TPS54617_15 datasheet(11/21 Pages) TI

Part #	TPS54617

Description	3-V TO 6-V INPUT, 6-A, SMALL SYNCHRONOUS-BUCK SWITCHER WITH INTEGRATED FETs (SWIFT??

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Manufacturer	TI [Texas Instruments]

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PERFORMANCE GRAPHS

35

41

47

53

59

65

71

77

83

89

95

IO − OutputCurrent − A

0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5 5.5 6 6.5

V =6V

I

V =5V

I

V =3V

I

V =3.3V

I

f =1600kHz

s

V =1.8V

O

I

− OutputCurrent − A

O

-0.4

-0.35

-0.3

-0.25

-0.2

-0.15

-0.1

-0.05

0

0.05

0.1

0.15

0.2

0.25

0.3

0.35

0.4

0

1

2

3

4

5

6

V =3V

I

V =5V

I

V =3.3V

I

f =1600kHz

T =25 C

V =1.8V

s

A

O

o

V =6V

I

V − InputVoltage − V

I

-0.3

-0.25

-0.2

-0.15

-0.1

-0.05

0

0.05

0.1

0.15

0.2

0.25

0.3

3

3.5

4

4.5

5

5.5

6

I =0 A

O

I =3 A

O

I =6 A

O

f =1600kHz

T =25 C

V =1.8V

s

A

O

o

t − Time − 1 s/div

m

V =5V

I

V =1.8V

O

f =1600kHz

V =6 A

s

O

t − Time − 5 s/div

m

V =5V

I

V =1.8V

O

25

50

75

100

125

0

1

2

3

4

5

6

7

8

I − OutputCurrent − A

O

V =3.3V

I

f =1600kHz

s

T =125°C

j

V =1.8V

O

t − Time − 5ms/div

V =5V

I

V =1.8V

O

0.047 F

Slow-StartCapacitor

m

t − Time − 1 s/div

m

V =5V

I

V =1.8V

O

f =1600kHz

V =6 A

s

O

-60dB

-40dB

-30dB

-20dB

-10dB

0dB

10dB

20dB

30dB

60dB

-180deg

-120deg

-90deg

-60deg

-30deg

0deg

30deg

60deg

90deg

120deg

180deg

1-Gain

1-Phase

Frequency

100kHz

1M

40dB

50dB

-50dB

100Hz

1kHz

10kHz

150deg

-150deg

TPS54617

www.ti.com ........................................................................................................................................... SLVS880A – NOVEMBER 2008 – REVISED JANUARY 2009

EFFICIENCY

LOAD REGULATION

LINE REGULATION

vs

OUTPUT CURRENT

INPUT VOLTAGE

Figure 12.

Figure 13.

Figure 14.

AMBIENT TEMPERATURE

vs

LOAD CURRENT(1)

OUTPUT RIPPLE VOLTAGE

TRANSIENT RESPONSE

Figure 15.

Figure 16.

Figure 17.

SLOW-START TIMING

INPUT RIPPLE VOLTAGE

CLOSED LOOP RESPONSE

Figure 18.

Figure 19.

Figure 20.

(1)Safe operating area is applicable to the test board conditions listed in the dissipation rating table section of this

data sheet.

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