MAX1931EUB+ Maxim Integrated Products, MAX1931EUB+ Datasheet

MAX1931EUB+

Manufacturer Part Number

MAX1931EUB+

Description

IC SW CUR LIMIT USB 10-UMAX

Manufacturer

Maxim Integrated Products

Datasheet

1.MAX1931EUB.pdf (8 pages)

Specifications of MAX1931EUB+

Applications

USB, Peripherals

Current - Supply

14µA

Voltage - Supply

2.7 V ~ 5.5 V

Operating Temperature

-40°C ~ 85°C

Mounting Type

Surface Mount

Package / Case

10-MSOP, Micro10™, 10-uMAX, 10-uSOP

Maximum Operating Temperature

+ 85 C

Minimum Operating Temperature

- 40 C

Mounting Style

SMD/SMT

Lead Free Status / RoHS Status

Lead free / RoHS Compliant

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The MAX1931 is a current-limited, 60mΩ switch with

built-in fault blanking. Its accurate preset current limit of

0.64A to 1.06A makes it ideally suited for USB applica-

tions. The device’s low quiescent supply current (14µA)

and shutdown current (1µA) conserve battery power in

portable applications. The MAX1931 operates with

inputs from 2.7V to 5.5V, making it ideal for both 3V and

5V systems.

A fault signal notifies the microprocessor that the inter-

nal current limit has been reached. A 10ms fault-blank-

ing feature allows momentary faults (such as those

caused when hot-swapping into a capacitive load) to be

ignored, thus preventing false alarms to the host system.

This fault blanking also prevents a fault signal from

being issued when the device is powering up.

In the MAX1931, an output overcurrent condition causes

the switch to current limit at 0.64A to 1.06A and FAULT

to go low after the 10ms blanking period. When the

overcurrent condition is removed, FAULT returns to its

high-impedance state.

The MAX1931 has several safety features to ensure that

the USB port is protected. Built-in thermal overload

protection limits power dissipation and junction tempera-

tures. The device has an accurate internal current-limit-

ing circuitry to protect the input supply against overload.

The MAX1931 is available in a space-saving 10-pin

µMAX package.

19-2357; Rev 0; 4/02

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.

USB Ports and Hubs

Notebook Computers

Portable Equipment

Docking Stations

Hot Plug-In Power Supplies

Battery-Charger Circuits

Current-Limited Switch for Single USB Port

_______________________________________________________________ Maxim Integrated Products

General Description

Applications

o 0.5A Guaranteed Output Current

o Guaranteed 0.75A Short-Circuit Protection

o 10ms Internal Fault-Blanking Timeout

o No Fault Signal During Power-Up

o Thermal Shutdown Protection

o 2.7V to 5.5V Supply Range

o 14µA Supply Current

o Small 10-Pin µMAX Package

MAX1931EUB

TOP VIEW

2.7V TO 5.5V

PART

INPUT

OFF

OUT

Typical Operating Circuit

FAULT

-40°C to +85°C

Ordering Information

TEMP RANGE

MAX1931

µMAX

Pin Configuration

GND

OUT

FAULT

GND

PIN-PACKAGE

10µMAX

Features

OUTPUT

Related parts for MAX1931EUB+

MAX1931EUB+ Summary of contents

Page 1

... Notebook Computers Portable Equipment Docking Stations Hot Plug-In Power Supplies Battery-Charger Circuits _______________________________________________________________ Maxim Integrated Products 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. o 0.5A Guaranteed Output Current o Guaranteed 0.75A Short-Circuit Protection o 10ms Internal Fault-Blanking Timeout ...

Page 2

Current-Limited Switch for Single USB Port ABSOLUTE MAXIMUM RATINGS IN, ON (ON), FAULT to GND....................................-0.3V to +6V OUT to GND ................................................-0. Maximum Continuous Switch Current .....1.2A (internally limited) OUT Short Circuit to GND ..........................................Continuous Continuous Power Dissipation (T ...

Page 3

Current-Limited Switch for Single USB Port ELECTRICAL CHARACTERISTICS ( -40°C to +85°C, unless otherwise noted.) (Note PARAMETER SYMBOL Operating Voltage V Quiescent Current Off Supply Current Undervoltage Lockout UVLO Off Switch Leakage On-Resistance ...

Page 4

Current-Limited Switch for Single USB Port ( +25°C, unless otherwise noted QUIESCENT CURRENT vs. INPUT VOLTAGE GND ( (ON OUT ...

Page 5

Current-Limited Switch for Single USB Port ( +25°C, unless otherwise noted FAULT-BLANKING TIMEOUT vs. TEMPERATURE 850mA OUT -40 -20 ...

Page 6

Current-Limited Switch for Single USB Port PIN NAME Input. P-channel MOSFET source. Connect all IN pins together and bypass with a 1µ ceramic capacitor to ground. Switch Output. P-channel MOSFET drain. Connect all OUT pins together ...

Page 7

Current-Limited Switch for Single USB Port spurious FAULT output. Load-transient faults less than 10ms (typ) do not cause a FAULT output assertion. Only current-limit faults are blanked. Die overtempera- ture faults and input voltage droops below the UVLO threshold cause ...

Page 8

... Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 _____________________ 8 © 2002 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products ...

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