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 12 Vdc/0.8 A & 15 Vdc/0.6 A Output
• Non-Isolated • Trim Function (option)
• Fixed Frequency (550 kHz)
• High Efficiency
• Low Profile Package
• Allows Burst Mode Operation
at Low Load Currents
• UL60950-1 Recognized (UL/cUL)
Description
The Bel xRAH-01FXx0 is part of the low cost non-isolated dc/dc converter series. The modules use a surface
mount package or vertical package for ease of layout and space savings. The output is closely regulated and the
efficiency of 12 Vdc output module is typically 88% at full load. Typical features include burst mode operation at
light load and trim function (option).
Part Selection
Output
Voltage Input Voltage Max. Output
Current Max. Output
Power Typical
Efficiency Part Number
Surface Mount Part Number
Vertical Mount
12 Vdc 3.0 Vdc - 5.5 Vdc 0.8 A 9.6 W 88% SRAH-01FX20 VRAH-01FX20
15 Vdc 3.0 Vdc - 5.5 Vdc 0.6 A 9.0 W 88% SRAH-01FX50 VRAH-01FX50
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) 2.8 V - 6 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)
VO=12 V
VO=15 V
-
-
-
-
4.3 A
4.0 A
Input Reflected Ripple Current (pk-pk) - 100 mA 150 mA
Input Reflected Ripple Current (rms) - 30 mA 60 mA
With simulated source impedance
of 500 nH, 5 Hz to 20 MHz; Use
270 uF/16 V Oscon capacitor with
ESR = 0.018 ohm max. at 100 kHz
I2t Inrush Current Transient - 0.02 A2s 0.05 A2s
Turn-on Voltage Threshold - 2.8 V 2.9 V
Note: All specifications are typical at 25 °C unless otherwise stated.
xRAH-01FXx0 Series RoHS Com
liant Rev.A