AAT2786IRN-AE-T1 Advanced Analogic Technologies, Inc., AAT2786IRN-AE-T1 Datasheet

AAT2786IRN-AE-T1

Manufacturer Part Number

AAT2786IRN-AE-T1

Description

Manufacturer

Advanced Analogic Technologies, Inc.

Datasheets

1.AAT2786.pdf (27 pages)

2.AAT2786IRN-AE-T1.pdf (27 pages)

3.AAT2786IRN-AE-T1.pdf (22 pages)

Specifications of AAT2786IRN-AE-T1

Date_code

10+

Packing_info

TDFN34-16

Current page: 1 of 27
Download datasheet (4Mb)

General Description

The AAT2786 is a dual output power solution. It includes

a 1.5A, 1.4MHz, high-efficiency step-down converter and

a high performance 150mA LDO regulator. The step-

down regulator output voltage is adjustable from 0.6V to

voltage from 1.2V to 3.3V.

The step-down converter consumes only 42µA of no-load

quiescent current and is designed to maintain high effi-

ciency throughout the load range. The step-down con-

verter has ultra-low R

operate up to 100% duty cycle to enable high output

voltage, high current applications which require a low

dropout threshold. The AAT2786 provides excellent tran-

sient response and high output accuracy across the

operating range. Pulling the MODE/SYNC pin high

enables “PWM Only” mode, maintaining constant fre-

quency and low output ripple across the operating range.

Alternatively, the converter may be synchronized to an

external clock input via the MODE/SYNC pin.

The MicroPower low dropout linear regulator in the

AAT2786 has been specifically designed for high-speed

turn-on and turn-off performance, fast transient response,

and good noise and power supply ripple rejection (PSRR),

making it ideal for powering sensitive circuits with fast

switching requirements.

Over-temperature and short-circuit protection safeguard

the AAT2786 and system components from damage.

Typical Application

SystemPower

2786.2008.04.1.0

. The LDO regulator has a factory preset fixed output

BUCK IN

DS(ON)

opt

integrated MOSFETs and can

LDO IN

10µF

100

1µF

ON/OFF

10nF

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

VIN

BUCK_EN

MODE/SYNC

LDOIN

LDO_EN

BYP

N/C

AAT2786IRN

1.5A Step-Down Converter and 150mA LDO

LDO_GND

LDO_OUT

Features

• V

• 1.5A Step-Down Converter

• 150mA LDO Regulator

• Independent Enable Pins

• Integrated Power MOSFETs

• Over-Temperature Protection

• TDFN34-16 Package

• -40°C to +85°C Temperature Range

Applications

• Cellular and Smart Phones

• PDAs, Palmtops

• Digital Still and Video Cameras

• Portable Instruments

• Battery-Powered Applications

PGND

GND

▪

95% Peak Efficiency

High Efficiency across load range

42µA No Load Quiescent Current

Optional “PWM Only” Low Noise Mode

Current limit and soft start

High Power Supply Rejection Ratio

Low Output Noise

Range : 2.5V to 5.5V

OUT

Range: 0.6V to V

Range: 1.2V to 3.3V (Fixed)

3.3µH

59k

Adj

2.2µF

Opt

PRODUCT DATASHEET

22µF

LDO OUT

BUCK OUT

AAT2786

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