TPS62690YFFR datasheet(7/28 Pages) TI

Part #	TPS62690YFFR

Description	500-mA / 600-mA, 4-MHz HIGH-EFFICIENCY STEP-DOWN

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Manufacturer	TI [Texas Instruments]

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0

10

20

30

40

50

60

70

80

90

100

0.1

1

10

100

1000

V = 3 V

PFM/PWM Operation

I

- Load Current - mA

O

V = 3.2 V

PFM/PWM Operation

I

V = 3.6 V

PFM/PWM Operation

I

V = 4.2 V

PFM/PWM Operation

I

V = 3.6 V

Forced PWM Operation

I

V

= 2.85 V

O

1

10

100

1000

0

10

20

30

40

50

60

70

80

90

100

I

- Load Current - mA

O

V = 3.2 V

Forced PWM

I

V

= 2.85 V

O

V = 3.6 V

Forced PWM

I

V = 4.2 V

Forced PWM

I

V = 3 V

Forced PWM

I

TPS62690

TPS62691

TPS62697

www.ti.com

SLVS965B

– MARCH 2011 – REVISED JANUARY 2012

TYPICAL CHARACTERISTICS

Table of Graphs

FIGURE

vs Load current

3, 4, 5

η

Efficiency

vs Input voltage

6

Peak-to-peak output ripple voltage

vs Load current

7, 8

Combined line/load transient

9, 10

response

Load transient response

11, 12, 13, 14

AC load transient response

15, 16, 17, 18

VO

DC output voltage

vs Load current

19, 20

PFM/PWM boundaries

vs Input voltage

21

IQ

Quiescent current

vs Input voltage

22

PWM switching frequency

vs Input voltage

23

fs

PFM switching frequency

vs Load current

24

P-channel MOSFET rDS(on)

vs Input voltage

25

rDS(on)

N-channel MOSFET rDS(on)

vs Input voltage

26

PWM operation

27

Power-save mode operation

28

Start-up

29, 30

PSRR

Power supply rejection ratio

vs. Frequency

31

Spurious output noise (PFM mode)

vs. Frequency

32

Spurious output noise (PWM mode)

vs. Frequency

33

Output spectral noise density

vs. Frequency

34

EFFICIENCY

vs

LOAD CURRENT

Figure 3.

Figure 4.

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