AAT1155(2004) Ver la hoja de datos (PDF) - Analog Technology Inc

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componentes Descripción

Fabricante

AAT1155
(Rev.:2004)

1MHz 2.5A Buck DC/DC Converter

Analog Technology Inc 

General Description

The AAT1155 SwitchReg™ is a member of

AnalogicTech™'s Total Power Management™ IC

product family. The Step-down switching converter

is ideal for applications where high efficiency, small

size, and low ripple are critical. Able to deliver 2.5A

with an internal power MOSFET, the current-mode

controlled IC provides high efficiency. Fully inter-

nally compensated, the AAT1155 simplifies system

design and lowers external part count.

The AAT1155 is available in an MSOP-8 package,

rated over -40 to 85°C.

AAT1155

1MHz 2.5A Buck DC/DC Converter

Features

SwitchReg™

• 5.5V max supply input

• -40 to 85°C Temperature Range

• Fixed output voltage: 1.0V - 4.2V

• 2.5A output current

• Integrated low on resistance power switches

• Internally compensated current mode control

• 1MHz switching frequency

• Fixed or adjustable VOUT: 1.0 to 4.2V

• Constant PWM mode

• Low output ripple with light load

• Internal softstart

• Current limit protection

• Over-Temperature protection

• MSOP-8 package

• Up to 95% efficiency

Typical Application

INPUT

10µF

100Ω

0.1µF

Applications

• Computer Peripherals

• Set Top Boxes

• Network Cards

• Cable/DSL Modems

• High efficiency conversion from 5V or 3.3V

supply

VP

FB

AAT1155 LX

LX

ENABLE

VCC

SGND

PGND

1.5µH

120µF

OUTPUT

1155.2004.08.1.2

1

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