LTM4609 datasheet(6/30 Pages) LINER

Part #	LTM4609

Description	High Efficiency, Synchronous,4-Switch Buck-Boost Controller

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Manufacturer	LINER [Linear Technology]

Direct Link	http://www.linear.com

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6 / 30 page

LTC3780

6

3780ff

For more information www.linear.com/LTC3780

Typical perForMance characTerisTics

Efficiency vs Output Current

(Boost Operation)

Efficiency vs Output Current

(Buck Operation)

Supply Current vs Input Voltage

Internal 6V LDO Line Regulation

EXTVCC Voltage Drop

INTVCC and EXTVCC Switch

Voltage vs Temperature

EXTVCC Switch Resistance

vs Temperature

Load Regulation

TA = 25°C, unless otherwise noted.

ILOAD (A)

0.01

40

80

90

100

0.1

1

10

3780 G01

70

60

50

BURST

DCM

CCM

VIN = 6V

VOUT = 12V

ILOAD (A)

0.01

40

80

90

100

0.1

1

10

3780 G02

70

60

50

BURST

DCM

CCM

VIN = 12V

VOUT = 12V

ILOAD (A)

0.01

40

80

90

100

0.1

1

10

3780 G03

70

60

50

SC

DCM

CCM

VIN = 18V

VOUT = 12V

INPUT VOLTAGE (V)

0

5

0

1000

2500

10

20

25

3780 G04

500

2000

1500

15

30

35

VFCB = 0V

STANDBY

SHUTDOWN

INPUT VOLTAGE (V)

0

5.5

6.0

6.5

15

25

3780 G05

5.0

4.5

5

10

20

30

35

4.0

3.5

CURRENT (mA)

0

20

40

60

80

100

120

10

20

30

40

3780 G06

50

TEMPERATURE (°C)

–75 –50

5.55

5.60

5.70

5.75

5.80

6.05

5.90

0

50

75

3780 G07

5.65

5.95

6.00

5.85

–25

25

100 125

INTVCC VOLTAGE

EXTVCC SWITCHOVER THRESHOLD

TEMPERATURE (°C)

–75 –50 –25

0

2

5

0

50

75

3780 G08

1

4

3

25

100 125

LOAD CURRENT (A)

0

–0.2

–0.1

0

4

3780 G09

–0.3

–0.4

–0.5

1

2

3

5

VIN = 18V

FCB = 0V

VOUT = 12V

VIN = 12V

VIN = 6V

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