
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 CONVERTER
4.5 V-32 V Input
1.2 V-3.3 V/1 A Output
Non-Isolated output
Trim function
Low profile package (7.82 mm)
Remote On/Off
OCP/SCP
Under-voltage lockout (UVLO)
Description
The Bel xRAH-01H1A0 is part of the low cost non-isolated dc/dc converter series. The modules use a SMD or
vertical mount package for ease of layout and space savings. The output is widely trimmed from 1.2 V to 3.3 V.
Typical features include remote on/off, input under voltage lockout, over current protection and short circuit
protection.
Part Selection
Output
Voltage
1.2 V - 3.3 V
Input
Voltage
4.5 V - 32 V
Max. Output
Current
1 A
Max. Output
Power
3.3 W
Typical
Efficiency
86%
Part Number
Surface Mount
SRAH-01H1A0
Part Number
Vertical Mount
VRAH-01H1A0
Note:
Add “0” suffix at the end of the model number to indicate “Tube Packaging”, and “R” for “Reel
Packaging”, and “G” for “Tray Packaging”.
Absolute Maximum Ratings
Parameter
Input Voltage (continuous)
Min
-0.3 V
Typ
-
Max
34 V
Notes
Output Enable Terminal Voltage
-0.3 V
-
12 V
Ambient Temperature
-40
°
C
-
85
°
C
Storage Temperature
-40
°
C
-
125
°
C
Input Specifications
Parameter
Input Voltage
Min
4.5 V
Typ
20 V
Max
32 V
Notes
Input Current (no load)
Input Current (full load)
-
-
-
-
-
-
-
5 mA
-
-
-
-
-
2 mA
8 mA
0.20 A
0.16 A
0.12 A
0.11 A
0.09 A
5 mA
V
O
=3.3 V
V
O
=2.5 V
V
O
=1.8 V
V
O
=1.5 V
V
O
=1.2 V
Remote Off Input Current
Input Reflected Ripple Current
(pk-pk)
Input Reflected Ripple Current
(RMS)
I
2
t Inrush Current Transient
Tested with simulated source impedance of 500
nH, 5 Hz to 20 MHz and one 100 F/50 V electrolytic
capacitor and a 3.3 uF/50 V ceramic capacitor at
the input
-
300 mA
420 mA
-
100 mA
160 mA
-
0.02 A
2
s
0.1 A
2
s
Turn on Voltage Threshold
-
4.1 V
4.5 V
Turn off Voltage Threshold
Note:
All specifications are typical at 25
°
C unless otherwise stated
.
-
3.3 V
4.0 V
xRAH-01H1A0 RoHS Compliant