NCP6354_12 datasheet(7/15 Pages) ONSEMI

Part #	NCP6354

Description	3MHz, 2A Fixed-Frequency Synchronous Buck Converter

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NCP6354

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TYPICAL OPERATING CHARACTERESTICS

0

10

20

30

40

50

60

70

80

90

100

0

500

1000

1500

2000

Figure 9. Efficiency vs. Output Current and

Input Voltage (VOUT = 3.3 V, TA = 255C)

IOUT, OUTPUT CURRENT (mA)

VIN = 3.6 V

VIN = 5.5 V

0

10

20

30

40

50

60

70

80

90

100

0

500

1000

1500

2000

IOUT, OUTPUT CURRENT (mA)

Figure 10. Efficiency vs. Output Current and

Input Voltage (VOUT = 4 V, TA = 255C)

VIN = 4.5 V

VIN = 5.5 V

1.78

1.79

1.8

1.81

1.82

0

200 400 600 800 1000 1200 1400 1600 1800 2000

IOUT, OUTPUT CURRENT (mA)

VIN = 3.6 V

VIN = 5.5 V

VIN = 2.7 V

Figure 11. Load Regulation vs. Output Current

and Input Voltage (VOUT = 1.8 V, TA = 255C)

1.78

1.79

1.8

1.81

1.82

0

200 400 600 800 1000 1200 1400 1600 1800 2000

TA = −40°C

TA = 25°C

TA = 85°C

IOUT, OUTPUT CURRENT (mA)

Figure 12. Load Regulation vs. Output Current

and Temperature (VIN = 3.6 V, VOUT = 1.8 V)

Figure 13. Output Ripple Voltage (VIN = 3.6 V,

VOUT = 1.8 V, IOUT = 1 A, L=1.0 mH, COUT = 10 mF)

Figure 14. Load Transient Response (VIN = 3.6 V, VOUT

= 1.8 V, IOUT = 500 mA to 1500 mA, L = 1.0 mH,

COUT = 10 mF)

VOUT

5 mV/Div

3 mV

SW

2 V/Div

Time: 200 ns/Div

−70 mV

VOUT

100 mV/Div

100 mV

500 mA

1500 mA

IOUT 1 A/Div

SW 2 V/Div

Time: 20 ms/Div

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