201998B • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • March 20, 2013
DATA SHEET
AAT1162
12V, 1.5A Step-Down DC/DC Converter
Absolute Maximum Ratings
1
Symbol
V
IN,
V
AIN
V
LX
V
FB
V
EN
T
J
Description
Input Voltage
LX to GND Voltage
FB to GND Voltage
EN to GND Voltage
Operating Junction Temperature Range
Value
-0.3 to 14
-0.3 to V
IN
+ 0.3
-0.3 to V
IN
+ 0.3
-0.3 to V
IN
+ 0.3
-40 to 150
Units
V
V
V
V
°C
Thermal Information
3
Symbol
P
D
JA
Description
Maximum Power Dissipation
4
Thermal Resistance
Value
2.7
37
Units
W
°C/W
1. Stresses above those listed in Absolute Maximum Ratings may cause permanent damage to the device. Functional operation at conditions other than the operating conditions
specified is not implied. Only one Absolute Maximum Rating should be applied at any one time.
201998B • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • March 20, 2013
3
DATA SHEET
AAT1162
12V, 1.5A Step-Down DC/DC Converter
Electrical Characteristics
1
4.0V < V
IN
< 13.2V. C
IN
= C
OUT
= 22μF; L = 2.2 or 3.8μH, T
A
= -40°C to +85°C, unless otherwise noted. Typical values
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
I
LIM
I
LXLEAK
T
SD
T
HYS
V
IL
V
IH
I
EN
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
Over-Temperature Shutdown Threshold
Over-Temperature Shutdown Hysteresis
EN Logic Low Input Threshold
EN Logic High Input Threshold
EN Input Current
Conditions
Rising
Hysteresis
No Load
V
EN
= GND
Min
4.0
Typ
Max
13.2
4.0
Units
V
V
μA
μA
V
%
%/V
%
0.3
150
0.6
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
Adjustable Version
V
OUT
= 1.2V
Fixed Version
-2.5
0.023
0.4
0.59
0.60
2
0.8
200
100
2
0.12
0.15
0.06
0.08
90
6.0
300
1
0.94
V
IN
2.5
0.100
0.61
0.2
1
94
V
μA
MHz
kHz
%
ns
ms
%
A
μA
°C
°C
V
V
μA
0.6
V
IN
V
IN
V
IN
V
IN
V
IN
=
=
=
=
=
12V
6V
12V
6V
12V, V
OUT
= 5V, I
OUT
= 1.5A
4.0
V
IN
= 13.2V, V
LX
= 0 to V
IN
140
25
1
0.4
V
EN
= 0V, V
EN
= 13.2V
1.4
-1.0
1.0
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 correla-
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