SP6654EU datasheet(5/17 Pages) EXAR

5 / 17 page

Date: 2/1/05

SP6654 High Efficiency 800mA Synchronous Buck Regulator

100

0.1

1.0

10.0

100.0

1000.0

ILoad (mA)

Vi=3.6V

Vi=3.9V

Vi=4.2V

Vi=5.0V

3.20

3.25

3.30

3.35

3.40

200

400

600

800

1000

ILoad (mA)

Vi=3.6V

Vi=3.9V

Vi=4.2V

Vi=5.0V

100

200

300

400

500

3.0

3.3

3.6

3.9

4.2

Vin (V)

Tamb = 85°C

Tamb = 25°C

Tamb = -40°C

1.45

1.47

1.49

1.51

1.53

1.55

200

400

600

800

1000

ILoad (mA)

Vi=3.6V

Vi=3.9V

Vi=4.2V

Vi=5.0V

3.0

3.3

3.6

3.9

4.2

Vin (V)

Tamb = 85°C

Tamb = 25°C

Tamb = -40°C

100

1.0

10.0

100.0

1000.0

ILoad (mA)

Vi=3.6V

Vi=3.9V

Vi=4.2V

Vi=5.0V

Figure 1. Efficiency vs Load, V

OUT = 3.3V

Figure 2. Efficiency vs Load, V

OUT = 1.5V

Figure 3. Line/Load Rejection, V

OUT = 3.3V

Figure 4. Line/Load Rejection, V

OUT = 1.5V

Figure 5. No Load Battery Current, V

OUT=3.3V

Figure 6. No Load Battery Current, V

OUT=1.5V

TYPICAL PERFORMANCE CHARACTERISTICS

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

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