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AAT2789IRN-AA-T1

更新时间： 2024-02-25 16:26:31

品牌	Logo	应用领域
ANALOGICTECH		转换器稳压器开关式稳压器或控制器电源电路开关式控制器
页数	文件大小	规格书
22页	794K
描述
Low Noise, High Frequency Dual Step-Down Converter

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技术参数
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AAT2789IRN-AA-T1 技术参数

生命周期：	Obsolete	包装说明：	,
Reach Compliance Code：	unknown	ECCN代码：	EAR99
HTS代码：	8542.39.00.01	风险等级：	5.84
Is Samacsys：	N	模拟集成电路 - 其他类型：	SWITCHING REGULATOR
Base Number Matches：	1

AAT2789IRN-AA-T1 数据手册

PRODUCT DATASHEET

AAT2789

SystemPower^TM

Low Noise, High Frequency Dual Step-Down Converter

General Description

Features

•

The AAT2789 is a 2-channel synchronous step-down

converter operating from an input voltage range of 2.7V

to 5.5V, making it the ideal choice for single-cell Lithium-

ion/polymer battery powered systems or low voltage

3.3V and 5V based consumer equipment.

V_INRange: 2.7V to 5.5V

Output Voltage Range: 0.6V to V_IN

Low Noise Light Load Mode

Low Ripple PWM Mode

Output Current:

Channel 1: 1700mA

Channel 2: 800mA

▪

Channel 1 delivers up to 1700mA output current while

Channel 2 delivers up to 800mA. Both converters incor-

porate a unique low noise architecture which reduces

output ripple and spectral noise.

•

Highly Efficient Step-Down Converters

Low R_DS(ON)Integrated Power Switches

100% Duty Cycle

High Switching Frequency

Peak Current Mode Control

Internal Compensation

Excellent Transient Response

Internal Soft Start

Fast Turn-On Time

Over-Temperature Protection

Current Limit Protection

Low Profile TDFN34-16 Package

-40°C to 85°C Temperature Range

The AAT2789 uses a high switching frequency to mini-

mize external filter sizing. Peak current mode control

eliminates external compensation while optimizing tran-

sient performance and stability.

The AAT2789 requires a minimum of external compo-

nents to realize a high efficiency dual-output step-down

converter while minimizing solution size and footprint.

Each of the step-down regulators has an independent

input and enable pin. Externally adjustable output volt-

age is provided. Light load operating mode provides high

efficiency over the entire load range. Low quiescent cur-

rent enables excellent life for battery powered systems.

Applications

•

Cellular and Smart Phones

Digital Cameras

The AAT2789 is available in a 3x4mm Pb-free 16-pin

TDFN package and is rated over the -40°C to 85°C oper-

ating temperature range.

Handheld Instruments

Mass Storage Systems

Microprocessor / DSP Core / IO Power

PDAs and Handheld Computers

Portable Media Players

USB Devices

Wireless Data Systems

Typical Application

V_OUT1

AAT2789

1.2V, 1700mA

V_IN: 2.7V - 5.5V

TDFN34-16

1.5μH

LX1

VP1,2

VCC1,2

EN1

59.0k

22μF

6.3V

PGND1

EN2

59.0k

FB1

AGND1

10μF

6.3V

V_OUT2

3.3μH

3.3V, 800mA

LX2

10μF

6.3V

267k

PGND2

FB2

AGND2

59.0k

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

2789.2008.03.1.0

12 3 4 5 6 7...22

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