isl6441 Intersil Corporation, isl6441 Datasheet - Page 9

• 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 11. PWM1 EFFICIENCY vs LOAD, VIN = 5V,
V
AC COUPLED
I
FIGURE 7. LOAD TRANSIENT RESPONSE VOUT1 (3.3V)
OUT1
OUT1
1A/DIV
100
200mV/DIV
90
80
70
FIGURE 9. PWM SOFT-START WAVEFORM
0
VOUT = 3.3V
0.5
V
OUT1
VCC_5V 1V/DIV
1
1V/DIV
LOAD CURRENT (A)
1.5
9
2
2.5
(Continued)
3
3.5
4
ISL6441
FIGURE 12. PWM2 EFFICIENCY vs LOAD, VIN = 5V,
FIGURE 10. OVERCURRENT HICCUP MODE OPERATION
V
AC COUPLED
V
FIGURE 8. LOAD TRANSIENT RESPONSE VOUT2 (3.3V)
I
SS1 2V/DIV
I
OUT2
OUT1
L1
OUT2
2A/DIV
100
200mV/DIV
1A/DIV
2V/DIV
90
80
70
0
VOUT = 3.3V
0.5
1
LOAD CURRENT (A)
1.5
2
2.5
3
3.5
October 4, 2005
FN9197.1
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