PRODUCT DATASHEET
AAT2146
SwitchReg
TM
Electrical Characteristics
1
T
A
= -40°C to +85°C, unless otherwise noted. Typical values are T
A
= 25°C, V
IN
= 3.6V.
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
V
OUT
I
OUT
R
OUT
T
S
F
OSC
T
SD
T
HYS
EN
V
EN(L)
V
EN(H)
I
EN
Low Noise, Fast Transient 600mA 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
Out Threshold Voltage Accuracy
Out Leakage Current
Out Impedance
Start-Up Time
Oscillator Frequency
Over-Temperature Shutdown Threshold
Over-Temperature Shutdown Hysteresis
Enable Threshold Low
Enable Threshold High
Input Low Current
Conditions
Min
2.7
Typ
Max
5.5
2.7
Units
V
V
mV
V
%
V
μA
μA
mA
Ω
Ω
%/V
mV
μA
kΩ
μs
MHz
°C
°C
V
V
μA
Step-Down Converter
V
IN
Rising
Hysteresis
V
IN
Falling
I
OUT
= 0mA to 600mA, V
IN
= 2.7V to 5.5V
No Load, 0.6V Adjustable Version
EN = AGND = PGND
800
0.35
0.30
0.1
600
100
1.8
-3.0
0.6
37
+3.0
V
IN
70
1.0
V
IN
= 2.7V to 5.5V; I
OUT
= 600mA
0.6V Output, No Load; T
A
= 25°C
0.6V Output
>0.6V Output
From Enable to Output Regulation
T
A
= 25°C
591
250
0.9
609
0.2
150
2.0
140
15
2.6
0.6
V
IN
= V
OUT
= 5.5V
1.4
-1.0
1.0
1. The AAT2146 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.
4
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2146.2008.10.1.2
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