Bel Fuse Inc.

206 Van Vorst Street, Jersey City, NJ 07302

• Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com

NON-ISOLATED DC/DC CONVERTERS

4.5 Vdc - 32 Vdc Input

1.2 Vdc - 5.0 Vdc/3 A Output

General Specifications

Parameter

Min

Typ

Max

Notes

Efficiency

Vo=1.2 V

89%

87%

85%

82%

80%

78%

92%

90%

88%

85%

83%

81%

-

-

-

-

-

Measured at Vin=12 V, full load and

Ta=25

°C

Switching Frequency

200 kHz

300 kHz

400 kHz

Output Trim Range (narrow trim)

90%Vo

-

110%Vo

MTBF

8,120,000 hours

°C)

Dimensions (surface mount)

Inches (L × W × H)

Millimeters (L × W × H)

0.78 x 0.70 x 0.32

19.81 x 17.78 x 8.13

Dimensions (vertical)

Inches (L × W × H)

Millimeters (L × W × H)

0.70 x 0.308 x 0.65

17.78 x 7.82 x 16.51

Weight

-

5.1 g

-

Control Specifications

Parameter

Min

Typ

Max

Notes

Remote On/Off

Signal Low (Unit On)

-0.3 V

-

1 V

Signal High (Unit Off)

2.8 V

-

12 V

Remote on/off pin open, unit on.

Output Trim Equations

Equations for calculating the trim resistor (in kΩ) given the desired adjusted voltage (Vadj) and the nominal output

voltage of the converter (Vnom) are shown below. The Trim Down resistor should be connected between the Trim

pin and Vout. The Trim Up resistor should be connected between the Trim pin and Ground. Only one of the

resistors should be used for any given application.

B

V

V

A

R

adj

nom

trimdown

−

−

=

D

V

V

C

R

nom

adj

trimup

−

−

=

Vnom

A

B

C

D

5.0

61.850

29.400

11.760

14.700

3.3

53.840

61.700

17.200

40.200

2.5

9.556

15.620

4.496

10.000

1.8

3.849

13.830

3.064

10.000

1.5

3.102

14.420

3.536

10.000

1.2

1.794

10.910

3.536

6.490

Vout

Trim

GND

Rtrim-down

Module

Vout

Trim

GND

Rtrim-up

Module