LTC3127EDDPBF datasheet(4/20 Pages) LINER

Part #	LTC3127EDDPBF

Description	1A Buck-Boost DC/DC Converter with Programmable Input Current Limit

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Manufacturer	LINER [Linear Technology]

Direct Link	http://www.linear.com

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LTC3127

3127f

Typical perForMance characTerisTics

Average Input Current Limit

vs VIN (Normalized)

Average Input Current Limit

vs Temperature (Normalized)

Quiescent Current vs VIN (Fixed

Frequency Mode–Not Switching)

Burst Mode Quiescent Current

vs VIN

No Load Input Current vs VIN in

Burst Mode Operation

Efficiency vs Load Current

(TJ = 25°C, unless otherwise noted )

VIN (V)

1.8

–1

2

2.6

3.4

4.2

–3

–2

–4

–5

1

0

2.2

3

5

3.8

4.6

5.4

3127 G04

VOUT = 3.3V

RPROG = 32.4k

TEMPERATURE (°C)

–45

–1

2

–15

15

45

–3

–2

–4

–5

1

0

–30

0

75

30

60

90

3127 G05

VOUT = 3.3V

RPROG = 32.4k

PWM

BURST

LOAD CURRENT (mA)

0.1

10

100

1000

1

3127 G01

VIN = 1.8V

VIN = 3.6V

VIN = 5V

40

50

60

70

80

30

20

10

0

90

100

VOUT = 1.8V

BURST

PWM

LOAD CURRENT (mA)

0.1

10

100

1000

1

3127 G02

VIN = 2.9V

VIN = 3.6V

VIN = 4.3V

40

50

60

70

80

30

20

10

0

90

100

VOUT = 3.3V

100

10

1000

1

0.1

10000

BURST

PWM

LOAD CURRENT (mA)

3127 G03

VIN = 4.5V

VIN = 5V

VIN = 5.5V

40

50

60

70

80

30

20

10

0

90

100

VOUT = 5V

VIN (V)

1.8

51.5

52.0

4.6

51.0

50.5

2.6

3.4

2.2

3

3.8

5

4.2

5.4

49.0

48.5

50.0

52.5

49.5

3127 G08

VOUT = 3.3V

VIN (V)

1.8

390

410

4.6

370

350

2.6

3.4

2.2

3

3.8

5

4.2

5.4

290

270

330

430

310

3127 G06

VIN (V)

1.8

35

38

2.6

3.4

4.2

33

34

32

37

36

2.2

3

5

3.8

4.6

5.4

3127 G07

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LTC3127EDDPBF Datasheet(PDF) 4 Page - Linear Technology

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