LT3493E-3 查看數據表（PDF） - Linear Technology

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LT3493E-3

1.2A, 750kHz Step-Down Switching Regulator in 2mm × 3mm DFN

Linear Technology 

LT3493-3

TYPICAL PERFOR A CE CHARACTERISTICS TA = 25°C unless otherwise noted.

SHDN Pin Current

50

45

40

35

30

25

20

15

10

5

0

0 2 4 6 8 10 12 14 16 18 20

VSHDN (V)

3493-3 G14

Operating Waveforms

Switch Current Limit

2.0

1.9

1.8

1.7

1.6

1.5

1.4

1.3

1.2

1.1

1.0

–50 –25

0 25 50

TEMPERATURE (°C)

75 100

3493-3 G17

Switch Current Limit

2.0

1.8

1.6

1.4

1.2

1.0

0.8

0.6

0.4

0.2

0

0

20

40

60

DUTY CYCLE (%)

80 100

3493-3 G18

Operating Waveforms,

Discontinuous Mode

VSW

5V/DIV

IL

0.5A/DIV

0

VOUT

20mV/DIV

VIN = 12V

VOUT = 3.3V

IOUT = 0.5A

L = 10µH

COUT = 10µF

1µs/DIV

3493-3 G19

VSW

5V/DIV

IL

0.5A/DIV

0

VOUT

20mV/DIV

VIN = 12V

VOUT = 3.3V

IOUT = 50mA

L = 10µH

COUT = 10µF

1µs/DIV

3493-3 G20

3493-3f

5

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