Dual 400mA, 1MHz Step-Down DC-DC Converter
Typical Channel Characteristics
Load Transient Response
(30mA - 300mA; V
IN
= 3.6V; V
OUT
= 1.8V; C1 = 4.7μF)
μ
2.0
1.9
1.4
1.2
1.0
300mA
30mA
0.8
0.6
0.4
0.2
0.0
-0.2
1.90
1.85
AAT2510
Line Transient
(V
OUT
= 1.8V @ 400mA)
7.0
6.5
6.0
5.5
5.0
4.5
4.0
3.5
3.0
Load and Inductor Current
(200mA/div) (bottom)
Output Voltage
(top) (V)
1.8
1.7
1.6
1.5
1.4
1.3
1.2
Output Voltage
(top) (V)
1.80
1.75
1.70
1.65
1.60
1.55
1.50
Input Voltage
(bottom) (V)
Time (25μs/div)
Time (25μs/div)
μ
Line Regulation
(V
OUT
= 1.8V)
0.1
0.05
0
-0.05
-0.1
-0.15
-0.2
-0.25
-0.3
-0.35
2.5
3.0
3.5
4.0
4.5
5.0
5.5
6.0
4.0
3.0
2.0
1.0
0.0
-1.0
-2.0
-3.0
-4.0
Soft Start
(V
IN
= 3.6V; V
OUT
= 1.8V; 400mA)
Enable and Output Voltage
(top) (V)
3.5
3.0
I
OUT
= 100mA
Accuracy (%)
Inductor Current
(bottom) (A)
2.5
2.0
1.5
1.0
0.5
0.0
-0.5
I
OUT
= 10mA
I
OUT
= 400mA
Input Voltage (V)
250μs/div
μ
Output Ripple
(V
IN
= 3.6V; V
OUT
= 1.8V; 400mA)
Output Voltage (AC Coupled)
(top) (mV)
40
20
0
-20
-40
-60
-80
-100
-120
0.9
0.8
Inductor Current
(bottom) (A)
0.7
0.6
0.5
0.4
0.3
0.2
0.1
Time (250ns/div)
2510.2006.05.1.10
7
ANALOGICTECH [ ADVANCED ANALOGIC TECHNOLOGIES ]
