sp6651a Exar Corporation, sp6651a Datasheet - Page 4

• Manufacturer Part Number: sp6651a
• Description: High Efficiency 800ma Synchronous Buck Regulator
• Manufacturer: Exar Corporation

Date: 5/25/04
Figure 1. Efficiency vs Load, V
Refer to the typical application schematic, T
Figure 3. Line/Load Rejection, V
Figure 5. No Load Battery Current, V
100
3.40
3.35
3.30
3.25
3.20
95
90
85
80
75
70
65
60
0.
500
400
300
200
100
0
0
3.0
200
1.0
3.3
400
ILoad (mA)
ILoad (mA)
10.0
Vin (V)
3.6
OUT
SP6651A High Efficiency 800mA Synchronous Buck Regulator
600
OUT
= 3.3V
= 3.3V
OUT
100.0
Tamb = -40°C
Tamb = 85°C
Tamb = 25°C
Vi=3.6V
Vi=3.9V
Vi=4.2V
3.9
Vi=5.0V
800
=3.3V
Vi=3.6V
Vi=3.9V
Vi=4.2V
Vi=5.0V
1000.0
1000
4.2
TYPICAL PERFORMANCE CHARACTERISTICS
AMB
= +27°C
4
Figure 4. Line/Load Rejection, V
Figure 2. Efficiency vs Load, V
Figure 6. No Load Battery Current, V
1.55
1.53
1.51
1.49
1.47
1.45
50
40
30
20
10
100
0
95
90
85
80
75
70
65
60
3.0
0
0.1
200
3.3
1.0
400
ILoad (mA)
ILoad (mA)
Vin (V)
© Copyright 2004 Sipex Corporation
3.6
10.0
600
OUT
OUT
= 1.5V
Tamb = 85°C
Tamb = 25°C
Tamb = -40°C
= 1.5V
100.0
Vi=3.6V
Vi=3.9V
Vi=4.2V
800
Vi=5.0V
3.9
OUT
Vi=3.6V
Vi=3.9V
Vi=4.2V
Vi=5.0V
=1.5V
1000
1000.0
4.2