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

12 Vdc Input

Vref/2 / 10 A Output

•

Non-Isolated

•

Remote On/Off

•

High Efficiency

•

Under-voltage Lockout (UVLO)

•

High Power Density

•

OCP/SCP

•

Low Cost

•

Remote Sense

Description

The VRPC-10AT5x is a non-isolated step down dc/dc converter that operates from a nominal 12 V source. This

converter is designed specifically to provide bus termination voltages in applications such as DDR (double data

rate) memory where the bus termination voltage must closely track the I/O bus voltage. The converter accepts a

reference input and uses this to program its output voltage to 50% of the reference. The unit is packaged in an

industry-standard single-in-line footprint and provides a maximum 10 A output. Standard features include remote

on/off, input under-voltage lockout, over current protection and remote sense. Replace “x” in the part number with

“S” or “A” depending on your specific application and specific external capacitor bank.

Part Selection

Output Voltage

Input Voltage

Max. Output

Current

Max. Output

Power

Typical

Efficiency

Model Number

Vref/2

12 V

10 A

25 W

82%

VRPC-10AT5S

Vref/2

12 V

10 A

25 W

82%

VRPC-10AT5A

Notes: 1. All part numbers above indicate RoHS 6. Change the second letter "R" to "7" for RoHS 5 part numbers.

2. Add “G” suffix at the end of the model number to indicate “Tray Packaging”. See page 5 for model

number differences.

Absolute Maximum Ratings

Parameter

Min

Typ

Max

Notes

Input Voltage (continuous)

-0.3 V

-

15 V

Output Enable Terminal Voltage

-0.3 V

-

15 V

Ambient Temperature

0

°C

-

70

°C

Storage Temperature

-40

°C

-

100

°C

Input Specifications

Parameter

Min

Typ

Max

Notes

Input Voltage

10.8 V

-

13.2 V

Input Current (full load)

-

-

2.1 A

Input Current (no load)

-

-

50 mA

Remote Off Input Current

-

3

15 mA

Input Reflected Ripple Current (pk-pk)

-

-

180 mA

Input Reflected Ripple Current (rms)

-

-

50 mA

Tested with a 470 uF/16 V input

capacitor with ESR=0.03 ohm max

at 100 kHz & simulated source

impedance of 500 nH, 5 Hz to 20

MHz.

I

-

0.08 A

0.16 A

Turn-on Voltage Threshold

-

9.7 V

-

Turn-off Voltage Threshold

8.0 V

8.8 V

10 V

Note: All specifications are tested at Vref =2.5 V.

VRPC-10AT5x

RoHS Compliant

Rev.A