ISL6420 Datasheet, PDF (9/19 Pages) Intersil Corporation – Advanced Single Synchronous Buck Pulse-Width Modulation (PWM) Controller

ISL6420
Typical Performance Curves
0.604
320
0.602
310
0.6
0.598
0.596
0.594
-40
-15
10
35
60
85
TEMPERATURE (°C)
FIGURE 1. VREF vs TEMPERATURE
300
290
280
270
-40
-15
10
35
60
85
TEMPERATURE (°C)
FIGURE 2. V_SW vs TEMPERATURE
1.15
1.05
0.95
0.85
-40
-15
10
35
60
85
TEMPERATURE (°C)
FIGURE 3. IOCSET vs TEMPERATURE
98
96
V_IN = 5V
94
92
V_IN = 12V
90
88
86
84
82
80
0 1 2 3 4 5 6 7 8 9 10
LOAD (A)
FIGURE 4. EFFICIENCY vs LOAD CURRENT (VOUT = 3.3V)
FIGURE 5. PWM WAVEFORMS
9
FIGURE 6. LOAD TRANSIENT RESPONSE
FN9151.4
July 18, 2005