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

201999B • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • March 20, 2013

AAT1171

600mA Voltage-Scaling Step-Down Converter

for RF Power Amplifiers with Bypass Switch

DATA SHEET

Symbol Description

Conditions

Min

Typ

Max

Units

Input Voltage

2.7

5.5

V

UVLO Threshold

2.6

V

UVLO Hysteresis

200

mV

0.6

3.6

V

Input Voltage Range from DAC

0.2

1.2

V

Quiescent Current

No Load, Light Load

45

70

μA

420

Shutdown Current

GND

1.0

μA

P-Channel Current Limit

1.2

1.6

A

High Side Switch On Resistance

230

mΩ

Low Side Switch On Resistance

230

mΩ

Bypass Switch Resistance

85

mΩ

LX Leakage Current

1

μA

Load Regulation

0.5

%

Line Regulation

0.2

%/V

Feedback Impedance

170

kΩ

Output Voltage Accuracy

1.746

1.8

1.854

V

Oscillator Frequency

2.0

MHz

Over-Temperature Shutdown Threshold

140

°C

Over-Temperature Shutdown Hysteresis

15

°C

Light Load Load Current Threshold

100

mA

Output Voltage Settling Time

30

μs

PWM/Light Load/EN

Enable Threshold Low

0.6

V

Enable Threshold High

1.4

V

Input Low Current

-1.0

1.0

μA

Turn-On Enable Response Time

AAT1171-1: EN = Low to High, MODE/SYNC

150

μs

AAT1171-4/AAT1171-5: EN = Low to High,

50

MODE/SYNC

Synchronization Frequency

19.8

MHz

SYNC(H)

MODE/SYNC High Level Threshold

0.4

V

SYNC(L)

MODE/SYNC Low Level Threshold

0.4

V

MODE/SYNC Low Current

-1.0

1.0

μA

DAC Input

Gain

3

V/V

1. The AAT1171 is guaranteed to meet performance specifications over the -40°C to +85°C operating temperature range and is assured by design, characterization, and correla-

tion with statistical process controls.

2. Please contact Sales for other synchronization frequencies.

3. Please contact Sales for other output voltage/DAC voltage gains.