PRODUCT DATASHEET
AAT1162
SwitchReg
TM
Typical Characteristics
Test circuit of Figure 2, unless otherwise specified.
12V, 1.5A Step-Down DC/DC Converter
Line Transient
(V
OUT
= 5.0V; C
FF
= 100pF; V
IN
= 7.6V to 11V;
I
OUT
= 1.5A; C
IN
= 10µF; C
OUT
= 22µF; L = 3.8µH)
12
5.30
5.25
5.20
5.15
5.10
5.05
5.00
4.95
4.90
3.6
Load Transient
(V
OUT
= 3.3V; C
FF
= 100pF; C
OUT
= 66µF)
Output Voltage (bottom) (V)
Load and Inductor Current
(bottom) (1A/div)
Output Voltage (top) (V)
3.4
3.2
3
2.8
2.6
2.4
2.2
2
10mA
1.5A
Input Voltage (top) (V)
11
10
9
8
7
6
5
4
Time (100µs/div)
Time (50µs/div)
Load Transient
(V
OUT
= 3.3V; C
OUT
= 66µF; No C
FF
)
3.6
5.4
Load Transient
(V
OUT
= 5V; C
FF
= 100pF; C
OUT
= 66µF)
Load and Inductor Current
(bottom) (1A/div)
Load and Inductor Current
(bottom) (1A/div)
Output Voltage (top) (V)
5.1
4.8
4.5
4.2
3.9
3.6
3.3
3
10mA
1.5A
Output Voltage (top) (V)
3.4
3.2
3
2.8
2.6
2.4
2.2
2
10mA
1.5A
Time (50µs/div)
Time (50µs/div)
Load Transient
(V
OUT
= 5V; C
OUT
= 66µF; No C
FF
)
5.4
V
OUT
vs. Temperature
(V
OUT
= 3.3V; I
LOAD
= 1.5A)
Output Voltage Difference (%)
1
0.8
0.6
0.4
0.2
0
-0.2
-0.4
-0.6
-0.8
-40 -30 -20 -10
0
10
20
30
40
50
60
70
80
90
Load and Inductor Current
(bottom) (1A/div)
Output Voltage (top) (V)
5.1
4.8
4.5
4.2
3.9
3.6
3.3
3
10mA
1.5A
Time (50µs/div)
Temperature (°C)
1162.2008.01.1.3
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