AAT1149 Analogic Corporation, AAT1149 Datasheet

AAT1149

Manufacturer Part Number

AAT1149

Description

Manufacturer

Analogic Corporation

Datasheet

1.AAT1149.pdf (20 pages)

Available stocks

Company

Part Number

Manufacturer

Quantity

Price

Company:

Meier Automation Equipment Co., Limited

Part Number:

AAT1149IUV-0.6-T1

Manufacturer:

ANALOGIC

Quantity:

20 000

Current page: 1 of 20
Download datasheet (2Mb)

General Description

The AAT1149 SwitchReg is a 3.0MHz step-down

converter with an input voltage range of 2.7V to

5.5V and output voltage as low as 1.0V. It is opti-

mized to react quickly to load variations and oper-

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

The AAT1149 output voltage is programmable via

external feedback resistors. It can deliver 400mA of

load current while maintaining a low 45μA no load

quiescent current. The 3.0MHz switching frequen-

cy minimizes the size of external components while

keeping switching losses low.

The AAT1149 maintains high efficiency throughout

the operating range, which is critical for portable

applications.

The AAT1149 is available in a Pb-free, space-saving

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

the -40°C to +85°C temperature range.

Typical Application

1149.2006.11.1.0

4.7µF

= 3.6V

AGND

PGND

AAT1149

PGND

Features

•

Applications

•

Ultra-Small 0603 Inductor (Height = 1mm)

400mA Max Output Current

Up to 98% Efficiency

45μA No Load Quiescent Current

3.0MHz Switching Frequency

70μs Soft Start

Fast Load Transient

Over-Temperature Protection

Current Limit Protection

100% Duty Cycle Low-Dropout Operation

<1μA Shutdown Current

SC70JW-8 Package

Temperature Range: -40°C to +85°C

Cellular Phones

Digital Cameras

Handheld Instruments

Microprocessor / DSP Core / IO Power

PDAs and Handheld Computers

USB Devices

OUT

400mA Step-Down Converter

Range: 2.7V to 5.5V

Adjustable from 1.0V to V

L1 1.8µH

59k

118k

3MHz Fast Transient

OUT

= 1.8V

4.7µF

SwitchReg

™

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