

OUT_

= 10Ω, C

OUT_

= 1µF, does not

include rise time (from ON asserted to
V

OUT_

= 10% V

IN_

)

0.5 1.4 4.0 ms

Note 1: Reverse current (current from OUT_ to IN_) is blocked when disabled.
Note 2: Forward current (current from IN_ to OUT_) is internally limited. Reverse current, from OUT_ to IN_, is not limited when the

device is enabled and must be kept below 1.5A

RMS

to prevent permanent device damage. When the MAX1558/MAX1558H

are disabled, the switch turns off and reverse current is internally blocked.

Undervoltage-Lockout Threshold

Switches disabled

2.75 5.50

0.03

0.03

0.03

1.20

0.80 0.925 1.05

0.50

1.45

1.40

0.90

0.55

0.37

0.23

1.60

0.70

2.60

MAX1558/MAX1558H

Dual, 3mm x 3mm, 1.2A/Programmable-Current

USB Switches with Autoreset

_______________________________________________________________________________________ 3

ELECTRICAL CHARACTERISTICS (continued)

(V

INA

= V

INB

= 5V, V

ONA

= V

ONB

= 0V (MAX1558), V

ONA

= V

ONB

= 5V (MAX1558H), R

ISET

= 26kΩ to GND, TA= 0°C to +85°C,

unless otherwise noted. Typical values are at T

A

= +25°C.) (Note 3)

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

Output Rise Time t

RISE

C

OUT_

= 1µF, R

OUT_

= 10Ω, (from 10% to

90% of V

OUT_

)

4ms

Turn-Off Delay from ON t

OFF

R

OUT_

= 10Ω, C

OUT_

= 1µF, does not

include rise time (from ON deasserted to
V

OUT_

= 90% V

IN_

)

µs

Output Fall Time t

FALL

C

OUT_

= 1µF, R

OUT_

= 10Ω (from 90% to

10% of V

OUT_

)

3ms

Thermal-Shutdown Threshold 10°C hysteresis

°C

V

IN_

= 2.7V to 4.0V 1.6

ONA/ONB Logic Input High
Voltage

V

IH

V

IN_

4.0V to 5.5V 2.0

V

V

IN_

= 2.7V to 4.0V 0.6

ONA/ONB Logic Input Low
Voltage

V

IL

V

IN_

= 4.0V to 5.5V 0.8

V

Logic Input Current V

ON_

= 0V or V

IN_

-1 +1 µA

FLT_ Output Low Voltage I

SINK

= 1mA 0.4 V

FLT_ Output High Leakage
Current

V

IN_

= V

FLT_

= 5.5V 1 µA

Autorestart Current In latched-off state, V

OUT_

= 0V 10 25 50 mA
Autorestart Threshold In latched-off state, rising 0.4 0.5 0.6 V
Autorestart Delay In latched-off state, V

OUT_

> 1V 8 20 40 ms

ELECTRICAL CHARACTERISTICS

(V

INA

= V

INB

= 5V, V

ONA

= V

ONB

= 0V (MAX1558), V

ONA

= V

ONB

= 5V (MAX1558H), R

ISET

= 26kΩ to GND, TA= -40°C to +85°C,

unless otherwise noted.)

PARAMETER

CONDITIONS

UNITS

Supply Voltage Range 2.7 5.5 V

V

IN_

= 5V, TA = +25°C75

Switch On-Resistance R

ON

V

IN_

= 4.4V, TA = 0°C to +85°C 105

mΩ

Standby Supply Current Both switches disabled 6 µA
Quiescent Supply Current Both switches enabled 75 µA
OUT_ Off-Leakage Current Switches disabled, V

OUTA

= V

OUTB

= 0V 10 µA

Undervoltage-Lockout Threshold

V

UVLO

Rising edge, 3% hysteresis 2.3 2.7 V

Continuous Load Current R

ISET

= 26kΩ 1.2 A

R

ISET

= 26kΩ

R

ISET

= 39kΩ

Current-Limit Threshold

R

ISET

= 60kΩ

A

Peak Short-Circuit Current Limit I

SHORT

V

OUT_

= 0V

(I

OUT_

pulsing)

R

ISET

= 26kΩ

A

(PEAK)

Fault-Blanking Timeout Period From I

LIMIT

condition to 50% of V

FLT_

840ms

100 1000

+160

SYMBOL

MIN TYP MAX

V

IN_

- V

OUT_

= 0.5V

1.20 1.60

0.80 1.05

0.50 0.70

1.45 2.60

Typical Operating Characteristics

(V

INA

= V

INB

= 5V, V

ONA

= V

ONB

= 0V (MAX1558), V

ONA

= V

ONB

= 5V (MAX1558H), R

ISET

= 26kΩ to GND. Typical values are at TA=

+25°C, unless otherwise noted.)

MAX1558/MAX1558H

Dual, 3mm x 3mm, 1.2A/Programmable-Current
USB Switches with Autoreset

4 _______________________________________________________________________________________

ELECTRICAL CHARACTERISTICS (continued)

(V

INA

= V

INB

= 5V, V

ONA

= V

ONB

= 0V (MAX1558), V

ONA

= V

ONB

= 5V (MAX1558H), R

ISET

= 26kΩ to GND, TA= -40°C to +85°C,

unless otherwise noted.)

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

Turn-On Delay t

ON

R

OUT_

= 10Ω, C

OUT_

= 1µF, does not
include rise time (from ON asserted to
V

OUT_

= 10% V

IN_

)

0.5 4.0 ms

Turn-Off Delay from ON t

OFF

R

OUT_

= 10Ω, C

OUT_

= 1µF, does not
include rise time (from ON deasserted to
V

OUT_

= 90% V

IN_

)

µs

V

IN_

= 2.7V to 4.0V 1.6

ONA/ONB Logic Input High
Voltage

V

IH

V

IN_

= 4.0V to 5.5V 2.0

V

V

IN_

= 2.7V to 4.0V 0.6

ONA/ONB Logic Input Low
Voltage

V

IL

V

IN_

= 4.0V to 5.5V 0.8

V

Logic Input Current V

ON_

= 0V or V

IN_

-1 +1 µA

FLT_ Output Low Voltage I

SINK

= 1mA 0.4 V

FLT_ Output High Leakage
Current

V

IN_

= V

FLT_

= 5.5V 1 µA

Autorestart Current In latched-off state, V

OUT_

= 0V 10 50 mA
Autorestart Threshold In latched-off state, rising 0.4 0.6 V
Autorestart Delay In latched-off state, V

OUT_

> 1V 8 40 ms

Note 3: Specifications from 0°C to -40°C are guaranteed by design but not 100% tested.
Note 4: The output voltage at which the device transitions from short-circuit current limit to continuous current limit. See the

Output-

Current Fault Protection section.

CURRENT-LIMIT PROGRAM vs. R

ISET

MAX1558/58H toc01

R

ISET

(kΩ)

CURRENT LIMIT (A)

40 48 52 564428 3632

1.5

1.4

1.3

1.2

1.1

1.0

0.9

0.8

0.7

0.6

1.6

0.5
24 60

QUIESCENT SUPPLY CURRENT

vs. SUPPLY VOLTAGE

MAX1558/58H toc02

SUPPLY VOLTAGE (V)

QUIESCENT CURRENT (µA)

54321

10

20

30

40

50

60

0

06

QUIESCENT CURRENT vs. TEMPERATURE

MAX1558/58H toc03

TEMPERATURE (°C)

QUIESCENT CURRENT (µA)

603510-15

35

40

45

50

30

-40 85

V

IN_

= 5.5V

V

IN_

= 4.5V

V

IN_

= 5V

1000