NCP1597A datasheet(6/13 Pages) ONSEMI

Part #	NCP1597A

Description	1 MHz, 2.0 A Synchronous Buck Regulator

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NCP1597A

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6

TYPICAL OPERATING CHARACTERISTICS

Figure 9. Load Regulation for VOUT = 3.3 V

Figure 10. Efficiency vs. Output Current for

VOUT = 3.3 V

Figure 11. Load Regulation for VOUT = 1.8 V

Figure 12. Efficiency vs. Output Current for

VOUT = 1.8 V

Figure 13. Load Regulation for VOUT = 1.2 V

1.10

1.12

1.14

1.16

1.18

1.20

1.22

1.0

2.0

VIN = 4.0 V

VIN = 5.0 V

20

40

50

60

70

80

90

100

0.01

0.1

1

10

0

IOUT, OUTPUT CURRENT (A)

VIN = 5.0 V

VIN = 4.0 V

Figure 14. Efficiency vs. Output Current for

VOUT = 1.2 V

1.24

1.26

1.28

1.30

0.2 0.4 0.6 0.8

1.2 1.4

1.70

1.72

1.74

1.76

1.78

1.80

1.82

1.0

2.0

VIN = 4.0 V

VIN = 5.0 V

0

IOUT, OUTPUT CURRENT (A)

1.84

1.86

1.88

1.90

0.2 0.4 0.6 0.8

1.2 1.4

3.20

3.22

3.24

3.26

3.28

3.30

3.32

1.0

2.0

VIN = 4.0 V

VIN = 5.0 V

0

IOUT, OUTPUT CURRENT (A)

3.34

3.36

3.38

3.40

0.2 0.4 0.6 0.8

1.2 1.4

30

20

40

50

60

70

80

90

100

0.01

0.1

1

10

IOUT, OUTPUT CURRENT (A)

VIN = 5.0 V

VIN = 4.0 V

30

20

40

50

60

70

80

90

100

0.01

0.1

1

10

IOUT, OUTPUT CURRENT (A)

VIN = 5.0 V

VIN = 4.0 V

30

VOUT = 1.2 V

L = 3.3 mH

COUT = 2 x 22 mF

VOUT = 1.8 V

L = 3.3 mH

COUT = 2 x 22 mF

VOUT = 3.3 V

L = 3.3 mH

COUT = 2 x 22 mF

VOUT = 3.3 V

L = 3.3 mH

COUT = 2 x 22 mF

VOUT = 1.8 V

L = 3.3 mH

COUT = 2 x 22 mF

VOUT = 1.2 V

L = 3.3 mH

COUT = 2 x 22 mF

1.6 1.8

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