PRODUCT DATASHEET
AAT1160
SwitchReg
TM
Typical Characteristics
N-Channel R
DS(ON)
vs. Temperature
120
100
80
60
40
20
0
-40
200
180
160
140
120
100
80
60
40
20
-15
10
35
60
85
0
-40
-15
10
35
60
85
12V, 3A Step-Down DC/DC Converter
P-Channel R
DS(ON)
vs. Temperature
(V
IN
= 6V)
Resistance (mΩ)
Ω
6V
Resistance (mΩ)
Ω
6V
12V
12V
Temperature (°C)
Temperature (°C)
Switching Frequency vs. Temperature
Switching Frequency (Hz)
810
Line Transient
(V
OUT
= 5.0V; C
FF
= 100pF; V
IN
= 7.6V to 11V;
I
OUT
= 3A; C
IN
= 10µF; C
OUT
= 22µF; L = 3.8µH)
Output Current (bottom) (A)
12
5.30
5.25
5.20
5.15
5.10
5.05
5.00
4.95
4.90
Input Voltage (top) (V)
10
35
60
85
805
800
795
790
785
780
775
770
-40
-15
11
10
9
8
7
6
5
4
6V
12V
Temperature (°C)
Time (100µs/div)
(V
OUT
= 5.0V; C
FF
= 100pF; R
LOAD
= 1.67Ω;
Ω
C
IN
= 10µF; C
OUT
= 22µF; L = 3.8µH)
Enable Voltage (top) (V)
Output Voltage (top) (V)
6
5
4
3
2
1
0
6
5.5
5
4.5
4
3.5
3
Start-Up Time
Load Transient
(V
OUT
= 5.0V; C
FF
= 100pF; I
OUT
= 1A to 3A;
C
IN
= 10µF; C
OUT
= 22µF; L = 3.8µH)
9
8
7
6
Load and Inductor Current
(bottom) (A)
Input Current (bottom) (A)
V
EN
V
OUT
5
4
3
2
I
LOAD
I
LX
5
4
3
2
1
I
LOAD
1
0
Time (500µs/div)
Time (100µs/div)
1160.2007.11.1.1
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