TYPICAL PERFORMANCE CHARATERISTICS
Refer to the typical application schematic, T
AMB
= +27°C
3.5
3.0
2.5
3.5
3.0
2.5
Kon (V*usec)
Kon (V*usec)
2.0
1.5
1.0
0.5
0.0
3.6
2.0
1.5
1.0
0.5
3.9
4.2
4.5
Vin (V)
4.8
5.1
5.4
0.0
3.0
3.3
3.6
3.9
4.2 4.5
Vin (V)
4.8
5.1
5.4
Figure 7. K
ON
vs V
IN
, V
OUT
=3.3V
Figure 8. K
ON
vs V
IN
, V
OUT
=1.5V
3.5
3.0
2.5
Koff (V*usec)
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0.0
3.6
Koff (V*usec)
2.0
1.5
1.0
0.5
3.9
4.2
4.5
Vin (V)
4.8
5.1
5.4
0.0
3.0
3.3
3.6
3.9
4.2
Vin (V)
4.5
4.8
5.1
5.4
Figure 9. K
OFF
vs V
IN
, V
OUT
=3.3V
Figure 10. K
OFF
vs V
IN
, V
OUT
=1.5V
700.0
700.0
600.0
600.0
500.0
500.0
Frequency (KHz)
400.0
Frequency (KHz)
400.0
300.0
300.0
200.0
Vout = 3.3V
Measured
Vout = 3.3V
Calculated
4.0
Vin (V)
4.5
5.0
200.0
Vout = 1.5V
Measured
Vout = 1.5V
Calculated
3.4
3.8
4.2
Vin (V)
4.6
5.0
100.0
100.0
0.0
3.5
0.0
Figure 11. Ripple Frequency vs. V
IN
, I
OUT
=600mA,
V
OUT
=3.3V
Figure 12. Ripple Frequency vs. V
IN
, I
OUT
=600mA,
V
OUT
=1.5V
Date: 2/1/05
SP6654 High Efficiency 800mA Synchronous Buck Regulator
© Copyright 2005 Sipex Corporation
6
SIPEX [ SIPEX CORPORATION ]
