PRODUCT DATASHEET
AAT2120
SwitchReg
TM
Electrical Characteristics
1
V
IN
= 3.6V, T
A
= -40°C to +85°C, unless otherwise noted; typical values are T
A
= 25°C.
Symbol
V
IN
V
UVLO
V
OUT
V
OUT
I
Q
I
SHDN
I
LIM
R
DS(ON)H
R
DS(ON)L
ΔV
Linereg
/ΔV
IN
V
FB
I
FB
F
OSC
T
S
T
SD
T
HYS
V
EN(L)
V
EN(H)
I
EN
500mA Low Noise Step-Down Converter
Description
Input Voltage
UVLO Threshold
Output Voltage Tolerance
Output Voltage Range
Quiescent Current
Shutdown Current
P-Channel Current Limit
High-Side Switch On Resistance
Low-Side Switch On Resistance
Line Regulation
Feedback Threshold Voltage Accuracy
FB Leakage Current
Oscillator Frequency
Startup Time
Over-Temperature Shutdown Threshold
Over-Temperature Shutdown Hysteresis
Enable Threshold Low
Enable Threshold High
Input Low Current
2
Conditions
V
IN
Rising
Hysteresis
V
IN
Falling
I
OUT
= 0 to 500mA, V
IN
= 2.7V to 5.5V
No Load
EN = GND
Min
2.7
Typ
Max
5.5
2.3
Units
V
V
mV
V
%
V
μA
μA
mA
Ω
Ω
%/V
V
μA
MHz
μs
°C
°C
V
V
μA
70
1.4
-3.0
0.6
45
700
0.59
0.42
0.2
0.600
1.8
100
105
15
0.6
1.4
-1.0
3.0
V
IN
85
1.0
V
IN
= 2.7V to 5.5V
V
IN
= 3.6V
V
OUT
= 1.0V
From Enable to Output Regulation
0.591
0.609
0.2
V
IN
= V
EN
= 5.5V
1.0
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 correla-
tion with statistical process controls.
2. Output voltage tolerance is independent of feedback resistor network accuracy.
4
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2120.2008.02.1.2
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