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

3.0 Vdc - 5.5 Vdc Input, -5 Vdc/1 A, -5.2 Vdc/1 A, -12 Vdc/0.5 A Outputs

•

Non-Isolated

•

Low Cost

•

Fixed Frequency

•

Excellent Thermal Performance

•

High Efficiency

•

High Power Density

•

UL60950-1 Recognized (UL/cUL)

•

OCP/SCP

•

Industrial Temperature Range

Description

The Bel xRAH-01FxxN modules are non-isolated; step down dc/dc converters that operate from a 3 V - 5.5 V

source. Output voltages are -5.0 V, -5.2 V, and -12 V. They are packaged in a compact, overmolded package

rated at 1 A, 1 A, 0.5 A. Optional lead forming provides a vertical mount product for minimal footprint or a surface

mount option for a very low profile. The output is closely regulated and the efficiency is typically 88% at 1 A, -5 V

output at full load.

Part Selection

Output

Voltage

Input

Voltage

Max. Output

Current

Max. Output

Power

Typical

Efficiency

Part Number

Surface Mount

Part Number

Vertical Mount

-5.0 V

3.0 V - 5.5 V

1 A

5 W

88%

SRAH-01F50N

VRAH-01F50N

-5.2 V

3.0 V - 5.5 V

1 A

5.2 W

88%

SRAH-01F52N

VRAH-01F52N

-12 V

3.0 V - 5.5 V

0.5 A

6 W

88%

SRAH-01FX2N

VRAH-01FX2N

Notes: 1. Add “0” suffix at the end of the model number to indicate “Tube Packaging”, and “R” for “Reel

Packaging”, and “G” for “Tray Packaging”.

2. 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

-

7 V

Ambient Temperature

-40

°C

-

85

°C

Storage Temperature

-40

°C

-

125

°C

Input Specifications

Parameter

Min

Typ

Max

Notes

Input Voltage

3 V

-

5.5 V

Input Current (full load)

-

-

-

-

2.1 A

2.5 A

Input Current (no load)

-

-

-

-

150 mA

200 mA

Input Reflected Ripple Current

(pk-pk)

-

80 mA

160 mA

Input Reflected Ripple Current

(rms)

-

20 mA

50 mA

For -5 V & -5.2 V output, use a 680uF/6.3

V Os-con capacitor; For -12 V output, use

1000 uF electrolytic capacitor & 22 uF/10

V ceramic capacitor at the input.

I

-

-

0.01 A

Turn-on Voltage Threshold

-

2.63 V

-

Turn-off Voltage Threshold

0.4 V

1.0 V

-

-

2.0 V

2.3 V

xRAH-01FxxN Series

RoHS Compliant

Rev.A