LT8645S datasheet(6/30 Pages) LINER

Part #	LT8645S

Description	65V, 8A Synchronous Step-Down Silent Switcher 2 with 2.5關A Quiescent Current

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Manufacturer	LINER [Linear Technology]

Direct Link	http://www.linear.com

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LT8645S/LT8646S

6

8645Sfa

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TYPICAL PERFORMANCE CHARACTERISTICS

EN Pin Thresholds

Reference Voltage

LT8645S Load Regulation

LT8645S Line Regulation

LT8645S No-Load Supply Current

Burst Mode Operation Efficiency

vs Inductor Value (LT8645S)

LT8646S Load Regulation

LT8646S Line Regulation

LT8646S No-Load Supply Current

VOUT = 5V

ILOAD = 10mA

L = WE–LHMI7050

VIN = 12V

VIN = 24V

INDUCTOR VALUE (µH)

1

2

3

4

5

6

7

8

9

10

65

70

75

80

85

90

95

100

8645S G10

TEMPERATURE (°C)

–50 –25

0

25

50

75

100 125

961

963

965

967

969

971

973

975

977

979

8645S G11

EN RISING

EN FALLING

TEMPERATURE (°C)

–50 –25

0

25

50

75

100 125

0.95

0.96

0.97

0.98

0.99

1.00

1.01

1.02

1.03

8645S G12

LOAD CURRENT (A)

0

1

2

3

4

5

6

7

8

–0.10

–0.05

0

0.05

0.10

0.15

0.20

8645S G13

VOUT = 5V

VIN = 12V

VSYNC = 0V

VOUT = 5V

VIN = 12V

VSYNC = 0V

LOAD CURRENT (A)

0

1

2

3

4

5

6

7

8

–0.50

–0.40

–0.30

–0.20

–0.10

0.00

0.10

0.20

0.30

0.40

8645S G14

VOUT = 5V

ILOAD = 2A

INPUT VOLTAGE (V)

5

15

25

35

45

55

65

–0.10

–0.05

0.00

0.05

0.10

0.15

0.20

8645S G15

VOUT = 5V

ILOAD = 2A

INPUT VOLTAGE (V)

5

15

25

35

45

55

65

–0.10

–0.05

0

0.05

0.10

0.15

0.20

0.25

0.30

LT8646S Line Regulation

8645S G16

VOUT = 5V

L = 4.7µH

IN REGULATION

INPUT VOLTAGE (V)

0

10

20

30

40

50

60

25

50

75

100

125

150

175

200

225

8645S G18

VOUT = 3.3V

L = 4.7µH

IN-REGULATION

INPUT VOLTAGE (V)

0

10

20

30

40

50

60

1.0

1.5

2.0

2.5

3.0

3.5

4.0

4.5

8645S G17

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LT8645S Datasheet(PDF) 6 Page - Linear Technology

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