isl9440b Intersil Corporation, isl9440b Datasheet - Page 15

• Manufacturer Part Number: isl9440b
• Description: Triple Step-down Pwm And Single Linear Controller With Programmable Soft-start
• Manufacturer: Intersil Corporation

Typical Performance Curves
(Oscilloscope Plots are Taken Using the ISL9440BEVAL1Z Evaluation Board, V
FIGURE 30. SOFT-START CURRENT vs TEMPERATURE
5.25
5.20
5.15
5.10
5.05
5.00
4.95
4.90
4.85
4.80
4.75
2.55
2.54
2.53
2.52
2.51
2.50
2.49
2.48
2.47
2.46
2.45
1.8
1.7
1.6
1.5
1.4
1.3
1.2
1.1
1.0
0.9
0.8
-50
-50
0
FIGURE 32. VCC_5V vs TEMPERATURE
FIGURE 28. LDO LOAD REGULATION
V
IN
V
VSS = 0V, V
IN
-25
= 24V
VSS = 2V, V
= 12.0V/0A LOAD
0.2
V
IN
= 19.0V/0A LOAD
V
IN
0
TEMPERATURE (°C)
IN
0
TEMPERATURE (°C)
LOAD CURRENT (A)
V
= 4.5V
IN
= 12V
IN
0.4
= 12V
15
= 12V
25
0.6
VSS = 1.3V, V
50
50
(Continued)
0.8
75
IN
ISL9440B, ISL9440C
= 12V
100
100
1.0
IN
FIGURE 29. LDO LOAD TRANSIENT
FIGURE 31. SWITCHING FREQUENCY vs TEMPERATURE
= 19V Unless Otherwise Noted).
FIGURE 33. SHUTDOWN CURRENT vs TEMPERATURE
360
340
320
300
280
260
240
220
200
80
78
76
74
72
70
68
66
64
62
60
-50
-50
V
IN
(LOAD STEP FROM 0.1A TO 0.6A)
= 12V
V
IN
V
OUT
V
= 19V/0A LOAD
I
TEMPERATURE (°C)
STEP
IN
(AC), 20mV/DIV
0
= 12V/0A LOAD
0
TEMPERATURE (°C)
, 0.5A/DIV
50
50
100
µs
January 15, 2009
/DIV
FN6799.0
100
100