AAT1143IJS-1.6-T1 Advanced Analogic Technologies, Inc., AAT1143IJS-1.6-T1 Datasheet

AAT1143IJS-1.6-T1

Manufacturer Part Number

AAT1143IJS-1.6-T1

Description

Manufacturer

Advanced Analogic Technologies, Inc.

Datasheets

1.AAT1143IJS-1.6-T1.pdf (19 pages)

2.AAT1143IJS-1.6-T1.pdf (20 pages)

Specifications of AAT1143IJS-1.6-T1

Date_code

05+

Packing_info

SO70JW-8

Current page: 1 of 19
Download datasheet (2Mb)

Typical Application (Fixed Output Voltage)

4.7μF

General Description

The AAT1143 SwitchReg™ is a 1MHz step-down con-

verter with an input voltage range of 2.7V to 5.5V and

output as low as 0.6V. Its low supply current, small size,

and high switching frequency make the AAT1143 the

ideal choice for portable applications.

The AAT1143 is available in either a fixed version with

internal feedback or a programmable version with exter-

nal feedback resistors. It can deliver 400mA of load cur-

rent while maintaining a low 25μA no load quiescent

current. The 1MHz switching frequency minimizes the

size of external components while keeping switching

losses low. The AAT1143 feedback and control delivers

excellent load regulation and transient response with a

small output inductor and capacitor.

The AAT1143 is designed to maintain high efficiency

throughout the operating range, which is critical for por-

table applications.

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.

SwitchReg

1143.2009.02.1.11

VIN

AGND

PGND

AAT1143

PGND

OUT

4.7μH

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

4.7μF

Features

• V

• 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

• SC70JW-8 Package

• Temperature Range: -40°C to +85°C

Applications

• Cellular Phones

• Digital Cameras

• Handheld Instruments

• Microprocessor / DSP Core / IO Power

• PDAs and Handheld Computers

• USB Devices

▪

OUT

Fixed or Adjustable Version

Range: 2.7V to 5.5V

Adjustable Down to 0.6V

1MHz 400mA Step-Down Converter

100

0.1

Efficiency vs. Load Current

PRODUCT DATASHEET

OUT

Output Current (mA)

= 2.5V; V

AAT1143

= 3.3V)

100

1000

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