ISL6443A Intersil Corporation, ISL6443A Datasheet - Page 9

• 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 11. PWM1 EFFICIENCY vs LOAD (3.3V), V
V
AC-COUPLED
I
OUT1
FIGURE 7. LOAD TRANSIENT RESPONSE V
OUT1
1A/DIV
100
200mV/DIV
90
80
70
60
FIGURE 9. PWM SOFT-START WAVEFORM
0
V
OUT1
VCC_5V 1V/DIV
1
1V/DIV
LOAD CURRENT (A)
9
2
(Continued)
3
OUT1
IN
(3.3V)
= 12V
4
ISL6443A
FIGURE 12. PWM2 EFFICIENCY vs LOAD (3.3V), V
FIGURE 10. OVERCURRENT HICCUP MODE OPERATION
V
AC-COUPLED
V
I
SS1 2V/DIV
I
FIGURE 8. LOAD TRANSIENT RESPONSE V
OUT2
OUT1
L1
OUT2
2A/DIV
100
200mV/DIV
1A/DIV
2V/DIV
90
80
70
60
0
1
LOAD CURRENT (A)
2
3
OUT2
December 7, 2007
IN
(3.3V)
= 12V
FN6600.1
4