LTC3569IUD-TRPBF datasheet(6/24 Pages) LINER

Part #	LTC3569IUD-TRPBF

Description	Triple Buck Regulator With 1.2A and Two 600mA Outputs and Individual Programmable References

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Manufacturer	LINER [Linear Technology]

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LTC3569

6

3569f

TYPICAL PERFORMANCE CHARACTERISTICS

Line Regulation

FB Pin Leakage

IQSD vs Temperature

VSUPPLY (V)

2

0.15

0.05

0.10

–0.05

0.00

–0.10

–0.15

4

3569 G16

6

5

3

BUCK2 = 1.2V

BUCK1 = 1.8V

BUCK3 = 1.5V

PULSE SKIP MODE

ILOAD1 = 200mA

ILOAD2, 3 = 150mA

EACH BUCK TESTED INDIVIDUALLY

VFB (V)

0

1000

10

100

0.1

1

0.01

0.001

4

3569 G17

6

5

3

2

1

SLAVE

DETECTOR = 250nA

IFB2,3

IFB1

VIN = 5.5V

TEMPERATURE (°C)

–50

10000

1000

10

100

1

0.1

50

3569 G18

150

100

0

VIN = 5.5V

TA = 25°C, unless otherwise noted.

Buck1 Load Regulation

Buck2 Load Regulation

Buck3 Load Regulation

ILOAD (A)

0

0.6

0.0

0.2

0.4

–0.4

–0.2

–0.6

0.6

3569 G13

1.2

0.8

1

0.2

0.4

VIN = 5.5V

VIN = 4.5V

VIN = 3.5V

VIN = 2.5V

PULSE SKIP

BUCK2, 3 OFF

ILOAD (A)

0

0.6

0.0

0.2

0.4

–0.4

–0.2

–0.6

0.3

3569 G14

0.6

0.4

0.5

0.1

0.2

VIN = 5.5V

VIN = 4.5V

VIN = 3.5V

VIN = 2.5V

BUCK1, 3 OFF

PULSE SKIP

ILOAD (A)

0

0.6

0.0

0.2

0.4

–0.4

–0.2

–0.6

0.3

3569 G15

0.6

0.4

0.5

0.1

0.2

BUCK1, 2 OFF

PULSE SKIP

VOUT3 = 1.5V

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