AIC1570
FAULT
0 to 400mA Load Step
SS
Over Load
Applied
Inductor Current
10A/div
V
OUT2
FIG. 6 Over-Current Operation on Inductor
FIG. 7 Transient Response of Linear Regulator
V
OUT1
V
OUT3
(
2mV/div
)
2.0V
DC
5A to 12A Load Step
1A to 2A Load Step
FIG. 8 Transient Response of PWM Output
90
80
70
FIG. 9 Transient Response of Linear Controller
100
DACOUT=2.0V
TA=25°C
95
90
Power MOSFET : CEB6030L
Vo=2.8V
Number of Parts
Efficiency (%)
60
50
40
30
20
10
0 -0.5 -0.4 -0.3 -0.2 -0.1 0.0
0.1
0.2
0.3 0.4
0.5
0.6
0.7
85
80
75
70
65
V
IN
=5V
Switching Frequency = 200KHz
0
2
4
6
8
10
12
Vo=2V
Vo=1.3V
14
16
18
20
FIG. 9 DACOUT Voltage Accuracy (%)
FIG.10 Efficiency vs. Load Current (A)
6