AAT1142 datasheet(4/22 Pages) ANALOGICTECH

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Electrical Characteristics1

L = 2.2µH, CIN = COUT = 10µF, VIN = 3.6V, TA = -40°C to +85°C, unless otherwise noted. Typical values are

at TA = 25°C.

Symbol

Description

Conditions

Min

Typ

Max Units

Step-Down Converter

VIN

Input Voltage

2.7

5.5

VIN Rising

2.7

VUVLO

UVLO Threshold

Hysteresis

250

VIN Falling

2.0

VOUT

Output Voltage Tolerance

IOUT = 0mA to 800mA,

-3.0

3.0

VIN = 2.7V to 5.5V

VOUT

VOUT Programmable Range

0.6

2.0

VSLEW

Output Voltage Programming

COUT = 10µF

mV/µs

Slew Rate

Quiescent Current

No Load

µA

ISHDN

Shutdown Current

EN/SET = AGND = PGND

1.0

µA

ILIM

P-Channel Current Limit

1.0

RDS(ON)H

High Side Switch On Resistance

0.29

RDS(ON)L

Low Side Switch On Resistance

0.24

ILXLEAK

LX Leakage Current

VIN = 5.5V, VLX = 0V to VIN

1µA

ΔVOUT/

Line Regulation

VIN = 2.7V to 5.5V

0.2

%/V

VOUT*ΔVIN

ROUT

Output Impedance

250

Start-Up Time

From Enable to Output Regulation

100

µs

FOSC

Oscillator Frequency

2.2

MHz

FSYNC

SYNC Frequency Range

1.0

3.0

MHz

TSD

Over-Temperature Shutdown

140

°C

Threshold

THYS

Over-Temperature Shutdown

°C

Hysteresis

AAT1142

800mA Voltage-Scaling Step-Down Converter

1142.2006.07.1.0

1. The AAT1142 is guaranteed to meet performance specifications over the -40°C to +85°C operating temperature range and is assured

by design, characterization, and correlation with statistical process controls.

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