ACT4088
Rev 1, 14-Feb-11
TYPICAL PERFORMANCE CHARACTERISTICS
(Circuit of Figure 2, V
IN
= 12V, L = 4.7µH, C1 = 10µF, C2 = 22µF, T
A
= +25°C, unless otherwise specified.)
Efficiency vs. Load Current
95
V
IN
= 12V
95
ACT4088-001
Efficiency vs. Load Current
ACT4088-002
85
85
V
IN
= 12V
Efficiency (%)
75
V
IN
= 18V
V
IN
= 24V
Efficiency (%)
75
V
IN
= 24V
V
IN
= 18V
65
65
55
50
0.1
1
V
OUT
= 5V
10
55
50
0.1
1
V
OUT
= 3.3V
10
Load Current (A)
Load Current (A)
FB Voltage vs. Temperature
820
1.60
Oscillator Frequency vs. Temperature
Oscillator Frequency (MHz)
ACT4088-003
ACT4088-004
816
FB Voltage (mV)
1.50
812
1.40
808
804
1.30
800
-40
-20
0
20
40
60
80
100
120
1.20
-40
-20
0
20
40
60
80
100
120
Temperature (°C)
Temperature (°C)
Peak Current Limit vs. Duty Cycle
Quiescent Supply Current (µA)
3.0
30
25
20
15
10
5
0
0
ACT4088-005
Shutdown Current vs. Input Voltage
ACT4088-006
Peak Current Limit (A)
2.5
2.0
1.5
1.0
0.5
0.0
0
20
40
60
80
100
S
ent
urr
ly C
upp
EN Pull-up Current
4
8
12
16
20
24
28
Duty Cycle
Input Voltage (V)
Innovative Power
TM
-4-
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