PRODUCT DATASHEET
AAT2158
SwitchReg
TM
Electrical Characteristics
1
1.5A Low Noise Step-Down Converter
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
OUT
V
UVLO
V
OUT
I
Q
I
SHDN
I
LIM
R
DS(ON)H
R
DS(ON)L
DV
LOADREG
DV
LINEREG
/DV
IN
V
FB
I
FB
F
OSC
T
S
T
SD
T
HYS
EN
V
IL
V
IH
I
EN
Enable Threshold Low
Enable Threshold High
Enable Leakage Current
0.6
V
IN
= V
EN
= 5.5V
1.4
-1.0
1.0
V
V
µA
Description
Input Voltage
Output Voltage Range
UVLO Threshold
Output Voltage Tolerance
Quiescent Current
Shutdown Current
Current Limit
High Side Switch On-Resistance
Low Side Switch On-Resistance
Load Regulation
Line Regulation
Feedback Threshold Voltage Accuracy
(Adjustable Version)
FB Leakage Current
Internal Oscillator Frequency
Start-Up Time
Over-Temperature Shutdown Threshold
Over-Temperature Shutdown Hysteresis
Conditions
Min
2.4
0.6
Typ
Max
5.5
V
IN
2.4
Units
V
V
V
mV
V
%
µA
µA
A
W
W
%
%/V
V
µA
MHz
µs
°C
°C
V
IN
Rising
Hysteresis
V
IN
Falling
I
OUT
= 0A to 1.5A, V
IN
= 2.4V to 5.5V
No Load
V
EN
= GND
250
1.8
-3.0
42
1.8
0.120
0.085
0.5
0.2
0.591
1.12
0.60
1.4
150
140
15
0.609
0.2
1.68
3.0
90
1.0
I
LOAD
= 0A to 1.5A
V
IN
= 2.4V to 5.5V
No Load, T
A
= 25°C
V
OUT
= 1.0V
From Enable to Output Regulation
1. The AAT2158 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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2158.2008.10.1.5
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