Datasheet > AAT1149A

AAT1149A

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
17页	1859K
描述
2.2MHz Fast Transient 400mA Step-Down Converter

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AAT1149A 数据手册

PRODUCT DATASHEET

AAT1149A

SwitchReg

2.2MHz FastTransient 400mA Step-Down Converter

General Description

Features

The AAT1149A SwitchReg is a 2.2MHz step-down con-

verter with an input voltage range of 2.2V to 5.5V. It is

optimized to react quickly to load variations and operate

with a tiny 0603 inductor that is only 1mm tall.

• Ultra-Small 0603 Inductor (Height = 1mm)

• V_INRange: 2.2V to 5.5V

• V_OUTFixed 1.875V

• 400mA Max Output Current

• Up to 98% Efficiency

• 3mA No Load Quiescent Current

• 2.2MHz Switching Frequency

• 70μs Soft Start

The AAT1149A can deliver 400mA of load current and

operates in PWM only mode for low noise operation. The

2.2MHz switching frequency minimizes the size of exter-

nal components while keeping switching losses low.

• Fast Load Transient

The AAT1149A is optimized for low noise portable

applications.

• Over-Temperature Protection

• Current Limit Protection

• 100% Duty Cycle Low-Dropout Operation

• <1μA Shutdown Current

• 0.9x1.2mm WLCSP Package

• Temperature Range: -40°C to +85°C

The AAT1149A is available in a Pb-free, space-saving

5-pin wafer-level chip scale (WLCSP) package and is

rated over the -40°C to +85°C temperature range.

Applications

• Cellular Phones

• Digital Cameras

• Handheld Instruments

• Microprocessor / DSP Core / IO Power

• PDAs and Handheld Computers

• USB Devices

Typical Application

V_IN= 3.6V

V_OUT= 1.875V

AAT1149A

L1 2.2µH

4.7µF

PGND

AGND

PGND

4.7µF

w w w . a n a l o g i c t e c h . c o m

1149A.2008.08.1.1

12 3 4 5 6 7...17

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