sp6651a Exar Corporation, sp6651a Datasheet - Page 6

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

Figure 13. V
Figure 17. Start up from SHDN, I
Date: 5/25/04
Figure 15. Load Step, I
Refer to the typical application schematic, T
IN
Start up, I
OUT
OUT
=0.4A to 0.8A, V
=0.6A, V
SP6651A High Efficiency 800mA Synchronous Buck Regulator
OUT
OUT
=0.6A, V
TYPICAL PERFORMANCE CHARACTERISTICS: Continued
=3.3V
OUT
=3.3V
OUT
CH.2=V
50mV/div. AC
CH.4=I
0.5A/div
CH.1=V
10V/div.
CH.2=V
1V/div. AC
CH.4=ILx
0.5A/div
CH.1=V
2.5V/div
CH.2=V
2.0V/div
CH.4=I
0.5A/div
=3.3V
OUT
IN
OUT
SHDN
OUT
IN
OUT
AMB
= +27°C
6
Figure 14. V
Figure 18. Start up from SHDN, I
Figure 16. Load Step, I
IN
Start up, I
OUT
OUT
=0.4A to 0.8A, V
=0.6A, V
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OUT
OUT
=0.6A, V
=1.5V
OUT
=1.5V
OUT
CH.1=V
2.5V/div
CH.2=V
5.0V/div
CH.4=I
0.5A/div
CH.1=V
10V/div.
CH.2=V
2V/div. AC
CH.4=ILx
0.5A/div
CH.2=V
50mV/div. AC
CH.4=I
0.5A/div
=1.5V
IN
IN
IN
OUT
SHDN
OUT
OUT