isl6441 Intersil Corporation, isl6441 Datasheet - Page 8

• Manufacturer Part Number: isl6441
• Description: 1.4mhz Dual, 180? Out-of-phase, Step-down Pwm And Single Linear Controller
• Manufacturer: Intersil Corporation

Typical Performance Curves
Oscilloscope Plots are Taken Using the ISL6441AEVAL Evaluation Board, VIN = 12V, Unless Otherwise Noted.
FIGURE 3. REFERENCE VOLTAGE VARIATION OVER
I
V
PHASE1 10V/DIV
L1
OUT1
0.5A/DIV, AC COUPLED
3.39
3.38
3.37
3.36
3.35
3.33
3.32
3.31
0.85
0.84
0.83
0.82
0.81
0.79
0.78
0.77
0.75
3.34
0.76
3.4
3.3
20mV/DIV, AC COUPLED
0.8
-40
FIGURE 1. PWM1 LOAD REGULATION
0
TEMPERATURE
FIGURE 5. PWM1 WAVEFORMS
0.5
-20
1
LOAD CURRENT (A)
TEMPERATURE (°C)
1.5
0
8
2
20
2.5
40
3
3.5
60
4
80
4.5
ISL6441
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
3.39
3.38
3.37
3.36
3.35
3.34
3.33
3.32
3.31
2V/DIV
2V/DIV
2V/DIV
3.4
3.3
20mV/DIV, AC COUPLED
FIGURE 2. PWM2 LOAD REGULATION
0
FIGURE 6. PWM2 WAVEFORMS
0.5
1
LOAD CURRENT (A)
1.5
2
2.5
3
3.5
October 4, 2005
4
FN9197.1
4.5