TPS54917 datasheet(7/21 Pages) TI1

부품명	TPS54917

상세설명	3-V TO 4-V INPUT, 9-A, SMALL SYNCHRONOUS-BUCK SWITCHER WITH INTEGRATED FETs (SWIFT??

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TYPICAL CHARACTERISTICS

0

5

10

15

20

25

−40

0

25

85

125

VI = 3.3 V

IO = 5 A

TJ − Junction Temperature − °C

0

5

10

15

20

25

−40

0

25

85

125

VI = 3.6 V

IO = 9 A

TJ − Junction Temperature − °C

LRds

HRds

250

−40

0

25

85

125

TJ − Junction Temperature − °C

SYNC

≥ 2.5 V

SYNC

≤ 0.8 V

350

450

550

650

750

0.885

0.887

0.889

0.891

0.893

0.895

−40

0

25

85

125

TJ − Junction Temperature − °C

I

L

− LoadCurrent − A

0

0.5

1

1.5

2

2.5

3

3.5

4

0

1

2

3

4

6

7

8

9

V

I =3.3V,

T =125 C

J

o

5

400

−40

0

25

85

125

TJ − Junction Temperature − °C

1400

1600

1800

1200

1000

800

600

RT = 100 k

Ω

RT = 27 k

Ω

−20

0

20

40

60

80

100

120

140

1

100

1 k

1 M

−200

−180

−160

−140

−120

−100

−80

−60

−40

−20

0

10

10 k

100 k

10 M

f − Frequency − Hz

Phase

Gain

RL = 10 kΩ,

CL = 160 pF,

TA = 25°C

0.885

0.887

0.889

0.891

0.893

0.895

3

3.1

3.2

3.3

3.4

3.5

3.6

VI − Input Voltage − V

2.75

−40

0

25

85

125

TJ − Junction Temperature − °C

3.50

3.65

3.80

3.35

3.20

3.05

2.90

TPS54917

www.ti.com ........................................................................................................................................................................................... SLVS847 – NOVEMBER 2008

DRAIN-SOURCE

INTERNALLY SET

ON-STATE RESISTANCE

OSCILLATOR FREQUENCY

vs

JUNCTION TEMPERATURE

Figure 1.

Figure 2.

Figure 3.

EXTERNALLY SET

OSCILLATOR FREQUENCY

VOLTAGE REFERENCE

DEVICE POWER LOSSES

vs

JUNCTION TEMPERATURE

LOAD CURRENT

Figure 4.

Figure 5.

Figure 6.

ERROR AMPLIFIER

INTERNAL SLOW-START TIME

OUTPUT VOLTAGE REGULATION

vs

INPUT VOLTAGE

OPEN LOOP RESPONSE

JUNCTION TEMPERATURE

Figure 7.

Figure 8.

Figure 9.

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