Datasheet > AAT1143_06

AAT1143_06

更新时间： 2022-04-23 23:00:11

品牌	Logo	应用领域
ANALOGICTECH		转换器
页数	文件大小	规格书
20页	782K
描述
1MHz 400mA Step-Down Converter

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AAT1143_06 数据手册

AAT1143

1MHz 400mA Step-Down Converter

™

SwitchReg

General Description

Features

The AAT1143 SwitchReg™ is a 1MHz step-down

converter with an input voltage range of 2.7V to

5.5V and output as low as 0.6V. Its low supply cur-

rent, small size, and high switching frequency

make the AAT1143 the ideal choice for portable

applications.

•

V_INRange: 2.7V to 5.5V

V_OUTAdjustable Down to 0.6V

— Fixed or Adjustable Version

25μA No Load Quiescent Current

Up to 95% Efficiency

400mA Max Output Current

1MHz Switching Frequency

Soft Start

Over-Temperature Protection

Current Limit Protection

100% Duty Cycle Low-Dropout Operation

0.1μA Shutdown Current

•

The AAT1143 is available in either a fixed version

with internal feedback or a programmable version

with external feedback resistors. It can deliver

400mA of load current while maintaining a low

25μA no load quiescent current. The 1MHz switch-

ing frequency minimizes the size of external com-

ponents while keeping switching losses low. The

AAT1143 feedback and control delivers excellent

load regulation and transient response with a small

output inductor and capacitor.

SC70JW-8 Package

Temperature Range: -40°C to +85°C

The AAT1143 is designed to maintain high efficien-

cy throughout the operating range, which is critical

for portable applications.

Applications

•

Cellular Phones

Digital Cameras

Handheld Instruments

Microprocessor / DSP Core / IO Power

PDAs and Handheld Computers

USB Devices

The AAT1143 is available in a space-saving

2.0x2.1mm SC70JW-8 package and is rated over

the -40°C to +85°C temperature range.

Typical Application (Fixed Output Voltage)

Efficiency vs. Load Current

(V_OUT= 2.5V; V_IN= 3.3V)

V_O

V_IN

AAT1143

100

VIN

4.7μH

OUT

4.7μF

AGND PGND

PGND PGND

0.1

100

1000

Output Current (mA)

1143.2006.07.1.10

12 3 4 5 6 7...20

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