LT3640_15 datasheet(5/24 Pages) LINER

Part #	LT3640

Description	Dual Monolithic Buck Regulator with Power-On Reset and Watchdog Timer

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Manufacturer	LINER [Linear Technology]

Direct Link	http://www.linear.com

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LT3640

3640f

Typical perForMance characTerisTics

LV Channel Efficiency

(2MHz, VOUT2 = 1.8V)

Quiescent Current vs VIN

Quiescent Current vs Temperature

HV Channel Efficiency

(2MHz, VOUT1 = 3.3V)

HV Channel Efficiency

(2MHz, VOUT1 = 5V)

LV Channel Efficiency

(2MHz, VOUT2 = 1.2V)

TA = 25°C, unless otherwise noted.

FB1 Voltage vs Temperature

FB1 Voltage vs SS1

FB2 Voltage vs Temperature

VOUT1 CURRENT (A)

0

70

80

0.2

0.4

0.8

0.6

1.0

90

75

85

1.2

3640 G01

VIN = 12V

VIN = 24V

VIN = 16V

VOUT1 CURRENT (A)

0

70

80

0.2

0.4

0.8

0.6

1.0

90

75

85

1.2

3640 G02

VIN = 12V

VIN = 24V

VIN = 16V

VOUT2 CURRENT (A)

0

70

80

0.2

0.4

0.8

0.6

1.0

90

75

85

3640 G04

VIN2 = 3.3V

VIN2 = 5V

VIN VOLTAGE (V)

0

0.20

0.25

0.30

0.15

0.10

20

10

30

40

0.05

0.00

0.35

3640 G05

TEMPERATURE (°C)

–50

200

250

300

150

100

50

0

100

150

50

0

350

3640 G06

TEMPERATURE (°C)

–50

50

0

100

150

3640 G07

1.00

1.10

1.20

1.30

1.40

1.05

1.15

1.25

1.35

REGULATION

RST1 THRESHOLD

SS1 VOLTAGE (V)

1.0

0

0.5

1.5

2.0

3640 G08

0.0

0.4

0.8

1.2

1.4

0.2

0.6

1.0

TEMPERATURE (°C)

–50

50

0

100

150

3640 G09

0.45

0.55

0.65

0.70

0.50

0.60

REGULATION

RST2 THRESHOLD

VOUT2 CURRENT (A)

0

70

80

0.2

0.4

0.8

0.6

1.0

90

75

85

3640 G03

VIN2 = 3.3V

VIN2 = 5V

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LT3640 Datasheet(PDF) 5 Page - Linear Technology

LT3640 Datasheet(HTML) 5 Page - Linear Technology

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