isl9444 Intersil Corporation, isl9444 Datasheet - Page 14

• Manufacturer Part Number: isl9444
• Manufacturer: Intersil Corporation

Typical Performance Curves of ISL9444
Evaluation Board, V
100
90
80
70
60
50
40
30
20
10
0
FIGURE 14. PWM3 EFFICIENCY AND LOAD REGULATION
FIGURE 16. PWM1 START-UP. MODE = CCM, LOAD = 0A
FIGURE 18. PWM2 START-UP. MODE = CCM, LOAD = 0A
0.01
TIME @ 5ms/DIV
TIME @ 5ms/DIV
IN
EFFICIENCY DEM (%)
= 12V, VOUT1 = 1.05V, VOUT2 = 3.3V, VOUT3 = 1.8V unless otherwise noted.
0.1
LOAD CURRENT (A)
14
INDUCTOR CURRENT @ 1A/DIV
INDUCTOR CURRENT @ 2A/DIV
EFFICIENCY CCM (%)
1
PGOOD1 @ 5V/DIV
PGOOD2 @ 5V/DIV
VOUT1 @ 1V/DIV
ENSS1 @ 2V/DIV
VOUT3 (V)
VOUT2 @ 2V/DIV
TKSS2 @ 2V/DIV
10
1.796
1.800
1.798
1.794
1.790
1.792
ISL9444
FIGURE 15. PWM3 INPUT CURRENT COMPARISON WITH
FIGURE 19. PWM2 START-UP. MODE = DEM, LOAD = 0A
10.000
FIGURE 17. PWM1 START-UP. MODE = DEM, LOAD = 0A
1.000
0.100
0.010
0.001
TIME @ 5ms/DIV
TIME @ 5ms/DIV
Oscilloscope plots are taken using the ISL9444EVAL1Z
0.01
MODE = CCM/DEM
(Continued)
CCM
DEM
0.1
LOAD CURRENT (A)
INDUCTOR CURRENT @ 1A/DIV
INDUCTOR CURRENT @ 1A/DIV
PGOOD2 @ 5V/DIV
PGOOD1 @ 5V/DIV
VOUT2 @ 2V/DIV
VOUT1 @ 1V/DIV
ENSS1 @ 2V/DIV
TKSS2 @ 2V/DIV
1
May 23, 2011
FN7665.0
10