LTC1695 View Datasheet(PDF) - Linear Technology

Part Name

Description

MFG CO.

LTC1695

SMBus/I2C Fan Speed Controller in SOT-23

Linear Technology 

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APPLICATIONS INFORMATION

SMBus Address Byte Table

Decimal

HEX

SMBus Protocol

232

E8

Send Byte to the LTC1695

233

E9

Receive Byte from the LTC1695

The LSB of the SMBus address is the write bit. For send byte protocol,

W = 0. For Receive byte protocol, W = 1

SMBus Command Byte Table (Send Byte Protocol)

DECIMAL

(D5 to D0)

0

BINARY

MSB LSB

X0000000

HEX

(D6-D7 set to 0)

00

Nominal VOUT(V)

ILOAD = 1mA

0.000

1

X0000001

01

0.078

2

X0000010

02

0.156

3

X0000011

03

0.234

4

X0000100

04

0.313

5

X0000101

05

0.391

6

X0000110

06

0.469

7

X0000111

07

0.547

8

X0001000

08

0.625

9

X0001001

09

0.703

10

X0001010

0A

0.781

11

X0001011

0B

0.859

12

X0001100

0C

0.938

13

X0001101

0D

1.016

14

X0001110

0E

1.094

15

X0001111

0F

1.172

16

X0010000

10

1.250

17

X0010001

11

1.328

18

X0010010

12

1.406

19

X0010011

13

1.484

20

X0010100

14

1.563

21

X0010101

15

1.641

22

X0010110

16

1.719

23

X0010111

17

1.797

24

X0011000

18

1.875

25

X0011001

19

1.953

26

X0011010

1A

2.031

27

X0011011

1B

2.109

28

X0011100

1C

2.188

29

X0011101

1D

2.266

30

X0011110

1E

2.344

31

X0011111

1F

2.422

D6 = 0 disables the boost start timer.

D7 = X = don’t care

LTC1695

SMBus Data Byte Table (Receive Byte Protocol)

DECIMAL

BINARY

HEX

MSB LSB

LTC1695 Status

0

00000000

00

No Fault

128

10000000

80

Overcurrent Fault/Clamp

64

01000000

40

Thermal Shutdown

During thermal shutdown, the LTC1695’s LDO is shut off.

DECIMAL

BINARY

HEX

(D5 to D0) MSB LSB (D6-D7 set to 0)

32

X0100000

20

33

X0100001

21

34

X0100010

22

35

X0100011

23

36

X0100100

24

37

X0100101

25

38

X0100110

26

39

X0100111

27

40

X0101000

28

41

X0101001

29

42

X0101010

2A

43

X0101011

2B

44

X0101100

2C

45

X0101101

2D

46

X0101110

2E

47

X0101111

2F

48

X0110000

30

49

X0110001

31

50

X0110010

32

51

X0110011

33

52

X0110100

34

53

X0110101

35

54

X0110110

36

55

X0110111

37

56

X0111000

38

57

X0111001

39

58

X0111010

3A

59

X0111011

3B

60

X0111100

3C

61

X0111101

3D

62

X0111110

3E

63

X0111111

3F

D6 = 0 disables the boost start timer.

D7 = X = don’t care

Nominal VOUT(V)

ILOAD = 1mA

2.500

2.578

2.656

2.734

2.813

2.891

2.969

3.047

3.125

3.203

3.281

3.359

3.438

3.516

3.594

3.672

3.750

3.828

3.906

3.984

4.063

4.141

4.219

4.297

4.375

4.453

4.531

4.609

4.688

4.766

4.844

4.922

17

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