Datasheet > AAT2146

AAT2146

更新时间： 2024-09-25 04:03:15

品牌	Logo	应用领域
ANALOGICTECH		转换器
页数	文件大小	规格书
19页	1243K
描述
Low Noise, Fast Transient 600mA Step-Down Converter

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AAT2146 数据手册

PRODUCT DATASHEET

AAT2146

SwitchReg

Low Noise, FastTransient 600mA Step-Down Converter

General Description

Features

The AAT2146 SwitchReg is a 2MHz step-down converter

with an input voltage range of 2.7V to 5.5V and output

voltage as low as 0.6V. It is optimized to react quickly to

a load variation. The AAT2146 incorporates a unique low

noise architecture which reduces ripple and spectral

noise.

• V_INRange: 2.7V to 5.5V

• Low Noise Light Load Mode

• Low Ripple PWM Mode

• V_OUTFixed or Adjustable from 0.6V to V_IN

• 37μA No Load Quiescent Current

• Up to 98% Efficiency

• 600mA Max Output Current

• 2MHz Switching Frequency

• 150μs Soft Start

• Fast Load Transient

• Over-Temperature Protection

• Current Limit Protection

• 100% Duty Cycle Low-Dropout Operation

• <1μA Shutdown Current

• SC70JW-8 Package

The AAT2146 is available in fixed voltage versions with

internal feedback and a programmable version with

external feedback resistors. It can deliver 600mA of load

current while maintaining a low 37μA no load quiescent

current. The 2MHz switching frequency minimizes the

size of external components while keeping switching

losses low.

The AAT2146 is designed to maintain high efficiency

throughout the operating range, which is critical for por-

table applications.

• Temperature Range: -40°C to +85°C

The AAT2146 is available in the Pb-free, space-saving

2.0x2.1mm SC70JW-8 package and is rated over the

-40°C to +85°C temperature range.

Applications

• Cellular Phones

• Digital Cameras

• Handheld Instruments

• Microprocessor / DSP Core / IO Power

• PDAs and Handheld Computers

• USB Devices

Typical Application (Fixed Output Voltage)

AAT2146

V_O

V_IN

OUT

VIN

4.7µH

2.2µF

4.7µF

PGND

AGND

PGND

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