Datasheet > AAT1151_07

AAT1151_07

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
16页	555K
描述
850kHz 700mA Synchronous Buck DC/DC Converter

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AAT1151_07 数据手册

AAT1151

850kHz 700mA Synchronous

Buck DC/DC Converter

™

SwitchReg

General Description

Features

The AAT1151 SwitchReg™ is a step-down switch-

ing converter ideal for applications where high effi-

ciency is required over the full range of output load

conditions. The 2.7V to 5.5V input voltage range

makes the AAT1151 ideal for single-cell lithium-

ion/polymer battery applications. Capable of more

than 700mA with internal MOSFETs, the current-

mode controlled IC provides high efficiency using

synchronous rectification. Fully integrated compen-

sation simplifies system design and lowers external

parts count.

•

V_INRange: 2.7V to 5.5V

Up to 95% Efficiency

High Initial Accuracy ±1%

110mΩ R_DS(ON)Internal Switches

<1μA Shutdown Current

850kHz Switching Frequency

Fixed V_OUTor Adjustable V_OUT≥1.0V

Integrated Power Switches

Synchronous Rectification

Current Mode Operation

Internal Compensation

Stable with Ceramic Capacitors

PFM for Optimum Efficiency for All Load

Conditions

Internal Soft Start

Over-Temperature Protection

Current Limit Protection

The device operates at a fixed 850kHz switching fre-

quency and enters Pulse Frequency Modulation

(PFM) mode for light load current to maintain high

efficiency across all load conditions.

•

The AAT1151 is available in Pb-free MSOP-8 and

QFN33-16 packages and is rated over the -40°C to

+85°C temperature range.

MSOP-8 and QFN33-16 Packages

-40°C to +85°C Temperature Range

Applications

•

Cellular Phones

Digital Cameras

MP3 Players

Notebook Computers

PDAs

USB-Powered Equipment

Wireless Notebook Adapters

Typical Application

INPUT

10μF

AAT1151

3.0μH

ENABLE

VCC

100Ω

0.1μF

OUTPUT

2x 22μF

PGND

SGND

1151.2007.01.1.6

12 3 4 5 6 7...16

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