AAT1147 AAT, AAT1147 Datasheet - Page 7

• Manufacturer Part Number: AAT1147
• Description: Step-Down Converter
• Manufacturer: AAT

Typical Characteristics
1147.2006.05.1.0
220
210
200
190
180
170
160
150
140
130
120
1.90
1.85
1.80
1.75
1.70
1.65
1.60
1.55
1.50
1.45
1.40
2.0
1.9
1.8
1.7
1.6
1.5
1.4
1.3
1.2
1.1
1.0
2.5
No-Load Quiescent Current
Line Transient Response
3.0
(40mA to 400mA; V
V
(V
OUT
vs. Input Voltage
Line Response
OUT
85°C
Time (25µs/div)
Time (25µs/div)
3.5
= 1.8V; C
Input Voltage (V)
400mA
= 1.8V @ 400mA)
25°C
4.0
1
= 4.7µF)
IN
= 3.6V;
4.5
-40°C
40mA
5.0
5.2
5.0
4.8
4.6
4.4
4.2
4.0
3.8
3.6
3.4
3.2
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0.0
-0.2
-0.4
-0.6
High Efficiency, Low Noise, Fast Transient
5.5
-0.8
-1.6
-2.4
2.0
1.9
1.8
1.7
1.6
1.5
1.4
1.3
1.2
1.1
1.0
5.6
4.8
4.0
3.2
2.4
1.6
0.8
0.0
-100
-120
-20
-40
-60
-80
40
20
0
400mA Step-Down Converter
(40mA to 400mA; V
(V
(V
IN
IN
Line Transient Response
= 3.6V; V
= 3.6V; V
C
1
= 4.7µF; C
Output Ripple
Time (500ns/div)
Time (25µs/div)
Time (25µs/div)
400 mA
Soft Start
OUT
OUT
= 1.8V; I
= 1.8V; I
IN
= 3.6V; V
FF
= 100pF)
OUT
OUT
= 400mA)
= 400mA)
OUT
40 mA
= 1.8V;
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0.0
-0.2
-0.4
-0.6
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
3.6
3.2
2.8
2.4
2.0
1.6
1.2
0.8
0.4
0.0
-0.4
7