TPS54372 datasheet(7/21 Pages) TI1

Part #	TPS54372

Description	3-A OUTPUT TRACKING/TERMINATION SYNCHRONOUS PWM SWITCHER WITH INTEGRATED FETs

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Manufacturer	TI1 [Texas Instruments]

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TYPICAL CHARACTERISTICS

0

20

40

60

80

100

120

−40

0

25

85

125

VIN = 3.3 V

IO = 3 A

TJ − Junction Temperature − °C

250

350

450

550

650

750

−40

0

25

85

125

TJ − Junction Temperature − °C

RT = Open

0

10

20

30

40

50

60

70

80

90

−40

0

25

85

125

VIN = 5 V

IO = 3 A

TJ − Junction Temperature − °C

0

0.25

0.5

0.75

1

1.25

1.5

1.75

2

2.25

0

1

2

3

4

IL − Load Current − A

TJ − 125°C

fs = 700 kHz

VI = 3.3 V

VI = 5 V

200

300

400

500

600

700

800

−40

0

25

85

125

TJ − Junction Temperature − °C

RT = 68 k

Ω

RT = 100 k

Ω

RT = 180 k

Ω

2.75

2.90

3.05

3.20

3.35

3.50

3.65

−40

0

25

85

125

TJ − Junction Temperature − °C

3.80

−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

TPS54372

SLVS430D – JUNE 2002 – REVISED FEBRUARY 2005

DRAIN-SOURCE

INTERNALLY SET

ON-STATE RESISTANCE

OCILLATOR FREQUENCY

vs

JUNCTION TEMPERATURE

Figure 1.

Figure 2.

Figure 3.

EXTERNALLY SET

OCILLATOR FREQUENCY

DEVICE POWER LOSSES

INTERNAL SLOW-START TIME

vs

JUNCTION TEMPERATURE

LOAD CURRENT

JUNCTION TEMPERATURE

Figure 4.

Figure 5.

Figure 6.

ERROR AMPLIFIER

OPEN-LOOP RESPONSE

Figure 7.

7

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