AAT1146 Analogic Corporation, AAT1146 Datasheet

AAT1146

Manufacturer Part Number

AAT1146

Description

Manufacturer

Analogic Corporation

Datasheet

1.AAT1146.pdf (20 pages)

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General Description

The AAT1146 SwitchReg is a member of

AnalogicTech's Total Power Management IC™

(TPMIC™) product family. It is a 1.4MHz step-

down converter with an input voltage range of 2.7V

to 5.5V and output voltage as low as 0.6V. It is

optimized to react quickly to a load variation.

The AAT1146 is available in fixed voltage versions

with internal feedback and a programmable ver-

sion with external feedback resistors. It can deliver

400mA of load current while maintaining a low

27µA no load quiescent current. The 1.4MHz

switching frequency minimizes the size of external

components while keeping switching losses low.

The AAT1146 is designed to maintain high efficien-

cy throughout the operating range, which is critical

for portable applications.

The AAT1146 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 (Fixed Output Voltage)

1146.2006.01.1.2

4.7µF

Fast Transient 400mA Step-Down Converter

VIN

AGND

PGND

AAT1146

PGND

OUT

Features

•

Applications

•

27µA No Load Quiescent Current

Up to 98% Efficiency

400mA Max Output Current

1.4MHz Switching Frequency

120µs 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

Range: 2.7V to 5.5V

Fixed or Adjustable from 0.6V to V

4.7µH

4.7µF

SwitchReg

AAT1146

™

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