ACT4501
Rev 2, 14-Nov-12
TYPICAL PERFORMANCE CHARACTERISTICS CONT’D
(Circuit of Figure 7, IISET = 1A, L = 82µH, CIN = 10µF, COUT = 22µF, TA = 25°C, unless otherwise specified.)
Standby Supply Current vs. Input Voltage
Shutdown Current vs. Input Voltage (EN pulled low)
140
5
4
3
2
1
0
120
100
80
60
40
20
0
5
10
15
20
25
30
5
15
25
35
Input Voltage (V)
Input Voltage (V)
SW vs. Output Voltage Ripples
Reverse Leakage Current (VIN Floating)
100
80
60
40
20
0
VIN = 12V
0UT = 5V
I0UT = 1A
V
CH1
CH2
CH1: VOUT, 50mV/div
CH2: VSW, 5V/div
TIME: 4µs/div
0
0.5
1
1.5
2
2.5
3
3.5
4
4.5
5
VOUT (V)
SW vs. Output Voltage Ripples
Start up with EN
VIN = 24V
V0UT = 5V
I0UT = 1A
VIN = 12V
V0UT = 5V
I0UT = 1A
CH1
CH1
CH2
CH2
CH1: EN, 1V/div
CH2: VOUT, 1V/div
TIME: 2ms/div
CH1: VOUT, 50mV/div
CH2: VSW, 10V/div
TIME: 4µs/div
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