SP6654EU datasheet(6/17 Pages) EXAR

6 / 17 page

Date: 2/1/05

SP6654 High Efficiency 800mA Synchronous Buck Regulator

0.0

0.5

1.0

1.5

2.0

2.5

3.0

3.5

3.6

3.9

4.2

4.5

4.8

5.1

5.4

Vin (V)

0.0

0.5

1.0

1.5

2.0

2.5

3.0

3.5

3.0

3.3

3.6

3.9

4.2

4.5

4.8

5.1

5.4

Vin (V)

0.0

0.5

1.0

1.5

2.0

2.5

3.0

3.5

3.6

3.9

4.2

4.5

4.8

5.1

5.4

Vin (V)

0.0

0.5

1.0

1.5

2.0

2.5

3.0

3.5

3.0

3.3

3.6

3.9

4.2

4.5

4.8

5.1

5.4

Vin (V)

Figure 7. K

ON vs VIN, VOUT=3.3V

Figure 8. K

ON vs VIN, VOUT=1.5V

Figure 9. K

OFF vs VIN, VOUT=3.3V

Figure 10. K

OFF vs VIN, VOUT=1.5V

TYPICAL PERFORMANCE CHARATERISTICS

Refer to the typical application schematic, TAMB= +27°C

0.0

100.0

200.0

300.0

400.0

500.0

600.0

700.0

3.5

4.0

4.5

5.0

Vin (V)

Vout = 3.3V

Measured

Vout = 3.3V

Calculated

0.0

100.0

200.0

300.0

400.0

500.0

600.0

700.0

3.4

3.8

4.2

4.6

5.0

Vin (V)

Vout = 1.5V

Measured

Vout = 1.5V

Calculated

Figure 11. Ripple Frequency vs. V

IN, IOUT=600mA,

OUT=3.3V

Figure 12. Ripple Frequency vs. V

IN, IOUT=600mA,

OUT=1.5V

SP6654EU Datasheet(PDF) 6 Page - Exar Corporation

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