Rev. 1.

3 August 2008

www.aosmd.com

Page 1 of 12

AOZ1300

Programmable 4A Power Distribution Switch

General Description

The AOZ1300 is a current-limited power distribution

switch intended for applications that require circuit

protection. The device operates from a 2.7V to

6.0V

input supply and provides up to 4A load current.

AOZ1300 offers robust fault protection features including

over-current/short-circuit protection and thermal overload

protection. The current limit is programmable with an

external resistor. An open-drain fault indicator is provided

to alert a system controller of thermal overload, over-

current, and short-circuit events. A 24ms fault blanking

time eliminates false alarms.

The AOZ1300 employs internal soft-start circuitry to

control inrush current due to highly capacitive loads

associated with hot-plug events. An adjustable slew rate

control pin provides additional slew rate control if needed.

The AOZ1300 is available in SO-8 package.

Features

●

40m

Ω maximum on-resistance

●

4A maximum continuous current

●

2.7V to

6.0V operating voltage

●

Resistor programmable current limit

●

Reverse current blocking

●

Thermal overload protection

●

Very fast short-circuit response time

●

Fault latch with 24ms blanking time

●

Open-drain fault indicator

●

1µA shutdown current

Applications

●

Docking stations

●

Notebook PCs

●

RAID systems

●

Telecom and Server hot-plug

●

USB Power Distribution

●

Compact PCI adapter Cards

Typical Application

Figure 1. High Current USB Host

VIN

VOUT

AOZ1300

C1

1µF

ISET

C2

4.7µF

OUT

ON

OFF

IN

EN

GND

SLEW

C3

10nF

R2

10kΩ

R1

100kΩ

FLT

FAULT

TO USB

PORT