ISL6443A Intersil Corporation, ISL6443A Datasheet - Page 8

• Manufacturer Part Number: ISL6443A
• Description: Step-Down PWM and Single Linear Controller
• Manufacturer: Intersil Corporation

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Typical Performance Curves
(Oscilloscope Plots are Taken Using the ISL6443A EVAL Evaluation Board, VIN = 12V Unless Otherwise Noted.)
FIGURE 3. REFERENCE VOLTAGE VARIATION OVER
I
V
L1
PHASE1 10V/DIV
OUT1
0.5A/DIV, AC-COUPLED
3.40
3.39
3.38
3.37
3.36
3.35
3.34
3.33
3.32
3.31
3.30
0.85
0.84
0.83
0.82
0.81
0.80
0.79
0.78
0.77
0.76
0.75
20mV/DIV, AC-COUPLED
-40
FIGURE 1. PWM1 LOAD REGULATION
0
TEMPERATURE
FIGURE 5. PWM1 WAVEFORMS
0.5
-20
1.0
LOAD CURRENT (A)
1.5
TEMPERATURE (°C)
0
8
2.0
20
2.5
40
3.0
3.5
60
4.0
80
4.5
ISL6443A
I
PGOOD 5V/DIV
V
V
V
V
L2
PHASE2 10V/DIV
OUT3
OUT1
OUT2
OUT2
FIGURE 4. SOFT-START WAVEFORMS WITH PGOOD
0.5A/DIV, AC-COUPLED
3.40
3.39
3.38
3.37
3.36
3.35
3.34
3.33
3.32
3.31
3.30
20mV/DIV, AC-COUPLED
2V/DIV
2V/DIV
2V/DIV
FIGURE 2. PWM2 LOAD REGULATION
0
FIGURE 6. PWM2 WAVEFORMS
0.5
1.0
LOAD CURRENT (A)
1.5
2.0
2.5
3.0
3.5
December 7, 2007
4.0
FN6600.1
4.5