ACT4070
TYPICAL PERFORMANCE CHARACTERISTICS
(Circuit of Figure 3, unless otherwise specified.)
Efficiency vs. Output Current
Efficiency vs. Output Current
100
100
90
80
70
60
50
40
90
80
70
60
50
40
VIN = 8V
VIN = 8V
VIN = 12V
VIN = 30V
VIN = 30V
VIN = 12V
VIN = 20V
30
20
30
20
VIN = 20V
VOUT = 2.5V
L = 10µH
CIN = 22µF
COUT = 22µF
VOUT = 5V
L = 15µH
CIN = 22µF
COUT = 22µF
10
0
10
0
0.01
0.1
1
10
0.01
0.1
1
10
Output Current (A)
Output Current (A)
Feedback Voltage vs. Temperature
Switching Frequency vs. Input Voltage
500
450
400
1.27
1.25
1.23
1.21
1.19
1.17
350
300
8
-20
0
20
40
60
80
100
10 12 14 16 18 20 22 24 26 28 30
-40
Temperature (°C)
Input Voltage (V)
Surface Temperature vs. Output Current
Shutdown Supply Current vs. Input Voltage
18
140
120
100
80
VOUT = 5V
L = 15µH
CIN = 22µF
16
14
COUT = 22µF
VIN = 30V
12
10
8
VIN = 20V
60
6
40
20
0
4
VIN = 12V
2
0
30
0
3
5
10
15
20
25
0.5
1
1.5
2
2.5
Output Current (A)
Input Voltage (V)
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