sp6651a Exar Corporation, sp6651a Datasheet - Page 5

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

Date: 5/25/04
Figure 7. K
Figure 11. Ripple Frequency vs. V
V
Refer to the typical application schematic, T
Figure 9. K
OUT
=3.3V
700.0
600.0
500.0
400.0
300.0
200.0
100.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0.0
0.0
3.6
3.6
3.5
ON
OFF
vs V
vs V
3.9
3.9
IN
IN
, V
, V
4.2
OUT
4.2
4.0
OUT
=3.3V
Vin (V)
=3.3V
Vin (V)
Vin (V)
4.5
4.5
SP6651A High Efficiency 800mA Synchronous Buck Regulator
4.8
4.8
4.5
IN
, I
TYPICAL PERFORMANCE CHARACTERISTICS: Continued
Vout = 3.3V
Measured
Vout = 3.3V
Calculated
OUT
5.1
5.1
=600mA,
5.4
5.4
5.0
AMB
= +27°C
5
Figure 10. K
Figure 12. Ripple Frequency vs. V
V
Figure 8. K
OUT
=1.5V
700.0
600.0
500.0
400.0
300.0
200.0
100.0
0.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0.0
3.0
3.4
3.0
ON
OFF
3.3
vs V
3.3
vs V
3.6
IN
3.8
3.6
, V
IN
, V
3.9
OUT
3.9
OUT
Vin (V)
=1.5V
4.2
Vin (V)
© Copyright 2004 Sipex Corporation
Vin (V)
=1.5V
4.2
4.2
4.5
4.5
IN
4.8
, I
4.6
4.8
Vout = 1.5V
Vout = 1.5V
Measured
Calculated
OUT
5.1
=600mA,
5.1
5.4
5.0
5.4