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IMX35 Series Data Sheet

35 Watt Quad-Output DC-DC Converters

BCD20009-G Rev AC, 06-May-2013

Page 10 of 15

Progr. Input Undervoltage Lockout PUL

A special feature of the converters (with Rev. BA or later) is the

adjustable undervoltage lockout protection, which protects

the converter (and the system) from high current caused by

operation at low input voltages. This ensures easier start-up

in distributed power systems.

The table below shows the band of switch on/off and the

hysteresis.

The undervoltage lockout levels may be programmed by using

preset levels as specified in table 10.

voltage for input voltage.

20 IMX35

40 IMX35

∞

≤ 8

∞

≤ 15.5

39

10

43

22

19

12

16

26

13

14

10

28

9.1

16

0

32

70 IMX35

110 IMX35

∞

31

∞

42

270

40

270

50

110

50

120

60

80

55

51

75

Table 9: Trigger level and hysteresis (pin 1 left open)

Model

Trigger level

Hysteresis

Unit

20IMX35

7 to 8

<0.5

V

40IMX35

14 to 15.5

<1

70IMX35

31 to 34

<3

110IMX35

42 to 50

<8