UG036 Rev 0.00
Page 13 of 17
August 7, 2015
lSL8273MEVAL1Z
Typical Performance Data
The following data was acquired using a ISL8273MEVAL1Z evaluation board.
FIGURE 16. OUTPUT CURRENT MEASUREMENT ACCURACY AT
V
IN
= 12V, V
OUT
= 1V, T
A
= +25°C FOR VARIOUS
SWITCHING FREQUENCIES
FIGURE 17. OUTPUT CURRENT MEASUREMENT ACCURACY AT
V
IN
= 12V, V
OUT
= 1V, f
SW
= 300kHz FOR VARIOUS
AMBIENT TEMPERATURES
FIGURE 18. OUTPUT CURRENT MEASUREMENT ACCURACY AT
V
IN
= 12V, V
OUT
= 2.5V, T
A
= +25°C FOR VARIOUS
SWITCHING FREQUENCIES
FIGURE 19. OUTPUT CURRENT MEASUREMENT ACCURACY AT
V
IN
= 12V, V
OUT
= 2.5V, f
SW
= 571kHz FOR VARIOUS
AMBIENT TEMPERATURES
FIGURE 20. EFFICIENCY vs OUTPUT CURRENT AT V
IN
= 12V, FOR
VARIOUS OUTPUT VOLTAGES
FIGURE 21. EFFICIENCY vs SWITCHING FREQUENCY AT V
IN
= 12V,
I
OUT
= 70A FOR VARIOUS OUTPUT VOLTAGES
0
10
20
30
40
50
60
70
80
0
10
20
30
40
50
60
70
80
ACTUAL OUTPUT CURRENT (A)
READ_IOUT
300kHz
421kHz
533kHz
889kHz
0
10
20
30
40
50
60
70
80
0
10
20
30
40
50
60
70
80
ACTUAL OUTPUT CURRENT (A)
R
E
AD_IOUT
0°C
+25°C
+45°C
+65°C
0
10
20
30
40
50
60
70
80
0
10
20
30
40
50
60
70
80
ACTUAL OUTPUT CURRENT (A)
READ_IOUT
471kHz
571kHz
670kHz
889kHz
0
10
20
30
40
50
60
70
80
0
10
20
30
40
50
60
70
80
ACTUAL OUTPUT CURRENT (A)
READ_IOUT
0°C
+25°C
+45°C
+65°C
65
70
75
80
85
90
95
100
0
10
20
30
40
50
60
70
80
0.8V, 300kHz
1V, 300kHz
1.2V, 300kHz
1.5V, 346kHz
1.8V, 346kHz
2.5V, 530kHz
LOAD CURRENT (A)
EFFICIENCY (%
)
80
82
84
86
88
90
92
94
300
350
400
450
500
550
600
650
700
0.8V
1V
2.5V
1.2V
1.5V
1.8V
EFFICIE
N
CY
(
%
)
FREQUENCY (kHz)
