LTC3370_15 datasheet(6/24 Pages) LINER

Part #	LTC3370

Description	4-Channel 8A Configurable Buck DC/DCs

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Manufacturer	LINER [Linear Technology]

Direct Link	http://www.linear.com

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LTC3370

6

3370f

For more information www.linear.com/LTC3370

Typical perForMance characTerisTics

Buck VIN Undervoltage Threshold

vs Temperature

VCC Supply Current vs

Temperature

VCC Supply Current vs

Temperature

RT Programmed Oscillator

Frequency vs Temperature

Default Oscillator Frequency vs

Temperature

Buck Efficiency vs ILOAD

Buck Power Loss vs ILOAD

VCC Undervoltage Threshold vs

Temperature

Oscillator Frequency vs VCC

TA = 25°C, unless otherwise noted.

LOAD CURRENT (mA)

3370 G01

100

90

80

40

30

20

10

70

50

60

0

1

1000

100

10

Burst Mode OPERATION

VIN = 3.3V

VOUT = 1.8V

fOSC = 2MHz

L = 2.2µH

1A BUCK

2A BUCK

3A BUCK

4A BUCK

3000

2500

1000

500

2000

1500

0

1

1000

100

10

Burst Mode OPERATION

VIN = 3.3V

VOUT = 1.8V

fOSC = 2MHz

L = 2.2µH

3370 G02

1A BUCK

2A BUCK

3A BUCK

4A BUCK

LOAD CURRENT (mA)

TEMPERATURE (°C)

–55 –25

5

35

65

95

125 155

2.30

2.35

2.40

2.45

2.50

2.55

2.60

2.65

2.70

3370 G03

VCC RISING

VCC FALLING

TEMPERATURE (°C)

–55 –25

5

35

65

95

125 155

1.90

1.95

2.00

2.05

2.10

2.15

2.20

2.25

2.30

3370 G04

VIN RISING

VIN FALLING

TEMPERATURE (°C)

–55 –25

5

35

65

95

125 155

1.80

1.85

1.90

1.95

2.00

2.05

2.10

2.15

2.20

3371 G07

VCC = 2.7V

VCC = 3.3V

VCC = 5.5V

RT = 400k

TEMPERATURE (°C)

–55 –25

5

35

65

95

125 155

1.80

1.85

1.90

1.95

2.00

2.05

2.10

2.15

2.20

3370 G08

VCC = 2.7V

VCC = 3.3V

VCC = 5.5V

VRT = VCC

VCC (V)

2.7

2.20

2.15

2.00

1.90

2.10

2.05

1.95

1.85

1.80

3.9

5.1

3.5

4.7

3370 G09

5.5

3.1

4.3

VRT = VCC

RT = 400k

AT LEAST ONE BUCK ENABLED

PLL/MODE = 0V

FB = 850mV

VCC = 2.7V

VCC = 3.3V

VCC = 5.5V

TEMPERATURE (°C)

–55 –25

5

35

65

95

125 155

0

25

50

75

100

125

3370 G05

AT LEAST ONE BUCK ENABLED

PLL/MODE = 2MHz

TEMPERATURE (°C)

–55 –25

5

35

65

95

125 155

0

40

80

120

160

200

240

280

320

360

400

3370 G06

VCC = 2.7V

VCC = 3.3V

VCC = 5.5V

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LTC3370 Datasheet(PDF) 6 Page - Linear Technology

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