Datasheet > AAT1157IVN-3.3-T1

AAT1157IVN-3.3-T1

更新时间： 2024-02-28 09:55:05

品牌	Logo	应用领域
ANALOGICTECH		/
页数	文件大小	规格书
15页	645K
描述
Switching Regulator/Controller,

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技术参数
数据手册

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AAT1157IVN-3.3-T1 技术参数

是否Rohs认证：	符合	生命周期：	Active
Reach Compliance Code：	unknown	ECCN代码：	EAR99
HTS代码：	8542.39.00.01	风险等级：	5.75
模拟集成电路 - 其他类型：	SWITCHING REGULATOR

AAT1157IVN-3.3-T1 数据手册

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PRODUCT DATASHEET

AAT1157

SwitchReg

1MHz 1.2A Buck DC/DC Converter

General Description

Features

The AAT1157 SwitchReg™ is a step-down switching con-

verter, ideal for applications where fixed frequency and

low ripple are required over the full range of load condi-

tions. The 2.7V to 5.5V input voltage range makes the

AAT1157 ideal for single-cell lithium-ion/polymer battery

applications. Capable of up to 1.2A with internal

MOSFETs, the current-mode controlled IC provides high

efficiency over a wide operating range. Fully integrated

compensation simplifies system design and lowers exter-

nal parts count. The device operates at a fixed 1MHz

switching frequency across all load conditions.

• V_INRange: 2.7V to 5.5V

• Up to 95% Efficiency

• 110 mΩ R_DS(ON)Internal Switches

• <1μA Shutdown Current

• 1MHz Buck Switching Frequency

• Fixed or Adjustable V_OUT≥ 0.8V

• Integrated Power Switches

• Current Mode Operation

• Internal Compensation

• Stable with Ceramic Capacitors

• Constant PWM Operation for Low Output Ripple

• Internal Soft Start

• Over-Temperature Protection

• Current Limit Protection

The AAT1157 is available in the Pb-free, 16-pin 3x3mm

QFN package and is rated over the -40°C to +85°C tem-

perature range.

• 16-Pin QFN 3x3mm Package

• -40°C to +85°C Temperature Range

Applications

• HDD MP3 Players

• Notebook Computers

• PDAs

• Point-of-Load Regulation

• Set Top Boxes

• Smart Phones

• Wireless Notebook Adapters

Typical Application

AAT1157

3.3V

2.5V

187k

100

3.0μH

10μF

VCC

N/C

59k

C3-C4

2x 22μF

PGND

0.1μF

SGND PGND

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

1157.2009.04.1.6

12 3 4 5 6 7...15

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