AAT2784 Analogic Corporation, AAT2784 Datasheet

AAT2784

Manufacturer Part Number

AAT2784

Description

Manufacturer

Analogic Corporation

Datasheet

1.AAT2784.pdf (21 pages)

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General Description

The AAT2784 is a 3-channel 1.8MHz step-down con-

verter for applications where power efficiency and solu-

tion size are critical. The input voltage range is 2.7V to

5.5V and the outputs are adjustable from 0.6V to V

Channel 3 delivers up to 1.5A output current and chan-

nels 1 and 2 deliver up to 300mA each. The AAT2784

uses a high switching frequency to minimize the size of

external components. The AAT2784 requires a minimum

of external components to realize a high efficiency triple-

output buck converter minimizing solution cost and PCB

footprint.

Each of the 3 regulators has an independent enable pin,

adjustable output voltage and operates with low no load

quiescent current, providing high efficiency over the

entire load range.

The AAT2784 is available in a Pb-free 16 pin TDFN34

package, and is rated over the -40°C to +85°C operating

temperature range.

Typical Application

SystemPower

2784.2007.11.1.1

VIN : 2.7 – 5.5V

10μF

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

EN 1

VP1_2

EN2

VP3

EN 3

AGND

AAT2784

PGND

FB1

LX2

FB2

LX3

FB3

LX1

Features

• V

• Output Voltage Range: 0.6V to V

• Output Current:

• Highly Efficient Step-Down Converters

• Low R

• 100% Duty Cycle

• 1.8 MHz Switching Frequency

• Internal Soft Start

• Fast 150μs Turn-On Time

• Over-Temperature Protection

• Current Limit Protection

• TDFN34-16 Package

• -40°C to 85°C Temperature Range

Applications

• Cellular and Smart Phones

• Digital Cameras

• Handheld Instruments

• Mass Storage Systems

• Microprocessor / DSP Core / IO Power

• PDAs and Handheld Computers

• Portable Media Players

• USB Devices

• Wireless LAN

4.7μH

1.5μH

3-Channel Step-Down DC/DC Converter

▪

Channel 3: 1.5A

Channel 1: 300mA

Channel 2: 300mA

Range: 2.7 to 5.5V

267k

59.0k

VOUT2: 3.3V

DS(ON)

300mA

59.0k

4.7μF

Integrated Power Switches

267 k

59.0k

VOUT1: 3.3V

VOUT3: 1.2V

300mA

1.5A

4.7μF

10μF

PRODUCT DATASHEET

AAT2784

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