LTC1709EG-7 查看數據表（PDF） - Linear Technology

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LTC1709EG-7

2-Phase, 5-Bit VID, Current Mode, High Efficiency, Synchronous Step-Down Switching Regulator

Linear Technology 

LTC1709-7

TYPICAL PERFOR A CE CHARACTERISTICS

Load Regulation

0.0

–0.1

–0.2

–0.3

FCB = 0V

VIN = 15V

FIGURE 1

VITH vs VRUN/SS

2.5

VOSENSE = 0.7V

2.0

1.5

1.0

0.5

SENSE Pins Total Source Current

100

50

0

–50

–0.4

0

1

2

3

4

5

LOAD CURRENT (A)

17097 G13

Maximum Current Sense

Threshold vs Temperature

80

78

76

74

72

70

–50 –25

0 25 50 75

TEMPERATURE (°C)

100 125

17097 G16

Load Step (Figure 12)

VIN = 15V, VOUT = 1.6V

VOUT

50mV/DIV

0

012

3

4

VRUN/SS (V)

56

17097 G14

–100

0

2

4

6

VSENSE COMMON MODE VOLTAGE (V)

17097 G15

RUN/SS Current vs Temperature

1.8

1.6

1.4

1.2

1.0

0.8

0.6

0.4

0.2

0

–50 –25

0 25 50 75

TEMPERATURE (°C)

100 125

17097 G17

Burst Mode Operation (Figure 12)

VIN = 15V, VOUT = 1.6V, IL = 200mARMS

VOUT(AC)

20mV/DIV

IL1

1A/DIV

Soft-Start Up (Figure 12)

VITH

1V/DIV

VOUT

2V/DIV

VRUN/SS

2V/DIV

100ms/DIV

17097 G18

Constant Frequency Mode

(Figure 12)

VIN = 15V, VOUT = 1.6V, IL = 400mARMS

VOUT(AC)

20mV/DIV

IL1

1A/DIV

IOUT

0/20A

FCB = 0V

20µs/DIV

17097 G19

IL2

1A/DIV

FCB = OPEN

10µs/DIV

17097 G25

IL2

1A/DIV

FCB = INTVCC

2µs/DIV

17097 G26

6

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