Datasheet > AAT2503

AAT2503

更新时间： 2022-05-07 12:54:36

品牌	Logo	应用领域
思佳讯 - SKYWORKS		稳压器
页数	文件大小	规格书
22页	1792K
描述
Adjustable Three-Channel Regulator

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DATA SHEET

AAT2503

AdjustableThree-Channel Regulator

General Description

Features

The AAT2503 is a three-channel regulator consisting of a

step-down converter with an input voltage range of 2.7V

to 5.5V plus two low dropout (LDO) linear regulators.

• 800mA Step-Down Converter

V_INRange: 2.7V to 5.5V

V_OUTRange: 0.9V to V_IN

High Efficiency

2MHz Switching Frequency

▪

The step-down converter optimizes power efficiency

throughout the load range. Pulling the MODE/SYNC pin

high enables “PWM Only” mode, maintaining constant

frequency and low output ripple across the operating

range. Alternatively, the converter may be synchronized

to an external clock input to the MODE/SYNC pin. The

step-down converter delivers up to 800mA of output cur-

rent, while consuming 30μA of typical no load quiescent

current. The switching frequency is 2MHz, minimizing

the size of external components.

• Two 150mA Low Dropout Regulators

LDO Input Voltage Range: 1.62V to 5.5V

V_OUTRange: 0.6V to V_IN

High Output Accuracy: ±1.5%

▪

• 85μA of Total I_Q

• Independent Enable Pins

• Integrated Power MOSFETs

• Over-Temperature Protection

• QFN34-20 Package

The two LDOs (LDOA/LDOB) have independent inputs

and are capable of delivering up to 150mA each. Ultra

low input voltage on the VLDOA and VLDOB pins (down

to 1.62V) allows for efficient post-buck regulation. A

Power-OK (POK) function provides an open drain output

signal when LDOA is within regulation. Both LDOs fea-

ture low quiescent current and a low dropout voltage.

The output voltages for both LDOs are adjustable to as

low as 0.6V. The linear regulators have independent

Enable pins.

• -40°C to +85°C Temperature Range

Applications

• Cellular Phones

• Digital Cameras

• Handheld Instruments

• Microprocessor/DSP Core/IO Power

• PDAs and Handheld Computers

The AAT2503 is available in a Pb-free 3 x 4mm QFN34-

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

perature range.

Typical Application

V_OUT(Buck)

AAT2503

V_IN

R₁

VIN

OUTA

R₃

100kΩ

OUTA

R₄

10μF

VLDOA

VLDOB

POK

FBA

POK

OUTB

FBB

R₅

R₈

2.2μF

R₇

R₂

MODE/SYNC

ENA

2.2μF

PGND

AGND

ENB

Skyworks Solutions, Inc.

•

Phone [781] 376-3000

•

Fax [781] 376-3100

•

sales@skyworksinc.com

•

www.skyworksinc.com

202016B

•

Skyworks Proprietary Information

•

Products and Product Information are Subject to Change Without Notice.

•

March 19, 2013

12 3 4 5 6 7...22

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