AAT1162
12V, 1.5A Step-Down DC/DC Converter
Electrical Characteristics
1
4.0V < V
IN
< 13.2V. C
IN
= C
OUT
= 22µF; L = 4.7µH, T
A
= -40°C to +85°C, unless otherwise noted. Typical val-
ues are at T
A
= 25°C.
Symbol
V
IN
V
UVLO
I
Q
I
SHDN
V
OUT
V
OUT
∆V
OUT
/
V
OUT
/∆V
IN
∆V
OUT
/
I
OUT
V
FB
I
FBLEAK
F
OSC
DC
T
ON
T
S
R
DS(ON)H
R
DS(ON)L
η
I
LIM
I
LXLEAK
Description
Input Voltage Range
Input Under-Voltage Lockout
Supply Current
Shutdown Current
Output Voltage Range
Output Voltage Accuracy
Line Regulation
Load Regulation
Feedback Reference Voltage
(adjustable version)
FB Leakage Current
PWM Oscillator Frequency
Foldback Frequency
Maximum Duty Cycle
Minimum Turn-On Time
Soft-Start Time
P-Channel On Resistance
N-Channel On Resistance
Efficiency
PMOS Current Limit
LX Leakage Current
Conditions
Rising
Hysteresis
No Load
V
EN
= GND
I
OUT
= 0A to 1.5A
V
IN
= 4.5V to 13.2V
V
IN
= 12V, V
OUT
= 5V,
I
OUT
= 0A to 1.5A
No Load, T
A
= 25°C
V
OUT
= 1.2V
Adjustable Version
Fixed Version
Min
4.0
Typ
Max
13.2
4.0
Units
V
V
µA
µA
V
%
%/V
%
0.3
115
0.6
-2.5
0.023
0.4
0.59
0.60
200
1
0.94 V
IN
2.5
0.100
0.61
0.2
V
µA
MHz
kHz
%
ns
µs
Ω
Ω
%
A
µA
0.6
2
0.8
200
100
200
0.12
0.15
0.06
0.08
93
3.0
1
94
V
IN
V
IN
V
IN
V
IN
V
IN
=
=
=
=
=
12V
6V
12V
6V
12V, V
OUT
= 5V, I
OUT
= 1.5A
2.0
V
IN
= 13.2V, V
LX
= 0 to V
IN
1
1. The AAT1162 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.
4
1162.2007.09.1.2
ANALOGICTECH [ ADVANCED ANALOGIC TECHNOLOGIES ]
