NON-ISOLATED DC/DC CONVERTERS
4.5V-32V Input
1.2V-5.0V/3A Output
x7AH-03H Series
•
•
•
•
Non-Isolated
High Efficiency
High Power Density
Excellent Thermal Performance
•
•
•
•
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
•
Tel 201-432-0463
•
Fax 201-432-9542
•
www.belfuse.com
NON-ISOLATED DC/DC CONVERTERS
4.5V-32V Input
1.2V-5.0V/3A Output
Output Specifications
Parameter
Output Voltage Set Point
V
O
=5.0V
V
O
=3.3V
V
O
=2.5V
V
O
=1.8V
V
O
=1.5V
Vo=1.2V
Line Regulation
V
O
=5.0V
V
O
=1.2-3.3V
Load Regulation
V
O
=5.0V
V
O
=1.2-3.3V
Regulation Over Temperature
(-40°C to +85°C)
Output Current
Current Limit Threshold
Short Circuit Surge Transient
V
O
=1.2V-5.0V
Ripple and Noise (RMS)
V
O
=1.2V-5.0V
Ripple and Noise (pk-pk)
V
O
=1.2V-5.0V
Turn on Time
Overshoot at Turn on
Output Capacitance
Transient Response
50% ~ 100%
Max Load
100% ~ 50%
Max Load
50% ~ 100%
Max Load
100% ~ 50%
Max Load
50% ~ 100%
Max Load
100% ~ 50%
Max Load
50% ~ 100%
Max Load
100% ~ 50%
Max Load
Overshoot
Settling Time
Overshoot
Settling Time
Overshoot
Settling Time
Overshoot
Settling Time
Overshoot
Settling Time
Overshoot
Settling Time
Overshoot
Settling Time
Overshoot
Settling Time
V
O
=1.2V -
1.5V
V
O
=1.8V -
2.5V
V
O
=3.3V
V
O
=5.0V
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
150mV
100uS
150mV
100uS
130mV
100uS
130mV
100uS
100mV
50uS
100mV
50uS
90mV
40uS
90mV
40uS
200mV
150uS
200mV
150uS
180mV
150uS
180mV
150uS
150mV
100uS
150mV
100uS
140mV
80uS
140mV
80uS
Test conditions:
di/dt = 0.5A/uS; Vin = 12V;
with a 220uF Tantalum
capacitor at the output.
-
-
-
220uF
60mV
15mS
2%
-
100mV
50mS
5%
1200uF
-
25mV
50mV
-
-
-
-
0A
3.3A
-
-
Min
4.900V
3.234V
2.450V
1.764V
1.470V
1.176V
Typ
5.0V
3.3V
2.5V
1.8V
1.5V
1.2V
±10mV
±5mV
±10mV
±5mV
30mV
-
-
0.02A
2
s
Max
5.100V
3.366V
2.550V
1.836V
1.530V
1.224V
±15mV
±10mV
±15mV
±10mV
50mV
3A
9A
0.1A
2
s
Tested with 0-20MHz BW,
with a 220uF tantalum
capacitor at the output.
Notes
Test conditions:
Vin=12V, Io=50% full load
Note:
All specifications are typical at nominal input, full load at 25
°C
unless otherwise stated.
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
4.5V-32V Input
Parameter
Efficiency
V
O
=5.0V
V
O
=3.3V
V
O
=2.5V
V
O
=1.8V
V
O
=1.5V
Vo=1.2V
Switching Frequency
Output Trim Range (narrow trim)
MTBF
Dimensions (surface mount)
Inches (L
×
W
×
H)
Millimeters (L
×
W
×
H)
Dimensions (vertical)
Inches (L
×
W
×
H)
Millimeters (L
×
W
×
H)
Weight
89%
87%
85%
82%
80%
78%
200KHz
90%Vo
92%
90%
88%
85%
83%
81%
300KHz
-
-
-
-
-
-
400KHz
110%Vo
Calculated Per Bell Core TR-332 (I
O
=
Nominal; T
a
= 25°C)
Measured at Vin=12V, full load and
Ta=25°C
1.2V-5.0V/3A Output
Min
Typ
Max
Notes
General Specifications
8,120,000 hours
0.78 x 0.70 x 0.32
19.81 x 17.78 x 8.13
0.70 x 0.308 x 0.65
17.78 x 7.82 x 16.51
5.1g
-
-
Control Specifications
Parameter
Remote On/Off
Signal Low (Unit On)
Signal High (Unit Off)
Min
-0.3V
2.8V
Typ
-
-
Max
1V
12V
Notes
Remote on/off pin open, unit on.
Output Trim Equations
Equations for calculating the trim resistor (in kΩ) given the desired adjusted voltage (Vadj) and the nominal
output voltage of the converter (Vnom) are shown below. The Trim Down resistor should be connected between
the Trim pin and Vout. The Trim Up resistor should be connected between the Trim pin and Ground. Only one of
the resistors should be used for any given application.
R
trimdown
A
=
−
B
V
nom
−
V
adj
Vout
Rtrimdown
Module
Trim
GND
R
trimup
=
V
adj
C
−
D
−
V
nom
A
61.850
53.840
9.556
3.849
3.102
1.794
Vout
Module
Trim
Rtrimup
GND
Vnom
5.0
3.3
2.5
1.8
1.5
1.2
B
29.400
61.700
15.620
13.830
14.420
10.910
C
11.760
17.200
4.496
3.064
3.536
3.536
D
14.700
40.200
10.000
10.000
10.000
6.490
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
4.5V-32V Input
1.2V-5.0V/3A Output
Efficiency Data
5.0V Module
100.0%
90.0%
80.0%
Efficiency
70.0%
60.0%
50.0%
40.0%
30.0%
0.3
0.8
1.5
Output Current
2.3
3.0
Efficiency
100.0%
90.0%
3.3V Module
8V
12V
24V
32V
80.0%
70.0%
60.0%
50.0%
40.0%
30.0%
0.3
0.8
1.5
Output Current
2.3
3.0
4.9V
12V
24V
32V
2.5V Module
100.0%
90.0%
80.0%
Efficiency
70.0%
60.0%
50.0%
40.0%
30.0%
0.3
0.8
1.5
Output Current
2.3
3.0
4.5V
12V
24V
32V
Efficiency
100.0%
90.0%
80.0%
70.0%
60.0%
50.0%
40.0%
30.0%
0.3
0.8
1.8V Module
4.5V
12V
24V
32V
1.5
Output Current
2.3
3.0
1.5V Module
100.0%
90.0%
80.0%
Efficiency
70.0%
60.0%
50.0%
40.0%
30.0%
0.3
0.8
1.5
Output Current
2.3
3.0
4.5V
Efficiency
100.0%
90.0%
80.0%
70.0%
60.0%
50.0%
40.0%
30.0%
0.3
0.8
1.2V Module
4.5V
12V
24V
32V
12V
24V
32V
1.5
Output Current
2.3
3.0
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
4.5V-32V Input
1.2V-5.0V/3A Output
Thermal Derating Curve
Vin=24V
Bel Fuse Inc.
206 Van Vorst Street, Jersey City, NJ 07302
•
Tel 201-432-0463
•
Fax 201-432-9542
•
www.belfuse.com
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