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

2.4 Vdc - 5.5 Vdc Input

0.75 Vdc - 3.63 Vdc/3 A Output

•

Non-Isolated

•

OCP/SCP

•

High Efficiency

•

Remote On/Off

•

High Power Density

•

Wide Trim Range

•

Fixed Frequency (300 kHz)

•

Converter Can Sink and Source

•

Under-voltage Lockout (UVLO)

Current

Description

The Bel VRBA-03F1Ax modules are a series of non-isolated dc/dc converters that deliver up to 3 A of output

current with full load efficiency of 94% at 3.3 Vdc output. These modules provide precisely regulated voltage

programmable via external resistor from 0.75 Vdc to 3.63 Vdc over a wide range of input voltage (2.4 Vdc - 5.5

Vdc). The open-frame construction and small footprint enable designers to develop cost and space-efficient

solutions. Standard features include remote On/Off, over current protection, short circuit protection, under-

voltage lockout, and programmable output voltage.

Part Selection

Output

Voltage

Input

Voltage

Max. Output

Current

Max. Output

Power

Typical

Efficiency

Model Number

Active Low

Model Number

Active High

0.75 V - 3.63 V

1

2.4 V - 5.5 V

3 A

10 W

94%

VRBA-03F1AL

VRBA-03F1A0

Notes

: 1. These modules use a buck topology, so the output voltages must be 0.5 V less than the input voltage.

2. Add “G” to the end of the Model Number to indicate Tray Packaging.

3. All part numbers above indicate RoHS 6. Change the second letter "R" to "7" for RoHS 5 part numbers.

Absolute Maximum Ratings

Parameter

Min

Typ

Max

Notes

Input Voltage (continuous)

-0.3 V

-

5.8 V

Output Enable Terminal Voltage

-0.3 V

-

5.5 V

Ambient Temperature

-40

°C

-

85

°C

Storage Temperature

-55

°C

-

125

°C

Note

: All specifications are typical at 25

°C unless otherwise stated.

VRBA-03F1Ax

RoHS Compliant

Rev.A