Electrical Characteristics

1

V

Symbol

Description

Conditions

Min

Typ

Max

Units

V

IN

Input Voltage

2.7

5.5

V

V

2.3

V

V

UVLO

UVLO Threshold

Hysteresis

70

mV

V

1.4

V

V

OUT

Output Voltage Tolerance

2

I

-3.0

3.0

%

V

V

OUT

Output Voltage Range

0.6

V

IN

V

I

Q

Quiescent Current

No Load

45

85

µA

I

SHDN

Shutdown Current

EN = GND

1.0

µA

I

LIM

P-Channel Current Limit

700

mA

R

DS(ON)H

High-Side Switch On Resistance

0.59

Ω

R

DS(ON)L

Low-Side Switch On Resistance

0.42

Ω

ΔV

Line Regulation

V

0.2

%/V

V

FB

Feedback Threshold Voltage Accuracy

V

0.591

0.600

0.609

V

I

FB

FB Leakage Current

V

0.2

µA

F

OSC

Oscillator Frequency

1.8

MHz

T

S

Startup Time

From Enable to Output

100

µs

Regulation

T

SD

Over-Temperature Shutdown Threshold

105

°C

T

HYS

Over-Temperature Shutdown Hysteresis

15

°C

V

EN(L)

Enable Threshold Low

0.6

V

V

EN(H)

Enable Threshold High

1.4

V

I

EN

Input Low Current

V

-1.0

1.0

µA

1. The AAT2120 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.

2. Output voltage tolerance is independent of feedback resistor network accuracy.

4

2120.2007.10.1.1

AAT2120

500mA Low Noise Step-Down Converter