850kHz 1A Buck DC/DC Converter
Typical Characteristics
Efficiency vs. Output Current
(V
OUT
= 1.5V)
100
80
170
AAT1152
High Side R
DS(ON)
vs. Temperature
2.7V
R
DS(ON)
(mΩ)
150
3.6V
2.7V
Efficiency (%)
60
130
110
90
70
-20
4.2V
40
20
0
10
100
1000
3.6V
4.2V
5.5V
0
20
40
60
80
100
120
Output Current (mA)
Temperature (°C)
Low Side R
DS(ON)
vs. Temperature
170
150
130
120
R
DS(ON)
vs. Input Voltage
R
DS(ON)
(mΩ)
R
DS(ON)
(mΩ)
High Side
110
100
90
80
2.5
3
3.5
4
4.5
5
5.5
130
110
90
70
-20
3.6V
2.7V
5.5V
4.2V
0
20
40
60
80
100
120
Low Side
Temperature (°C)
Input Voltage (V)
Enable Threshold vs. Input Voltage
1.2
3.5
Oscillator Frequency Variation vs.
Supply Voltage
Enable Threshold (V)
1.1
1
Variation (%)
V
EN(H)
2.5
1.5
0.5
-0.5
-1.5
0.9
0.8
V
EN(L)
0.7
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)
Supply Voltage (V)
1152.2006.09.1.7
5
ANALOGICTECH [ ADVANCED ANALOGIC TECHNOLOGIES ]
