TPS62732 datasheet(9/27 Pages) TI

Part #	TPS62732

Description	Step Down Converter with Bypass Mode for Ultra Low Power Wireless Applications

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Manufacturer	TI [Texas Instruments]

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I

= 1 mA 25ºC

OUT

DC/DC

mode

bypass

mode

2

2.05

2.1

2.15

2.2

2.25

2.3

1.9

2

2.1

2.2

2.3

2.4

2.5

V

- Input Voltage - V

IN

I

= 20 mA -40ºC

OUT

I

= 1 mA 85ºC

OUT

I

= 20 mA 25ºC

OUT

I

= 1 mA -40ºC

OUT

I

= 20 mA 85ºC

OUT

ON/BYP = high

automatic transition

into bypass mode

falling VIN

0

0.1

0.2

0.3

0.4

0.5

0.6

0.7

1.9

2.3

2.9

3.5

3.9

V

- Input Voltage - V

IN

2.1

2.7

2.5

3.1

3.3

3.7

T = -40°C

A

T = 25°C

A

T = 50°C

A

T = 60°C

A

T = 70°C

A

T = 85°C

A

T = -20°C

A

T = 0°C

A

DC/DC mode

bypass mode

2

2.05

2.1

2.15

2.2

2.25

2.3

1.9

2

2.1

2.2

2.3

2.4

2.5

V

- Input Voltage - V

IN

I

= 1 mA -40ºC

OUT

I

= 1 mA 25ºC

OUT

I

= 1 mA 85ºC

OUT

I

= 20 mA -40ºC

OUT

I

= 20 mA

OUT

I

= 20 mA 85ºC

OUT

ON/BYP = high

automatic transition

into bypass mode

rising V

IN

0

500

1000

1500

2000

2500

3000

3500

0

10

20

30

40

50

I

- Output Current - mA

OUT

L = 2.2 H Murata LQM21PN2R2,

C

= 2.2 F,

ON/BYP = V

m

OUT

IN

V

= 2.3 V

IN

V

= 2.5 V

IN

V

= 2.7 V

IN

V

= 3 V

IN

V

= 3.3 V

IN

V

= 3.6 V

IN

TPS62730

www.ti.com

SLVSAC3

– MAY 2011

TYPICAL CHARACTERISTICS (continued)

Figure 9. rDS(ON) NMOS vs Input Voltage

Figure 10. Automatic Transition into Bypass Mode -

Falling VIN

Figure 11. Automatic Transition into Bypass Mode - Rising

Figure 12. Switching Frequency vs IOUT vs VIN

VIN

Copyright

9

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