XR

77103

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REV1B

Applications Information (Continued)

through a resistor divider. The Buck 1 programmable voltage range is from 0.8V to 6V with 0.05V resolution. When EXT1 is

set to 1, the output voltage is adjusted by the external resistor divider from the output to ground with the center tap connected

Bit 7

Bit 6

Bit 5

Bit 4

Bit 3

Bit 2

Bit 1

Bit 0

EXT1

D6

D5

D4

D3

D2

D1

D0

Hex

Hex

00

0.8

1A

2.1

01

0.85

1B

2.15

02

0.9

1C

2.2

03

0.95

1D

2.25

04

1

1E

2.3

05

1.05

20

2.4

06

1.1

21

2.45

07

1.15

22

2.5

08

1.2

23

2.55

09

1.25

24

2.6

0A

1.3

25

2.65

0B

1.35

26

2.7

0C

1.4

27

2.75

0D

1.45

28

2.8

0E

1.5

29

2.85

10

1.6

2A

2.9

11

1.65

2B

2.95

12

1.7

2C

3

13

1.75

2D

3.05

14

1.8

2E

3.1

15

1.85

30

3.2

16

1.9

31

3.25

17

1.95

32

3.3

18

2

33

3.35

19

2.05

34

3.4

Hex

Hex

35

3.45

50

4.8

36

3.5

51

4.85

37

3.55

52

4.9

38

3.6

53

4.95

39

3.65

54

5

3A

3.7

55

5.05

3B

3.75

56

5.1

3C

3.8

57

5.15

3D

3.85

58

5.2

3E

3.9

59

5.25

40

4

5A

5.3

41

4.05

5B

5.35

42

4.1

5C

5.4

43

4.15

5D

5.45

44

4.2

5E

5.5

45

4.25

60

5.6

46

4.3

61

5.65

47

4.35

62

5.7

48

4.4

63

5.75

49

4.45

64

5.8

4A

4.5

65

5.85

4B

4.55

66

5.9

4C

4.6

67

5.95

4D

4.65

68

6

4E

4.7