NON-ISOLATED DC/DC CONVERTERS
4.5V-32V Input
1.2V-5.0V/3A Output
x7AH-03H Series
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•
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Non-Isolated
High Efficiency
High Power Density
Excellent Thermal Performance
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Remote On/Off
Input Under Voltage Lockout
OCP/SCP
Low Cost
Description
The Bel x7AH-03Hxx0 is part of the low cost non-isolated DC/DC power converter series. It is packaged in a
compact, overmolded package rated at 3A. 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 of
3.3V output is typically 90% at full load. Typical features include remote on/off, input under voltage lockout, over
current protection and short circuit protection.
Part Selection
Output
Voltage
5.0V
3.3V
2.5V
1.8V
1.5V
1.2V
Input
Voltage
8.0V – 32V
4.9V – 32V
4.5V –32V
4.5V –32V
4.5V – 32V
4.5V – 32V
Max. Output
Current
3A
3A
3A
3A
3A
3A
Max. Output
Power
15W
10W
7.5W
5.4W
4.5W
3.6W
Typical
Efficiency
92%
90%
88%
85%
83%
81%
Part Number
Surface Mount
S7AH-03H500
S7AH-03H330
S7AH-03H250
S7AH-03H180
S7AH-03H150
S7AH-03H120
Part Number
Vertical Mount
V7AH-03H500
V7AH-03H330
V7AH-03H250
V7AH-03H180
V7AH-03H150
V7AH-03H120
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)
Output Enable Terminal Voltage
Ambient Temperature
Storage Temperature
Min
-0.3V
-0.3V
-40°C
-40°C
Typ
-
-
-
-
Max
34V
12V
85°C
125°C
Notes
Input Specifications
Parameter
Input Voltage
Input Current (no load)
Input Current (full load)
Remote Off Input Current
Input Reflected Ripple Current
(pk-pk)
Input Reflected Ripple Current
(RMS)
I
2
t Inrush Current Transient
Turn on Voltage Threshold
1
Turn off Voltage Threshold
2
Min
4.5V
-
-
-
-
-
-
-
-
Typ
-
30mA
-
4mA
200mA
100mA
0.02A
2
s
4.1V
3.3V
Max
32V
-
3A
-
400mA
150mA
0.1A
2
s
4.5V
4.0V
Notes
See “Part Selection” for more details.
Tested with simulated source impedance
of 500nH, 5Hz to 20MHz and two
100uF/50V electrolytic capacitors and a
3.3uF/50V ceramic capacitor at the input.
Notes:
1. The max Turn on Voltage threshold of the 3.3V & 5.0V output module will be relaxed to 4.9V & 8.0V
respectively.
2. The max Turn off Voltage threshold of the 3.3V output module will be relaxed to 4.5V. The 5.0V output
module does not have such function.
Bel Fuse Inc.
206 Van Vorst Street, Jersey City, NJ 07302
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Tel 201-432-0463
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Fax 201-432-9542
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www.belfuse.com
BEL [ BEL FUSE INC. ]
