ISL6445 Datasheet, PDF (6/15 Pages) Intersil Corporation – 1.4MHz Dual, 180 Out-of-Phase, Step-Down PWM Controller

ISL6445
Typical Performance Curves Oscilloscope plots are taken using the ISL6445EVAL Evaluation Board.
3.40
3.39
3.38
3.37
3.36
3.35
3.34
3.33
3.32
3.31
3.30
0
0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5
LOAD CURRENT (A)
FIGURE 1. PWM1 LOAD REGULATION
3.40
3.39
3.38
3.37
3.36
3.35
3.34
3.33
3.32
3.31
3.30
0
0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5
LOAD CURRENT (A)
FIGURE 2. PWM2 LOAD REGULATION
0.85
0.84
0.83
0.82
0.81
0.80
0.79
0.78
0.77
0.76
0.75
-40 -20
0
20
40
60
80
TEMPERATURE (°C)
FIGURE 3. REFERENCE VOLTAGE VARIATION OVER
TEMPERATURE
PGOOD 5V/DIV
V_OUT3 2V/DIV
V_OUT2 2V/DIV
V_OUT1 2V/DIV
FIGURE 4. SOFT-START WAVEFORMS WITH PGOOD
V_OUT1 20mV/DIV, AC COUPLED
I_L1 0.5A/DIV, AC COUPLED
PHASE1 10V/DIV
V_OUT2 20mV/DIV, AC COUPLED
I_L2 0.5A/DIV, AC COUPLED
PHASE2 10V/DIV
FIGURE 5. PWM1 WAVEFORMS
6
FIGURE 6. PWM2 WAVEFORMS
FN9230.1
June 3, 2008