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

3.3 Vdc Input

0.9 Vdc - 2.5 Vdc/15 A Output

General Specifications

Parameter

Min

Typ

Max

Notes

Efficiency

91%

88%

87%

84%

80%

93%

90%

89%

86%

83%

-

-

-

-

-

Measured at Vin=3.3 V, full load.

Switching Frequency

250 kHz

300 kHz

340 kHz

Output Voltage Trim Range

Vo=2.5 V

Vo=0.9 V-1.8 V

-

-

Remote Sense Compensation

-

-

-

-

The total output adjust range will not be

higher than 105% Vo for 2.5 V module,

and 110% Vo for other modules.

MTBF

4,163,010 hours

Calculated Per Bell Core SR-332

°C)

Dimensions

Inches (L × W × H)

Millimeters (L × W × H)

2.0 x 0.55 x 0.387

50.8 x 13.97 x 9.84

Weight

-

9.2 g

-

Note

Control Specifications

Parameter

Min

Typ

Max

Notes

Remote On/Off

Signal Low (Unit Off)

-0.3 V

-

0.8 V

Signal High (Unit On)

2.5 V

-

5.5 V

VRPB-15CxxS

Signal Low (Unit On)

-0.3 V

-

0.8 V

Signal High (Unit Off)

2.5 V

-

5.5 V

VRPB-15CxxL

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

V

A

R

adj

nom

adj

down

trim

−

−

−

=

)

8

.

0

(

_

D

V

V

C

R

nom

adj

up

trim

−

−

=

_

Vnom

A

B

C

D

2.5 V

2.370

4.990

1.896

4.990

1.8 V

2.370

4.990

1.896

4.990

1.5 V

2.370

4.990

1.896

4.990

1.2 V

2.490

2.370

1.992

2.370

0.9 V

1.050

0.010

0.840

0.010

Module

Vout

GND

Sense

trim

Rtrim_down

Rtrim_up

Module

Vout

GND

Sense

trim