5

Date: 9/25/06 Rev C

SP6659 1.5MHz, 600mA Synchronous Buck Regulator

© 2006 Sipex Corporation

Figure 17: Efficiency Vs. Load Current, Vout =1.2V

Figure 15: Efficiency Vs. Load Current, Vout =1.5V

Figure 13: Efficiency Vs. Load Current, Vout =2.5V

2.5Vout Efficiency Vs Output Current

40

50

60

70

80

90

100

1

10

100

1000

Output Current (mA)

Vin=2.7V

Vin=3.3V

Vin=4.2V

Figure 18: Load Regulation Vout =1.2V

1.2Vout Load Regulation

1.190

1.200

1.210

1.220

1.230

0

100

200

300

400

500

600

700

Output Current (mA)

Vin=4.2V

Vin=3.3V

Vin=2.7V

1.5Vout Load Regulation

1.480

1.490

1.500

1.510

1.520

0

100

200

300

400

500

600

700

Output Current (mA)

Vin=4.2V

Vin=3.3V

Vin=2.7V

2.5Vout Load Regulation

2.480

2.490

2.500

2.510

2.520

0

100

200

300

400

500

600

700

Output Current (mA)

Vin=4.2V

Vin=3.3V

Vin=2.7V

Figure 16: Load Regulation Vout =1.5V

Figure 14: Load Regulation Vout =2.5V

TYPICAL PERFORMANCE CHARACTERISTICS

1.5Vout Efficiency Vs Output Current

40

50

60

70

80

90

100

1

10

100

1000

Output Current (mA)

Vin=2.7V

Vin=3.3V

Vin=4.2V

1.2Vout Efficiency Vs Output Current

40

50

60

70

80

90

100

1

10

100

1000

Output Current (mA)

Vin=2.7V

Vin=3.3V

Vin=4.2V