isl9444 Intersil Corporation, isl9444 Datasheet - Page 13

• Manufacturer Part Number: isl9444
• Manufacturer: Intersil Corporation

Typical Performance Curves of ISL9444
Evaluation Board, V
FIGURE 8. SWITCHING FREQUENCY vs TEMPERATURE (R
100
100
90
80
70
60
50
40
30
20
10
90
80
70
60
50
40
30
20
10
FIGURE 10. PWM1 EFFICIENCY AND LOAD REGULATION
FIGURE 12. PWM2 EFFICIENCY AND LOAD REGULATION
0
0
0.01
0.01
650
630
610
590
570
550
-40
-20
IN
VOUT2 (V)
VOUT1 (V)
EFFICIENCY DEM (%)
= 12V, VOUT1 = 1.05V, VOUT2 = 3.3V, VOUT3 = 1.8V unless otherwise noted.
0.1
0.1
LOAD CURRENT (A)
0
LOAD CURRENT (A)
EFFICIENCY CCM (%)
EFFICIENCY CCM (%)
TEMPERATURE (°C)
EFFICIENCY DEM (%)
13
20
40
1
1
60
80
T
10
10
= 49.9kΩ)
1.055
1.051
1.047
1.043
1.039
1.035
3.300
3.296
3.292
3.288
3.284
3.280
100
ISL9444
FIGURE 11. PWM1 INPUT CURRENT COMPARISON WITH
FIGURE 13. PWM2 INPUT CURRENT COMPARISON WITH
10.000
1.000
0.100
0.010
0.001
1.000
0.100
0.010
0.001
720
710
700
690
680
FIGURE 9. REFERENCE VOLTAGE vs TEMPERATURE
Oscilloscope plots are taken using the ISL9444EVAL1Z
-40
0.01
0.01
MODE = CCM/DEM
MODE = CCM/DEM
-20
(Continued)
CCM
CCM
DEM
0
DEM
TEMPERATURE (°C)
0.1
LOAD CURRENT (A)
0.1
LOAD CURRENT (A)
20
40
1
1
60
80
May 23, 2011
FN7665.0
100
10
10