TPS54377RHFRG4 datasheet(11/21 Pages) TI

Part #	TPS54377RHFRG4

Description	1.6 MHz, 3-V TO 6-V INPUT, 3-A SYNCHRONOUS STEP-DOWN SWIFT??CONVERTER WITH DISABLED SINKING DURING START-UP

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Manufacturer	TI [Texas Instruments]

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PERFORMANCE GRAPHS

−60

−20

−40

−50

−10

−30

0

20

10

40

30

50

60

10

100

1k

10k

100k

1M

−180

−120

−60

0

60

120

180

f − Frequency − Hz

Phase

GAIN

80

0

0.5

1

1.5

2

2.5

85

100

3

3.5

90

95

75

I − OutputCurrent

O

− A

V =3V

I

V =6V

I

V =5V

I

V =4V

I

-0.2

0

0.5

1

1.5

2

2.5

-0.1

0.3

3

0.1

0

0.2

-0.3

I − OutputCurrent

O

− A

1ms/div

V =20mV/div

(ACCoupled)

O

I =1 A/div

0.75 A to2.25 A /step

O

V =1V/div

I

V

=1V/div

O

500ms/div

V =10mV/div

(ACCoupled)

O

PH=2V/div

500ns/div

TPS54377

SLVS779 – SEPTEMBER 2007

TA = 25°C, fs = 1.1 MHz, VI = 3.3 V, VO = 1.8 V (unless otherwise specified)

EFFICIENCY

OUTPUT VOLTAGE

vs

OUTPUT CURRENT

LOOP RESPONSE

Figure 13.

Figure 14.

Figure 15.

OUTPUT RIPPLE VOLTAGE

LOAD TRANSIENT RESPONSE

SLOW-START TIMING

Figure 16.

Figure 17.

Figure 18.

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