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AAT2782

Triple-Output PMIC: Dual Buck with Low-V

DATA SHEET

Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com

202038A • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • June 8, 2012

General Description

The AAT2782 provides three independently regulated

DC outputs: two step-down (Buck) regulators and a

single low input voltage, low drop-out (LDO) regulator.

The input voltage range for the step-down regulators is

2.7V to 5.5V, while the LDO regulator allows inputs from

1.5V to 5.5V. The low input voltage LDO regulator allows

high efficiency, step-down, low noise outputs. In addi-

tion, the LDO input may be connected to step-down

outputs 1 or 2.

The Channel 1 and 2 step-down regulators can deliver up

to 1200mA and 600mA output current, respectively.

Step-down output voltages are set with external resis-

tors. Switching frequency is set at 1.3MHz to ensure

small external filtering components. Current mode con-

trol assures fast transient response and stable operation

across the operating range. The Channel 3 LDO regulator

can deliver up to 400mA with -80dB power supply rejec-

optional bypass capacitor. The LDO output voltage is fac-

tory set with a default voltage of 1.20V. Independent

enable and input pins are provided. The device consumes

low quiescent current and provides high efficiency across

the load range for maximum life in battery systems.

The AAT2782 is available in the Pb-free, 16-pin TDFN34

package and is rated over the -40°C to 85°C operating

temperature range.

Features

• V

• V

• Output Voltage Range: 0.6V to V

IN

• Step-Down Output Current:

• LDO Output Current:

• High Efficiency with Low R

• Total Quiescient Current 170μA

• Shutdown Current: 1μA

• Step-Down Converters

• LDO Converter

• 200μs Internal Soft Start

• Over-Temperature Protection

• TDFN34-16 Low Profile Package

• -40°C to 85°C Temperature Range

Applications

• Cellular and SmartPhones

• Microprocessor / DSP Core / IO Power

• PDAs and Handheld Computers

• Portable Media Players

• Wireless Data Systems

Typical Application

AAT2782

VP2

EN2

AGND

FB2

LX2

1.2V, 1.2A

1.7V, 0.6A

1.2V, 400mA

C2

10μF

BYP

OUT3

VIN3

EN3

EP

C3

2.2μF

L2

2.2μH

C5

4.7μF

R2

59.0k

R3

107k

C7

0.01μF

AGND

VP1

EN1

VIN

GND1

FB1

LX1

C1

10μF

C4

0.1μF

L1

1.5μH

C8

10μF

R4

59.0k

R5

59.0k

2.7V –5.5V

GND2

GND2