Rainbow-electronics MAX1563 User Manual download pdf

General Description

The MAX1562/MAX1562H/MAX1563 single current-

limited 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 thermal-

overload protection turns off the switch when the die

temperature exceeds +160°C. Accurate internal cur-

rent-limiting circuitry protects the input supply against

both overload and short-circuit conditions. An open-

drain 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 pro-

grammed 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.

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

MAX1562

MAX1562H

MAX1563

FAULT

OUT

ISET

SEL

USB

PORT

GND

INPUT

4V TO 5.5V

MAX1563

ONLY

ACTIVE-HIGH/ACTIVE-LOW

SELECTABLE

Typical Operating Circuit

1 2 3 4 5 6 ... 11 12

Summary of Contents

Page 1 - MAX1562/MAX1562H/MAX1563

General DescriptionThe MAX1562/MAX1562H/MAX1563 single current-limited switches provide up to 4A to power up to eightUSB ports. They operate from a 4V

Page 2

MAX1562/MAX1562H/MAX1563Layout and Thermal DissipationKeep all traces as short as possible to reduce the effectof undesirable parasitic inductance and

Page 3

MAX1562/MAX1562H/MAX1563Programmable 4A USB Current-LimitedSwitches with Autoreset and Fault Blanking_________________________________________________

Page 4

MAX1562/MAX1562H/MAX1563Programmable 4A USB Current-LimitedSwitches with Autoreset and Fault BlankingMaxim cannot assume responsibility for use of any

Page 5

MAX1562/MAX1562H/MAX1563Programmable 4A USB Current-LimitedSwitches with Autoreset and Fault Blanking2 _______________________________________________

Page 6

MAX1562/MAX1562H/MAX1563Programmable 4A USB Current-LimitedSwitches with Autoreset and Fault Blanking_________________________________________________

Page 7

MAX1562/MAX1562H/MAX1563Programmable 4A USB Current-LimitedSwitches with Autoreset and Fault Blanking4 _______________________________________________

Page 8

MAX1562/MAX1562H/MAX1563Programmable 4A USB Current-LimitedSwitches with Autoreset and Fault Blanking_________________________________________________

Page 9

MAX1562/MAX1562H/MAX1563Programmable 4A USB Current-LimitedSwitches with Autoreset and Fault Blanking6 _______________________________________________

Page 10

Detailed DescriptionThe MAX1562/MAX1562H/MAX1563 family comprises aprogrammable current-limited switch designed for USBand hot-swap applications. The

Page 11

MAX1562/MAX1562H/MAX1563For the MAX1563, the minimum RISETvalue is 4.22kΩ,corresponding to a 4A current limit. Set the continuouscurrent-limit value 2

Page 12 - SIDE VIEW

Applications InformationInput Power Supply and CapacitanceConnect both IN inputs together externally. IN powersthe internal control circuitry and char

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Rainbow-electronics MAX1563 User Manual

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Summary of Contents

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