AAT1140 Datasheet, PDF (6/19 Pages) Advanced Analogic Technologies – Fast Transient 600mA Step-Down Converter

SwitchReg^TM
Typical Characteristics
Soft Start
(V_IN = 3.6V; V_OUT = 1.8V; Load = 3Ω)
8.0
1.4
7.0
EN
1.2
6.0
1.0
5.0
V_OUT
0.8
4.0
0.6
3.0
I_IN
0.4
2.0
0.2
1.0
0.0
Time (100μs/div)
Output Voltage Error vs. Temperature
(V_IN = 3.6V; V_O = 1.8V; I_OUT = 400mA)
2.0
1.0
0.0
-1.0
-2.0
-40
-20
0
20
40
60
Temperature (°C)
80
100
Frequency vs. Input Voltage
2.0
1.0 _{VOUT = 1.8V}
0.0
-1.0
V_OUT = 2.5V
V_OUT = 3.3V
-2.0
-3.0
-4.0
2.7
3.1
3.5
3.9
4.3
4.7
5.1
5.5
Input Voltage (V)
PRODUCT DATASHEET
AAT1140
Fast Transient 600mA Step-Down Converter
Line Regulation
(V_OUT = 1.8V)
0.40
0.30
0.20
I_OUT = 10mA
0.10
0.00
-0.10
-0.20
-0.30
I_OUT = 1mA
I_OUT = 400mA
-0.40
2.5
3.0
3.5
4.0
4.5
5.0
5.5
6.0
Input Voltage (V)
Switching Frequency vs. Temperature
(V_IN = 3.6V; V_OUT = 1.8V)
15.0
12.0
9.0
6.0
3.0
0.0
-3.0
-6.0
-9.0
-12.0
-15.0
-40
-20
0
20
40
60
80
100
Temperature (°C)
No Load Quiescent Current vs. Input Voltage
(V_OUT = 3.0V, L = 6.8µH)
60
55
T_A = 85°C
50
T_A = 25°C
45
40
35
30
25
T_A = -40°C
20
3.3
3.8
4.3
4.8
5.3
Input Voltage (V)
6
www.analogictech.com
1140.2007.12.1.1