AAT1157
1MHz 1.2A Buck DC/DC Converter
Typical Characteristics
No Load Supply Current vs. Input Voltage
DC Regulation
(VOUT = 2.5V)
2.0
300
85°C
VIN = 3.6V
1.0
250
200
VIN = 3.0V
VIN = 3.3V
0.0
-1.0
-2.0
-3.0
-4.0
25°C
150
-40°C
100
50
0
1
10
100
1000
10000
2.5
3
3.5
4
4.5
5
5.5
Input Voltage (V)
Output Current (mA)
P-Channel RDSON vs. Input Voltage
N-Channel RDSON vs. Input Voltage
200
200
180
160
140
120
100
80
180
160
140
120
100
80
100°C
25°C
120°C
100°C
120°C
85°C
85°C
25°C
60
60
40
40
20
20
0
0
2.5
3
3.5
4
4.5
5
5.5
2.5
3
3.5
4
4.5
5
5.5
Input Voltage (V)
Input Voltage (V)
Output Voltage vs. Temperature
(VIN = 3.6V; VOUT = 2.5V; IOUT = 1.0A)
Frequency vs. Input Voltage
(VOUT = 1.8V)
0.1
0
1.3
1.28
1.26
1.24
1.22
1.2
-0.1
-0.2
-0.3
-0.4
-0.5
-0.6
-0.7
-40
-20
0
20
40
60
80
100
2.7
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 ]
