Fast Transient 800mA Step-Down Converter
Typical Characteristics
Line Response
(V
OUT
= 1.8V @ 800mA)
Output Voltage (AC coupled)
(top) (mV)
1.86
1.84
1.82
1.80
1.78
1.76
1.74
1.72
1.70
1.68
1.66
7.6
7.1
6.6
20
10
0
-10
-20
-30
-40
-50
-60
AAT1110
Output Ripple
(V
IN
= 3.6V; V
OUT
= 1.8V; I
OUT
= 800mA)
1.3
1.2
Inductor Current
(bottom) (A)
Output Voltage
(top) (V)
6.1
5.6
5.1
4.6
4.1
3.6
3.1
2.6
1.1
1.0
0.9
0.8
0.7
0.6
0.5
Input Voltage
(bottom) (V)
Time (50µs/div)
Time (500ns/div)
Output Ripple
(V
IN
= 3.6V; V
OUT
= 1.8V; I
OUT
= 1mA)
P-Channel R
DS(ON)
vs. Input Voltage
0.30
0.25
Output Voltage (AC coupled)
(top) (mV)
40
20
0
-20
-40
-60
-80
-100
-120
750
700
650
120°C
100°C
Inductor Current
(bottom) (A)
R
DS(ON)
(mΩ)
Ω
0.20
0.15
0.10
0.05
0.00
-0.05
-0.10
600
550
500
450
400
350
300
2.5
3.0
3.5
4.0
4.5
5.0
5.5
6.0
25°C
85°C
Time (10µs/div)
Input Voltage (V)
N-Channel R
DS(ON)
vs. Input Voltage
750
700
650
120°C
R
DS(ON)
(mΩ)
Ω
100°C
600
550
500
450
400
350
300
2.5
3.0
3.5
4.0
4.5
5.0
5.5
6.0
25°C
85°C
Input Voltage (V)
8
1110.2006.04.1.0
ANALOGICTECH [ ADVANCED ANALOGIC TECHNOLOGIES ]
