TPS54290 datasheet(6/33 Pages) TI

Part #	TPS54290

Description	1.5-A/2.5-A Dual, Fully-Synchronous Buck Converter With Integrated MOSFET

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0

–40

20

–25

35

–10

50

5

65

95 110 125

80

T

J – Junction Temperature – °C

0.2

0.4

1.2

0.6

1.4

0.8

1.0

f

SW = 600 kHz

f

SW = 1.2 MHz

f

SW = 300 kHz

2

0

–40

20

–25

35

–10

50

5

65

95 110 125

80

T

J – Junction Temperature – °C

3

1

5

6

4

f

SW = 300 kHz

f

SW = 600 kHz

f

SW = 1.2 MHz

2.00

–40

20

–25

35

–10

50

5

65

95 110 125

80

T

J – Junction Temperature – °C

2.25

2.75

4.25

3.25

4.50

3.75

Channel1

Channel2

2.50

3.00

3.50

4.00

–40

792

788

20

–25

35

–10

50

5

65

95 110 125

80

800

796

808

804

T

J – Junction Temperature – °C

790

798

794

806

802

TPS54290, TPS54291, TPS54292

SLUS973 – OCTOBER 2009

www.ti.com

TYPICAL PERFORMANCE CHARACTERISTICS (continued)

SOFT START TIME

OSCILLATOR FREQUENCY

vs

TEMPERATURE

Figure 5.

Figure 6.

FEEDBACK VOLTAGE

CURRENT LIMIT

vs

TEMPERATURE

Figure 7.

Figure 8.

6

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