LCYG datasheet(5/24 Pages) LINER

Il numero della parte	LCYG

Spiegazioni elettronici	36V, 2A, 2.4MHz Step-Down Switching Regulator

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Produttore elettronici	LINER [Linear Technology]

Homepage	http://www.linear.com

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LT3505

5

3505fc

TYPICAL PERFORMANCE CHARACTERISTICS

Undervoltage Lockout

Switching Frequency

Frequency Foldback, RT = 75.0k

TEMPERATURE (

°C)

3.60

3.80

4.00

3505 G10

3.40

3.20

3.50

3.70

3.90

3.30

3.10

3.00

–25

–50

25

0

75

100 125

50

FB VOLTAGE (V)

0

0.1

0.2

0.3

0.4

0.2

0.4

0.6

0.8

3505 G12

0.5

0.6

0.1

0.3

0.5

0.7

TA = 25°C

Soft-Start

SHDN Pin Current

Typical Minimum Input Voltage,

(VOUT = 5V, fSW = 750kHz)

SHDN PIN VOLTAGE (V)

0

0.2

0.6

0.8

1.0

2.0

1.4

0.50

1 1.25

0.4

1.6

1.8

1.2

0.25

0.75

1.50 1.75 2

TA = 25°C

VSHDN (V)

0

30

40

50

16

3505 G14

20

10

25

35

45

15

5

0

4

2

8

6

12 14

18

10

20

TA = 25°C

LOAD CURRENT (mA)

1

6.0

6.2

6.4

6.6

6.8

10

100

1000

3505 G15

5.8

5.6

5.4

5.2

7.0

7.2

TO START

TO RUN

TA = 25°C

Typical Minimum Input Voltage,

(VOUT = 3.3V, fSW = 750kHz)

LOAD CURRENT (mA)

1

4.3

4.5

4.7

4.9

5.1

10

100

1000

4.1

3.9

3.7

3.5

5.3

5.5

TO START

TA = 25°C

TO RUN

Typical Minimum Input Voltage,

(VOUT = 3.3V, fSW = 2.2MHz)

LOAD CURRENT (mA)

1

3.5

5.0

5.5

10

100

1000

4.5

4.0

TO START

TO RUN

TA = 25°C

Typical Minimum Input Voltage,

(VOUT = 5V, fSW = 2.2MHz)

LOAD CURRENT (mA)

1

5.0

6.2

6.6

7.0

10

100

1000

5.8

5.4

6.0

6.4

6.8

5.6

5.2

TO START

TO RUN

TA = 25°C

TEMPERATURE (

°C)

0

0.60

0.80

1.20

1.40

1.60

100

2.40

1.00

50

25

–50 –25

75

125

1.80

2.00

2.20

RT = 21k

RT = 30.1k

RT = 75.0k

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