Datasheet > AAT4674

AAT4674

更新时间： 2024-09-24 04:30:35

品牌	Logo	应用领域
ANALOGICTECH		开关
页数	文件大小	规格书
13页	243K
描述
Power Supply Selector Switch

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AAT4674 数据手册

AAT4674

Power Supply Selector Switch

™

SmartSwitch

General Description

Features

The AAT4674/4674-1 are members of Analogic-

Tech’s Application Specific Power Management

SmartSwitch™ family. These devices are dual

input single output power supply selector switches

designed to operate from batteries, or any other

power supply with an input voltage up to 6V.

•

Input Voltage Supply Range: 2.5V to 6V

High Level of Integration:

— Reverse Blocking Diode

— Current Sensing

— Programmable Current Limit

— Single Control Pin Switching

Break-Before-Make Switch-Over

— Minimum Output Voltage Drop During

Change-Over

•

The AAT4674/4674-1 connects the supply voltage

on IN1 to OUT, or IN2 to OUT, through a very low

R_DS(ON)power MOSFET that minimizes voltage

drops and power dissipation. The enable (EN) and

select (SEL) pin voltages control the operational

state of the internal power MOSFET switches.

Once enabled, the SEL pin will switch between the

IN1 and IN2 inputs. If both input voltages are below

the UVLO, then the AAT4674 output floats. In the

case of the AAT4674-1, if one of the input voltages

is above the UVLO threshold then that input volt-

age that is above the UVLO threshold is passed

through to the output.

•

Shutdown Current < 1µA

Thermal Protection

TSOPJW-12 Package

Applications

•

Bluetooth™ Headsets

Cell Phones

Digital Still Cameras

MP3 Players

Personal Data Assistants (PDAs)

Set Top Boxes

The two power switches are current limited and the

current limit thresholds can be programmed through

the resistors on IIN1 and IIN2 pins respectively.

The AAT4674/4674-1 are available in thermally

enhanced, space-saving Pb-free 12-pin TSOPJW

packages. The AAT4674/4674-1 are specified for

operation over the -40°C to +85°C temperature

range.

Typical Application

+5V

IN1

IN2

OUT

System Load

+3.3V

IIN1

IIN2

SEL

IN1/IN2 Select

Enable

R_IIN2

R_IIN1

GND

4674.2007.09.1.0

12 3 4 5 6 7...13

中文翻译

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