AAT1154IAS-3.3-T1(2003) 데이터 시트보기 (PDF) - Analog Technology Inc

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AAT1154IAS-3.3-T1
(Rev.:2003)

1MHz 3A Buck DC/DC Converter

Analog Technology Inc 

General Description

The AAT1154 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 3A

with an internal power MOSFET, the current-mode

controlled IC provides high efficiency. Fully inter-

nally compensated, the AAT1154 simplifies system

design and lowers external part count.

The AAT1154 is available in an SOP-8 package,

rated over -40 to 85°C.

AAT1154

1MHz 3A Buck DC/DC Converter

Features

SwitchReg™

• VIN Range: 2.7-5.5Volts

• Fixed or adjustable VOUT: 1.0V - 4.2V

• 3A output current

• Up to 95% efficiency

• Integrated low on resistance power switch

• Internally compensated current mode control

• 1MHz switching frequency

• Constant PWM mode

• Low output ripple with light load

• Internal softstart

• Current limit protection

• Over-Temperature protection

• SOP-8 package

• -40 to 85°C Temperature Range

Typical Application

INPUT

100Ω

10µF

0.1µF

Applications

• Computer Peripherals

• Set Top Boxes

• Network Cards

• Cable/DSL Modems

• High efficiency conversion from 5V or 3.3V

supply

VP

FB

AAT1154

VCC

LX

ENABLE

GND

1.5µH

120µF

OUTPUT

1154.2003.08.0.91

1

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