LT3507HUHF-PBF datasheet(5/28 Pages) LINER

Part #	LT3507HUHF-PBF

Description	Triple Monolithic Step-Down Regulator with LDO

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Manufacturer	LINER [Linear Technology]

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LT3507

5

3507f

TYPICAL PERFORMANCE CHARACTERISTICS

VFB vs Temperature

Frequency vs RT

Frequency vs Temperature

Frequency vs VFB (Foldback)

ITRK/SS vs Temperature

Efﬁciency vs Load Current,

Channel 1, VOUT = 1.8V

Switch VCESAT vs Switch Current,

Channels 1, 2 and 3

BOOST Pin Current vs Switch

Current, Channels 1, 2 and 3

Efﬁciency vs Load Current,

Channels 2 and 3, VOUT = 3.3V

IOUT (A)

0

90

80

60

70

50

40

2

1

3507 G01

2.5

1.5

0.5

VIN = 6V

VIN = 12V

VIN = 36V

TA = 25°C

fSW = 450kHz

IOUT (A)

0

100

80

90

60

70

50

40

1.2

0.6

3507 G02

1.5

0.9

0.3

VIN = 6V

VIN = 12V

VIN = 36V

TA = 25°C

fSW = 450kHz

ISW (A)

0

0.6

0.4

0.5

0.2

0.3

0.1

0

2.5

1

3507 G03

3

1.5

2

0.5

CHANNELS 2 & 3

CHANNEL 1

TA = 25°C

ISW (A)

0

100

80

70

60

50

40

90

20

30

10

0

2.5

1

3507 G04

3

1.5

2

0.5

CHANNELS 2 & 3

CHANNEL 1

TA = 25°C

TEMPERATURE (°C)

–50

805

803

802

801

800

799

804

797

798

796

795

130

–10

3507 G05

150

90

70

50

30

110

–30

RT (kΩ)

3507 G06

2.5

0.25

10

100

TA = 25°C

TEMPERATURE (°C)

–50

0.5

–0.5

–1.0

–1.5

0.0

–2.0

130

–10

3507 G07

150

90

70

50

30

110

–30

VFB (V)

0

1200

800

600

400

200

1000

0

0.8

0.4

3507 G08

1

0.6

0.2

RT = 40.2k

TA = 25°C

TEMPERATURE (°C)

–50

1.30

1.26

1.24

1.22

1.28

1.20

130

–10

3507 G09

150

90

70

50

30

110

–30

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LT3507HUHF-PBF Datasheet(PDF) 5 Page - Linear Technology

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