ISL6443
Typical Performance Curves
(Oscilloscope Plots are Taken Using the ISL6443EVAL Evaluation Board, VIN = 12V Unless Otherwise Noted.)
3.4
PWM1 OUTPUT VOLTAGE (V)
PWM2 OUTPUT VOLTAGE (V)
0.5
1.5
2
3
4
4.5
3.39
3.38
3.37
3.36
3.35
3.34
3.33
3.32
3.31
3.3
3.4
3.39
3.38
3.37
3.36
3.35
3.34
3.33
3.32
3.31
3.3
0
1
2.5
3.5
0
0.5
1
1.5
2
2.5
3
3.5
4
4.5
LOAD CURRENT (A)
LOAD CURRENT (A)
FIGURE 1. PWM1 LOAD REGULATION
FIGURE 2. PWM2 LOAD REGULATION
0.85
0.84
REFERENCE VOLTAGE (V)
0.83
0.82
0.81
0.8
0.79
0.78
0.77
0.76
0.75
-40
-20
20
40
0
TEMPERATURE (°C)
60
80
PGOOD 5V/DIV
V
OUT3
2V/DIV
V
OUT2
2V/DIV
V
OUT1
2V/DIV
FIGURE 3. REFERENCE VOLTAGE VARIATION OVER
TEMPERATURE
FIGURE 4. SOFT-START WAVEFORMS WITH PGOOD
V
OUT1
20mV/DIV, AC COUPLED
V
OUT2
20mV/DIV, AC COUPLED
I
L1
0.5A/DIV, AC COUPLED
I
L2
0.5A/DIV, AC COUPLED
PHASE1 10V/DIV
PHASE2 10V/DIV
FIGURE 5. PWM1 WAVEFORMS
FIGURE 6. PWM2 WAVEFORMS
8
FN9044.1
October 4, 2005
INTERSIL [ INTERSIL CORPORATION ]
