1MHz 3A Step-Down DC/DC Converter
Typical Characteristics
Efficiency vs. Load Current
(V
IN
= 5V; V
OUT
= 3.3V)
100
95
AAT1154
R
DS(ON)
vs. Temperature
90
80
Efficiency (%)
90
V
IN
= 2.7V
V
IN
= 3.6V
V
IN
= 4.2V
R
DS(ON)
(mΩ)
85
80
75
70
65
60
0.01
0.1
1
10
70
60
50
40
-20
0
20
40
60
80
100
120
V
IN
= 5.5V
V
IN
= 5V
Output Current (A)
Temperature (°C)
Oscillator Frequency Variation vs.
Supply Voltage
0.5
70
65
R
DS(ON)
vs. V
IN
(I
DS
= 1A)
R
DS(ON)
(mΩ)
Ω
Variation (%)
0.25
60
55
50
45
40
0
-0.25
-0.5
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)
Oscillator Frequency Variation vs. Temperature
(V
IN
= 5V)
Enable Threshold (V)
1
0
1.2
1.1
1
0.9
0.8
0.7
0.6
-20
0
20
40
60
80
100
Enable Threshold vs. Input Voltage
EN(H)
Variation (%)
-1
-2
-3
-4
EN(L)
2.5
3
3.5
4
4.5
5
5.5
Temperature (°C)
Input Voltage (V)
1154.2006.09.1.6
5
ANALOGICTECH [ ADVANCED ANALOGIC TECHNOLOGIES ]
