LM2731 datasheet(5/16 Pages) NSC

No de pièce	LM2731

Description	0.6/1.6 MHz Boost Converters With 22V Internal FET Switch in SOT-23

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Fabricant	NSC [National Semiconductor (TI)]

Site Internet	http://www.national.com

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Absolute Maximum Ratings (Note 1)

If Military/Aerospace specified devices are required,

please contact the National Semiconductor Sales Office/

Distributors for availability and specifications.

Storage Temperature Range

−65˚C to +150˚C

Operating Junction

Temperature Range

−40˚C to +125˚C

Lead Temp. (Soldering, 5 sec.)

300˚C

Power Dissipation (Note 2)

Internally Limited

FB Pin Voltage

−0.4V to +6V

SW Pin Voltage

−0.4V to +22V

Input Supply Voltage

−0.4V to +14.5V

Shutdown Input Voltage

(Survival)

−0.4V to +14.5V

θ

J-A (SOT23-5)

265˚C/W

ESD Rating (Note 3)

Human Body Model

2 kV

Electrical Characteristics

Limits in standard typeface are for T

J = 25˚C, and limits in boldface type apply over the full operating temperature range

(−40˚C

≤ T

J

≤ +125˚C). Unless otherwise specified: V

IN = 5V, VSHDN = 5V, IL = 0A.

Symbol

Parameter

Conditions

Min

(Note 4)

Typical

(Note 5)

Max

(Note 4)

Units

V

IN

Input Voltage

2.7

14

V

OUT (MIN)

Minimum Output Voltage

Under Load

R

L =43

Ω

X Option

(Note 8)

V

IN = 2.7V

5.4

7V

V

IN = 3.3V

8

10

V

IN =5V

13

17

R

L =43

Ω

Y Option

(Note 8)

V

IN = 2.7V

8.25

10

V

IN = 3.3V

10.5

12

V

IN =5V

14

16

R

L =15

Ω

X Option

(Note 8)

V

IN = 2.7V

3.75

5

V

IN = 3.3V

5

6.5

V

IN =5V

8.75

11

R

L =15

Ω

Y Option

(Note 8)

V

IN = 2.7V

5

6

V

IN = 3.3V

5.5

7.5

V

IN =5V

9

11

I

SW

Switch Current Limit

(Note 6)

1.8

1.4

2A

R

DS(ON)

Switch ON Resistance

I

SW = 100 mA

Vin=5V

260

400

500

m

Ω

I

SW = 100 mA

Vin = 3.3V

300

450

550

SHDN

TH

Shutdown Threshold

Device ON

1.5

V

Device OFF

0.50

I

SHDN

Shutdown Pin Bias

Current

V

SHDN =0

0

µA

V

SHDN =5V

0

2

V

FB

Feedback Pin Reference

Voltage

V

IN =3V

1.205

1.230

1.255

V

I

FB

Feedback Pin Bias

Current

V

FB = 1.23V

60

500

nA

I

Q

Quiescent Current

V

SHDN = 5V, Switching "X"

2

3.0

mA

V

SHDN = 5V, Switching "Y"

1.0

2

V

SHDN = 5V, Not Switching

400

500

µA

V

SHDN = 0

0.024

1

FB Voltage Line

Regulation

2.7V

≤ V

IN

≤ 14V

0.02

%/V

F

SW

Switching Frequency

(Note 7)

“X” Option

1

1.6

1.85

MHz

“Y” Option

0.40

0.60

0.8

D

MAX

Maximum Duty Cycle

(Note 7)

“X” Option

86

93

%

“Y” Option

92

96

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