AAT1142ITP-1.8-T1 Advanced Analogic Technologies, Inc., AAT1142ITP-1.8-T1 Datasheet

AAT1142ITP-1.8-T1

Manufacturer Part Number

AAT1142ITP-1.8-T1

Description

Manufacturer

Advanced Analogic Technologies, Inc.

Datasheets

1.AAT1142ITP-1.8-T1.pdf (22 pages)

2.AAT1142ITP-1.8-T1.pdf (22 pages)

3.AAT1142ITP-1.8-T1.pdf (22 pages)

Specifications of AAT1142ITP-1.8-T1

Date_code

06+

Packing_info

TSOPJW-12

Current page: 1 of 22
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General Description

The AAT1142 SwitchReg is a dynamically pro-

grammable 2.2MHz step-down converter with an

input voltage range of 2.7V to 5.5V and output from

0.6V to 2.0V. Its low supply current, high level of

integration, and small footprint make the AAT1142

the ideal choice for microprocessor core power in

systems such as smartphones.

The 2.2MHz switching frequency allows the use of

a small external inductor and capacitors. Peak cur-

rent mode control and internal compensation pro-

vide stable operation and fast voltage response

without over/undershoot or ringing.

The AAT1142 delivers up to 800mA of output current

while consuming 35µA of typical no load quiescent

current. Dynamic Voltage Management is provided

through I

Serial Control™) single wire interface. The user can

program the output from 0.6V to 2.0V in 50mV steps.

The AAT1142 optimizes power efficiency through-

out the load range via PWM/PFM mode. Pulling

the MODE/SYNC pin high enables PWM Only

mode, maintaining constant frequency and low

noise across the operating range. Alternatively, the

converter may be synchronized to an external

clock input via the MODE/SYNC pin. Over-temper-

ature and short-circuit protection safeguard the

AAT1142 and system components from damage.

The AAT1142 is available in a Pb-free, space-sav-

ing 2.85x3.0x1.0mm TSOPJW-12 package or a

Pb-free, low-profile 3x3x0.8mm TDFN33-12 pack-

age. The device is rated over the -40°C to +85°C

temperature range.

Typical Application

1142.2006.07.1.0

*Optional S

Cwire*

Cwire or I

C or AnalogicTech's S

: 2.7V to 5.5V

C Input

4.7µF

VIN

MODE/SYNC

SDA

SCL

EN/SET

AAT1142

AGND

PGND

Cwire™ (Simple

2.2µH

800mA Voltage-Scaling Step-Down Converter

800mA Maximum

OUT

: 0.6V to 2.0V

10µF

Features

•

Applications

•

Dynamic Voltage Management:

— 50mV Output Resolution

— Fast, Stable Response

Serial Control Options:

— I

— S

800mA Output Current

Up to 93% Efficiency

Line, Load Regulation Less Than ±0.5%

2.2MHz Switching Frequency

Ultra-Small External Filter

Low 35µA No Load Quiescent Current

100% Duty Cycle Low Dropout Operation

Internal Soft Start

Over-Temperature Protection

Current Limit Protection

Multi-Function MODE/SYNC Pin:

— PFM/PWM for High Efficiency

— PWM Only for Low Noise

— Clock Input to Synchronize to System Clock

TSOPJW-12 or TDFN33-12 Package

Temperature Range: -40°C to +85°C

Camcorders

Cellular Phones and Smartphones

Digital Still Cameras

Handheld Instruments

Microprocessor / DSP Core

MP3, Portable Music, and Portable Media

Players

PDAs and Handheld Computers

100

OUT

Range: 2.7V to 5.5V

C Two-Wire Interface

Programmable Range: 0.6V to 2.0V

= 3.6V

Cwire Single-Wire Interface

= 5.0V

Efficiency vs. Load

Output Current (mA)

= 4.2V

= 2.7V

OUT

= 1.8V)

SwitchReg

PWM Only

Mode

AAT1142

100

1000

™

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