ACT4012A
Rev0, 16-May-08
TYPICAL PERFORMANCE CHARACTERISTICS
(Circuit of Figure 3, unless otherwise specified.)
Efficiency vs. Load
100
95
90
95
90
ACT4012A-001
Efficiency vs. Load
ACT4012A-002
V
IN
= 8V
Efficiency (%)
85
80
75
70
65
60
55
0.1
0.3
0.5
0.7
0.9
V
OUT
= 5V
L= 22µH
C
OUT
= 22µF/cera
1.1
1.3
1.5
V
IN
= 12V
V
IN
= 20V
V
IN
= 8V
Efficiency (%)
85
80
V
IN
= 12V
75
V
IN
= 20V
70
65
60
0.1
0.3
0.5
0.7
0.9
1.1
1.3
1.5
V
OUT
= 3.3V
L= 15µH
C
OUT
= 22µF/cera
Load (A)
Load (A)
Surface Temperature vs. Load
100
5.4
5.2
ACT4012A-003
Output Voltage vs. Input Voltage
ACT4012A-004
I
OUT
= 0.5A
Surface Temperature (°C)
80
V
IN
= 12V
60
V
IN
= 20V
40
V
IN
= 8V
Output Voltage (V)
5.0
4.8
4.6
4.4
4.2
I
OUT
= 1A
I
OUT
= 1.5A
20
0.1
0.3
0.5
0.7
0.9
1.1
1.3
1.5
4.0
6
8
10
12
14
16
18
20
Load (A)
Input Voltage (V)
Feedback Voltage vs. Junction Temperature
Shutdown Supply current (µA)
1.30
25
ACT4012A-005
Shutdown Supply current vs. Input Voltage
ACT4012A-006
Feedback Voltage (V)
1.29
20
1.28
15
1.27
10
1.26
-40
0
40
80
120
5
0
12
16
20
Junction Temperature (°C)
Input Voltage (V)
Innovative Power
TM
-8-
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