ISL8225M
Typical Performance Characteristics
Efficiency Performance
T = +25°C, if not specified, as shown in Figure 18 with 2nd phase disabled. The efficiency equation is
A
as follows:
P
(V
xI
)
Output Power
Input Power
OUT
OUT OUT
-----------------------------------------
---------------
--------------------------------------
=
Efficiency =
=
P
(V xI
)
IN
IN IN
100
95
90
85
80
75
70
65
60
55
50
100
95
3.3V
1.8V
2.5V AT 500kHz
3.3V AT 650kHz
1.2V AT 500kHz
2.5V
1.5V
5V AT 850kHz
90
85
1V
1.2V
80
1.5V AT 500kHz
1.8V AT 500kHz
75
70
65
60
55
50
1V AT 500kHz
0
2
4
6
8
10
12
14
16
0
2
4
6
8
10
12
14
16
LOAD CURRENT (A)
LOAD CURRENT (A)
FIGURE 3. EFFICIENCY vs LOAD CURRENT (5V AT 500kHz)
IN
FIGURE 4. EFFICIENCY vs LOAD CURRENT (12V )
IN
100
100
95
90
85
80
75
70
2.5V
OUT
1.8V
2.5V AT 500kHz
95
90
85
80
75
70
65
60
55
50
OUT
3.3V AT 650kHz
5V AT 900kHz
1.5V
OUT
1.2V
OUT
1.8V AT 500kHz
1V
OUT
1.5V AT 500kHz
1.2V AT 500kHz
1V AT 500kHz
0
2
4
6
8
10
12
14
16
0
5
10
15
20
25
30
LOAD CURRENT (A)
LOAD CURRENT (A)
FIGURE 5. EFFICIENCY vs LOAD CURRENT (20V
)
FIGURE 6. EFFICIENCY vs LOAD CURRENT (PARALLEL SINGLE
OUTPUT, AS SHOWN IN FIGURE 19 AT 5V /500kHz)
IN
IN
95
1.8V
1.5V
OUT
2.5V
OUT
90
85
80
75
70
65
60
OUT
1.2V
OUT
1V
OUT
0
5
10
15
20
25
30
LOAD CURRENT (A)
FIGURE 7. EFFICIENCY vs LOAD CURRENT (PARALLEL SINGLE OUTPUT, AS SHOWN IN FIGURE 19 AT 12V /500kHz
IN
FN7822.1
January 31, 2013
9
INTERSIL [ Intersil ]
