MAX1693-MAX1694 Maxim, MAX1693-MAX1694 Datasheet

MAX1693-MAX1694

Manufacturer Part Number

MAX1693-MAX1694

Description

USB Current-Limited Switches with Fault Blanking

Manufacturer

Maxim

Datasheet

1.MAX1693-MAX1694.pdf (8 pages)

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The MAX1693/MAX1694 are current-limited, 60m

switches with built-in fault blanking. Their accurate pre-

set current limit of 0.7A to 1.0A makes them ideally suit-

ed for USB applications. Their low quiescent supply

current (14µA) and shutdown current (1µA) conserve

battery power in portable applications. The MAX1693/

MAX1694 operate with inputs from +2.7V to +5.5V,

making them 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 MAX1693, an output overcurrent condition caus-

es the switch to current limit at 0.7A to 1.0A and FAULT

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

overcurrent condition is removed, FAULT returns to its

high-impedance state. In the MAX1694, any overcur-

rent longer than 10ms will latch the switch open and set

FAULT low. The latch is cleared by cycling the ON

input or by powering up the device again. This feature

saves power by preventing the device from thermally

cycling on and off in case of a persistent short-circuit

condition.

The MAX1693/MAX1694 have several safety features to

ensure that the USB port is protected. Built-in thermal-

overload protection limits power dissipation and junc-

tion temperatures. Both devices have accurate internal

current-limiting circuitry to protect the input supply

against overload. They are available in space-saving

10-pin µMAX packages.

19-1518; Rev 0; 9/99

For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800.

For small orders, phone 1-800-835-8769.

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OUT

________________________________________________________________ Maxim Integrated Products

MAX1693

MAX1694

General Description

MAX

Pin Configuration

OUT

FAULT

GND

USB Current-Limited Switches

MAX1693EUB

MAX1694EUB

Accurate Current Limit (0.7A min, 1.0A max)

Guaranteed 0.75A Short-Circuit Protection

10ms Internal Fault-Blanking Timeout

No Fault Signal During Power-Up

Latched FAULT Output Turns Off Power Switch

(MAX1694)

Thermal Shutdown Protection

+2.7V to +5.5V Supply Range

14µA Supply Current

Small 10-Pin µMAX Package

UL Recognition Pending

+2.7V TO +5.5V

PART

USB Ports and Hubs

Notebook Computers

Portable Equipment

Docking Stations

Hot Plug-In Power Supplies

Battery-Charger Circuits

INPUT

with Fault Blanking

OFF

Typical Operating Circuit

-40°C to +85°C

TEMP. RANGE

FAULT

Ordering Information

MAX1693

MAX1694

GND

Applications

OUT

10 µMAX

PIN-PACKAGE

Features

OUTPUT

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