LTC3675 datasheet(10/36 Pages) LINER

Part #	LTC3675

Description	7-Channel Confi gurable High Power PMIC

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Manufacturer	LINER [Linear Technology]

Direct Link	http://www.linear.com

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LTC3675

10

3675f

TYPICAL PERFORMANCE CHARACTERISTICS

500mA Buck Regulators,

VOUT3 vs Temperature

500mA Buck Regulators, PMOS

Current Limit vs Temperature

500mA Buck Regulators, Switch

RDSON vs Temperature

Ganged Buck Regulators 1 and 2,

Efﬁciency vs Load

Boost Regulator,

Efﬁciency vs Load

Boost Regulator, Load Regulation

500mA Buck Regulators Transient

Response (Pulse-Skipping Mode)

500mA Buck Regulators Transient

Response (Burst Mode Operation)

500mA Buck Regulators No Load

Start-Up Transient

(Pulse-Skipping Mode)

TA = 25°C, unless otherwise noted.

25μs/DIV

VOUT3

500mV/DIV

INDUCTOR

CURRENT

500mA/DIV

EN

2V/DIV

3675 G21

VIN = 3.6V

50μs/DIV

VOUT3

100mV/DIV

AC-COUPLED

INDUCTOR

CURRENT

100mA/DIV

LOAD STEP = 50mA to 300mA

VIN = 3.6V, VOUT3 = 1.8V

3675 G19

50μs/DIV

VOUT3

100mV/DIV

AC-COUPLED

INDUCTOR

CURRENT

100mA/DIV

LOAD STEP = 50mA to 300mA

VIN = 3.6V, VOUT3 = 1.8V

3675 G20

TEMPERATURE (°C)

1.90

1.86

1.88

1.82

1.84

1.76

1.74

1.80

1.78

1.72

1.70

–15

–35

3675 G22

5

25

65

85 105 125

–55

45

VIN = 2.7V

PULSE-SKIPPING MODE, LOAD = 250mA

VIN = 3.6V

VIN = 5.5V

TEMPERATURE (°C)

1.50

1.30

1.35

1.40

1.45

1.20

1.25

1.05

1.00

1.15

1.10

0.95

0.90

–15

–35

3675 G23

5

25

65

85 105 125

–55

45

VIN = 2.7V

VIN = 3.6V

VIN = 5.5V

TEMPERATURE (°C)

1.0

0.8

0.9

0.6

0.7

0.3

0.2

0.5

0.4

0.1

0

–15

–35

3675 G24

5

25

65

85 105 125

–55

45

NMOS RDSON, VIN = 2.7V

PMOS RDSON, VIN = 2.7V

PMOS RDSON, VIN = 5.5V

NMOS RDSON, VIN = 5.5V

LOAD CURRENT (mA)

100

90

95

80

85

65

50

75

70

45

60

55

40

100

10

3675 G25

1000

10000

1

PULSE-SKIPPING MODE

Burst Mode OPERATION

VIN = 3.6V, VOUT1 = 1.2V

LOAD CURRENT (mA)

100

90

80

50

20

70

60

10

40

30

0

100

10

3675 G26

1000

1

VIN = 2.7V Burst Mode OPERATION

VIN = 3.6V Burst Mode OPERATION

VIN = 1.2V Burst Mode OPERATION

VIN = 2.7V PWM MODE

VIN = 3.6V PWM MODE

VIN = 4.2V PWM MODE

VOUT5 = 5V

LOAD CURRENT (mA)

5.20

5.05

4.90

5.15

5.10

4.85

5.00

4.95

4.80

100

10

3675 G27

1000

1

PWM MODE

VIN = 4.2V

VIN = 2.7V

VIN = 3.6V

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