5
AN1288.1
October 30, 2008
Transient Performance
Figures 7, 8, and 9 show the response of the output when
subjected to transient loading from 0A to 15A at 1A/µs.
Efficiency
ISL8105BEVAL1Z, ISL8105BEVAL2Z based regulators
enable the design of highly efficient systems. The efficiency
of the evaluation board using a 12V input supply is shown in
Figure 10.
References
For Intersil documents available on the web, go to
http://www.intersil.com/.
1. ISL8105, ISL8105B Data Sheet, FN6306, “+5V or +12V
Single-Phase Synchronous Buck Converter PWM
Controller with Integrated MOSFET Gate Drivers”, Intersil
Corporation
2. Tech Brief TB417, “Designing Stable Compensation
Networks for Single Phase Voltage Mode Buck
Regulators”, Intersil Corporation
FIGURE 7. TRANSIENT RESPONSE
IL
VOUT
FIGURE 8. TRANSIENT RESPONSE
FIGURE 9. TRANSIENT RESPONSE
FIGURE 10. EVALUATION BOARD EFFICIENCY (V
OUT
= 1.8V)
50
55
60
65
70
75
80
85
90
95
10 11 12 13 14 15
LOAD CURRENT (A)
EFFIC
IENCY (%)
0
1
2
3
4
5
6
7
8
9
FIGURE 11. EVALUATION BOARD LINE REGUALTION
1.790
1.792
1.794
1.796
1.798
1.800
OUTPUT CURRENT (A)
O
U
TPUT VO
LTAG
E
(V)
10 11 12 13 14 15
0
1
2
3
4
5
6
7
8
9
Application Note 1288
