AAT1123
1MHz Step-Down Converter
Typical Characteristics
Load Transient Response
(30mA - 300mA; VIN = 3.6V; VOUT = 1.5V; C1 = 22μμF)
Load Transient Response
(30mA - 300mA; VIN = 3.6V; VOUT = 2.5V; C1 = 22μμF)
1.65
2.65
2.55
1.5
1.5
1.3
1.60
1.55
1.3
1.50
1.1
1.1
1.45
300mA
2.45
300mA
1.40
0.9
0.9
30mA
30mA
1.35
2.35
0.7
0.7
1.30
1.25
0.5
0.5
2.25
1.20
0.3
0.1
-0.1
1.15
1.10
1.05
1.00
0.3
2.15
2.05
0.1
-0.1
Time (25μs/div)
Time (25μs/div)
Line Transient
(VOUT = 2.5V @ 500mA)
Line Regulation
(VOUT = 1.5V)
2
1.5
1
2.60
2.55
2.50
2.45
2.40
2.35
2.30
2.25
2.20
2.15
7.0
6.5
6.0
5.5
5.0
4.5
4.0
3.5
3.0
IOUT = 600mA
0.5
0
IOUT = 100mA
IOUT = 10mA
-0.5
-1
2.5
3
3.5
4
4.5
5
5.5
6
Time (25μμs/div)
Input Voltage (V)
Soft Start
(VIN = 3.6V; VOUT = 1.5V; L = 4.7μμH)
Output Ripple
(VIN = 3.6V; VOUT = 1.8V; 400mA)
4.0
3.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0.0
-0.5
40
20
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
2.0
0
1.0
-20
-40
-60
-80
-100
-120
0.0
-1.0
-2.0
-3.0
-4.0
Time (50μs/div)
Time (250ns/div)
1123.2006.05.1.5
7
ANALOGICTECH [ ADVANCED ANALOGIC TECHNOLOGIES ]
