TYPICAL PERFORMANCE CHARACTERISTICS
Refer to the typical application schematic, T
AMB
= +27°C
100
95
90
100
95
90
Efficiency (%)
Vi=3.6V
Vi=3.9V
Vi=4.2V
Vi=5.0V
1.0
10.0
ILoad (mA)
100.0
1000.0
Efficiency (%)
85
80
75
70
65
60
0.
85
80
75
70
65
60
0.1
Vi=3.6V
Vi=3.9V
Vi=4.2V
Vi=5.0V
1.0
10.0
ILoad (mA)
100.0
1000.0
Figure 1. Efficiency vs Load, V
OUT
= 3.3V
Figure 2. Efficiency vs Load, V
OUT
= 1.5V
3.40
Vi=3.6V
Vi=3.9V
Vi=4.2V
Vi=5.0V
1.55
Vi=3.6V
Vi=3.9V
Vi=4.2V
Vi=5.0V
3.35
Vout (V)
1.53
1.51
3.30
Vout (V)
1.49
3.25
1.47
3.20
0
200
400
600
ILoad (mA)
800
1000
1.45
0
200
400
600
800
1000
ILoad (mA)
Figure 3. Line/Load Rejection, V
OUT
= 3.3V
Figure 4. Line/Load Rejection, V
OUT
= 1.5V
500
Tamb = 85°C
Tamb = 25°C
Tamb = -40°C
400
50
Tamb = 85°C
Tamb = 25°C
Tamb = -40°C
40
Iin (uA)
Iin (µA)
300
30
200
20
100
10
0
3.0
3.3
3.6
Vin (V)
3.9
4.2
0
3.0
3.3
3.6
Vin (V)
3.9
4.2
Figure 5. No Load Battery Current, V
OUT
=3.3V
Figure 6. No Load Battery Current, V
OUT
=1.5V
Date: 2/1/05
SP6654 High Efficiency 800mA Synchronous Buck Regulator
© Copyright 2005 Sipex Corporation
5
SIPEX [ SIPEX CORPORATION ]
