AAT1157
1MHz 1.2A Buck DC/DC Converter
Typical Characteristics
No Load Supply Current vs. Input Voltage
300
2.0
DC Regulation
(V
OUT
= 2.5V)
V
IN
= 3.6V
1.0
85°C
Supply Current (µA)
µ
Output Error (%)
250
200
150
100
50
0
2.5
0.0
-1.0
-2.0
-3.0
-4.0
3
3.5
4
4.5
5
5.5
1
10
V
IN
= 3.0V
V
IN
= 3.3V
25°C
-40°C
100
1000
10000
Input Voltage (V)
Output Current (mA)
P-Channel R
DSON
vs. Input Voltage
200
180
160
200
180
N-Channel R
DSON
vs. Input Voltage
100°C
120°C
R
DSON
(mΩ)
Ω
160
140
120
100
80
60
40
20
0
100°C
120°C
R
DSON
(mΩ)
Ω
140
120
100
80
60
40
20
0
2.5
3
3.5
4
4.5
5
5.5
85°C
25°C
85°C
25°C
2.5
3
3.5
4
4.5
5
5.5
Input Voltage (V)
Input Voltage (V)
Output Voltage vs. Temperature
(V
IN
= 3.6V; V
OUT
= 2.5V; I
OUT
= 1.0A)
0.1
1.3
1.28
1.26
1.24
1.22
1.2
2.7
Frequency vs. Input Voltage
(V
OUT
= 1.8V)
Output Voltage Error (%)
0
-0.1
-0.2
-0.3
-0.4
-0.5
-0.6
-0.7
-40
-20
0
20
40
60
80
100
Frequency (MHz)
3.1
3.5
3.9
4.3
4.7
5.1
5.5
°
Temperature (°C)
Input Voltage (V)
1157.2005.11.1.4
5
ANALOGICTECH [ ADVANCED ANALOGIC TECHNOLOGIES ]
