LM2743 datasheet(5/37 Pages) TI

Numer części	LM2743

Szczegółowy opis	LM2743 Low Voltage N-Channel MOSFET Synchronous Buck Regulator Controller

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Producent	TI [Texas Instruments]

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TEMPERATURE (

oC)

-40 -25 -10 5

80 95 110 125

20 35 50 65

9.3

9.4

9.5

9.6

9.7

9.8

9.9

10

TEMPERATURE (

oC)

-40 -25 -10 5

80 95 110 125

20 35 50 65

5.9

6

6.1

6.2

6.3

6.4

6.5

6.6

6.7

0.05

0.25

0.45

0.65

0.85

FREQUENCY (MHz)

1.05

0

6

13

19

25

20

30

40

50

60

70

80

90

100

VIN = 12V

VIN = 5V

0.0 0.4 0.8 1.2 1.6 2.0 2.4 2.8 3.2 3.6 4.0

OUTPUT CURRENT (A)

0.0 0.4 0.8 1.2 1.6 2.0 2.4 2.8 3.2 3.6 4.0

OUTPUT CURRENT (A)

20

30

40

50

60

70

80

90

100

VIN = 3.3V

VIN = 12V

VIN = 5V

20

30

40

50

60

70

80

90

100

VIN = 3.3V

VIN = 12V

VIN = 5V

0.0 0.4 0.8 1.2 1.6 2.0 2.4 2.8 3.2 3.6 4.0

OUTPUT CURRENT (A)

LM2743

www.ti.com

SNVS276G – APRIL 2004 – REVISED MARCH 2013

Typical Performance Characteristics

Efficiency (VOUT = 1.2V)

Efficiency (VOUT = 2.5V)

VCC = 3.3V, fSW = 300 kHz

Figure 3.

Figure 4.

VCC Operating Current plus BOOT Current

vs

Efficiency (VOUT = 3.3V)

Frequency

VCC = 5V, fSW = 300 kHz

FDS6898A FET (TA = 25°C)

Figure 5.

Figure 6.

BOOT Pin Current

vs

Temperature for BOOT Voltage = 3.3V

Temperature for BOOT Voltage = 5V

fSW = 300 kHz, FDS6898A FET, No-Load

Figure 7.

Figure 8.

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