Sept12-06 SP7651 Evaluation Manual ©2006 Sipex Corporation
Page 3 of 8
Efficiency vs Load Current
40
50
60
70
80
90
100
0.0
0.5
1.0
1.5
2.0
2.5
3.0
Load current (A)
E
ff
ic
ie
n
c
y
(
%
)
Output Voltage vs Load Current
3.280
3.290
3.300
3.310
3.320
0.0
0.5
1.0
1.5
2.0
2.5
3.0
Load current (A)
O
u
tp
u
t
V
o
lt
a
g
e
(
V
)
Figure 1. Efficiency vs Load
Figure 2. Load Regulation
Figure 3. Load Step Response: 1.5->3A
Figure 4. Load Step Response: 0->3A
Figure 5. Start-Up Response: No Load
Figure 6. Start-Up Response: 3A Load
Vout
Vin
SoftStart
Ichoke (0.5A/div)
Iout (2A/div)
Vout
Iout (1A/div)
Vout
Vout
Vin
SoftStart
Ichoke (2A/div)
Vi=12V
Vo=3.3V
Vi=12V
Vo=3.3V
Vi=12V
Vo=3.3V
Vi=12V
Vo=3.3V
Vi=12V
Vo=3.3V
Vi=12V
Vo=3.3V