Datasheet > AAT1161

AAT1161

更新时间： 2022-04-23 23:00:11

品牌	Logo	应用领域
ANALOGICTECH		转换器
页数	文件大小	规格书
18页	1390K
描述
13.2V Input, 3A Step-Down Converter

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AAT1161 数据手册

PRODUCT DATASHEET

AAT1161

SwitchReg

13.2V Input, 3A Step-Down Converter

General Description

Features

The AAT1161 is an 800kHz high efficiency step down

DC-DC converter with wide input voltage range. With

4.0V to 13.2V input rating, the AAT1161 is the perfect

choice for 2-cell Li+ battery powered devices and mid

power range regulated 12V powered applications. The

internal power switch is capable of delivering up to 3A

load current.

• Input Voltage Range : 4.0V to 13.2V

• Up to 3A Load Current

• Fixed or Adjustable Output:

Output Voltage: 0.6V to V_IN

• Less than 1μA Shutdown Current

• Up to 95% Efficiency

▪

• Integrated High-Side Power Switch

• External Schottky Rectifier

• 800kHz Switching Frequency

• Soft Start Function

• Short-Circuit and Over-Temperature Protection

• Minimum External Components

• Tiny 14-pin 3x3mm TDFN Package

• Temperature Range: -40°C to +85°C

The AAT1161 is a highly integrated device in order to

simplify system level design for the users. It is a non-

synchronous converter that is used with an external

Schottky diode rectifier for low-cost applications.

Minimum external components are required for the con-

verter. All the control circuits are integrated in the IC.

The AAT1161 optimizes efficiency throughout the entire

load range. It operates in a combination PWM/Light Load

mode for improved light-load efficiency. It can also oper-

ate in a forced Pulse Width Modulation (PWM) mode for

easy control of the switching noise as well as faster tran-

sient response. The high switching frequency allows the

use of small external components. The low current shut-

down feature disconnects the load from V_INand drops

shutdown current to less than 1μA.

Applications

• Digital Camcorders

• Industrial Applications

• Portable DVD Players

• Rack Mounted Systems

• Set Top Boxes

The AAT1161 is available in a Pb-free, space-saving,

thermally-enhanced 14-pin TDFN33 package and is rated

over an operating temperature range of -40°C to +85°C.

Typical Application

L₁

V_OUT

V_IN4.5V- 13.2V

3.8µH

5V, 3A

R₄

C₁

R₃

10Ω

C₆

100pF

C_{3, 4, 5}

66µF

C₂

0.1µF

432kΩ

10µF

AAT1161

4, 5

AIN

C₈

1µF

R₆

59kΩ

PGND

COMP

DGND

N/C

R₅

51kΩ

AGND

LDO

PGND

EP1

C₇

150pF

C₉

1µF

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

1161.2008.03.1.0

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