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Model Selection Guide

Notes:

1. Start up time is measured at nominal input and with a constant resistive load.

2. Load regulation is specified for a load change of minimum load to full load.

3. When measuring output ripple, it is recommended that an external 1 µF capacitor and 10 µF capacitor be

4. Transient recovery is measured to within a 1% error band for a load step change of 25%.

5. Short circuit protection is provided by a “hiccup mode” circuit.

6. Operation at no-load will not damage the unit.

7. It is recommended that a fuse be used on the input of a power supply for protection. See the Model Selec-

tion table above for the correct rating.

An external resister may be added to adjust the converter

output.

To adjust the output UP, connect a 5%, 3W resistor between

the minus output pin (5) and the Vout trim pin (6). To adjust

the output DOWN, connect a 5%, 3W resistor between the plus

output pin (4) and the Vout trim pin (6).

The trim table at right gives suggested resistor values for

this adjustment.

External Trim

Remote On/Off

MB50xxS-03RU

Trim Down

Vout

Volts

72.61

32.55

19.20

12.52

8.51

5.84

3.94

2.51

1.39

0.50

k

Trim Up

Vout

Volts

60.84

27.40

16.25

10.68

7.34

5.11

3.51

2.32

1.39

0.65

k

MB50xxS-05RU

Trim Down

Vout

Volts

138.88

62.41

36.92

24.18

16.53

11.44

7.79

5.06

2.94

1.24

k

Trim Up

Vout

Volts

106.87

47.76

28.06

18.21

12.30

8.36

5.55

3.44

1.79

0.48

k

MB50xxS-12RU

Trim Down

Vout

Volts

413.55

184.55

108.22

70.05

47.15

31.88

20.98

12.80

6.44

1.35

k

Trim Up

Vout

Volts

351.00

157.50

93.00

60.75

41.40

28.50

19.29

12.37

7.00

2.70

k

MB50xxS-15RU

Trim Down

Vout

Volts

530.73

238.61

141.24

92.56

63.35

43.87

29.96

19.53

11.41

4.92

k

Trim Up

Vout

Volts

422.77

189.89

112.26

73.44

50.15

34.63

23.54

15.22

8.75

3.58

k

MB50xxS-24RU

Trim Down

Vout

Volts

333.39

148.80

87.26

56.50

38.04

25.73

16.94

10.35

5.22

1.12

k

Trim Up

Vout

Volts

243.70

108.50

63.43

40.90

27.38

18.37

11.93

7.10

3.34

0.34

k

Applying a signal to pin 3 will turn the unit ON/OFF. If the pin is left open, the unit operates. If

grounded, the unit will shut off. The specifications for the ON/OFF function are:

Parameter

Min

Typ

Max

Units

Supply On

3.5

12.0

VDC

Supply Off

0.0

1.2

VDC

Standby Input Current

2.5

mA

Control Common

Referenced to Negative Input (pin 2)

Control Input Current (ON)

0.5

mA

Control Input Current (OFF)

-0.5

mA

Model

Number

Input

Reflected

Ripple

Current

(mA, Typ)

Output

Over

Voltage

Protection

(VDC)

Efficiency

(%, Typ)

Capacitive

Load

(µF Max)

Fuse Rating

Slow-Blow

(A)

Voltage

(VDC)

Current

(mA, Max)

Current

(mA, Min)

Nominal

Range

Full-Load No-Load

MB5024S-03RU

24

9.0 - 36.0

1,528

80

40

3.3

10,000

0.0

3.9

90

26,000

10.0

MB5024S-05RU

24

9.0 - 36.0

2,290

60

40

5.0

10,000

0.0

6.2

91

17,000

10.0

MB5024S-12RU

24

9.0 - 36.0

2,267

80

40

12.0

4,170

0.0

15.0

92

3,000

10.0

MB5024S-15RU

24

9.0 - 36.0

2,263

80

40

15.0

3,330

0.0

18.0

92

2,000

10.0

MB5024S-24RU

24

9.0 - 36.0

2,286

80

40

24.0

2,080

0.0

30.0

91

750

10.0

MB5048S-03RU

48

18.0 - 75.0

764

40

30

3.3

10,000

0.0

3.9

90

26,000

5.0

MB5048S-05RU

48

18.0 - 75.0

1,145

30

30

5.0

10,000

0.0

6.2

91

17,000

5.0

MB5048S-12RU

48

18.0 - 75.0

1,134

60

30

12.0

4,170

0.0

15.0

92

3,000

5.0

MB5048S-15RU

48

18.0 - 75.0

1,134

60

30

15.0

3,330

0.0

18.0

92

2,000

5.0

MB5048S-24RU

48

18.0 - 75.0

1,143

50

30

24.0

2,080

0.0

30.0

91

750

5.0

For heatsink option, add suffix “H” to model number (i.e. MB5024S-03RU-H)