Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 Tel 201-432-0463 Fax 201-432-9542 www.belfuse.com
2004 Bel Fuse Inc. Specifications subject to change without notice. 03.04
POWER PRODUCTS
NON-ISOLATED DC/DC CONVERTERS
BP03x7AH-05A
12V Input / 0.9V 5.0V Output / 5A
Nonisolated
Compact, low profile surface mount package
Fixed frequency
High efficiency means less power dissipation
Excellent thermal performance
Optimized for cost
Remote on/off
Undervoltage lockout (UVLO)
Over current and short circuit protection
Description
The Bel S7AH-05A and V7AH-05A modules are a series of non-isolated, step down DC/DC power converters that operate
from a nominal 12V source. These converters are available in a range of output voltages from 0.9V to 5.0V. They are packaged
in a compact, overmolded package rated at 5A. Optional lead forming provides a vertical mount product for minimal footprint or
a surface mount option for a very low profile. Standard features include remote on/off, over current and short circuit protection,
output voltage adjust and industrial temperature ranges (-40 to +85 C). The output is closely regulated and the efficiency is
typically 91.5% at full load. These products may be used almost anywhere low voltage silicon is employed and a 12V source is
available. Typical applications include file servers, routers, line cards and other computing and communications equipment.
Applications
page 1
S7AH-05A / V7AH-05A Series
Distributed power architectures
Data networking equipment
Telecommunications
Computers and peripherals
Part Number Selection
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Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 Tel 201-432-0463 Fax 201-432-9542 www.belfuse.com
2004 Bel Fuse Inc. Specifications subject to change without notice. 03.04
POWER PRODUCTS
NON-ISOLATED DC/DC CONVERTERS
BP03x7AH-05A
12V Input / 0.9V 5.0V Output / 5A
page 2
Input Specifications
Absolute Maximum Ratings
Note: Use beyond the maximum ratings may cause a reliability degradation of the DC/DC
converter or may permanently damage the device.
Note: Input capacitance one 270F/16V, ESR = 0.018
max at 100kHz @ 25 C.
1. With simulated source impedance of 500nH, 5Hz to 20MHz.
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Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 Tel 201-432-0463 Fax 201-432-9542 www.belfuse.com
2004 Bel Fuse Inc. Specifications subject to change without notice. 03.04
POWER PRODUCTS
NON-ISOLATED DC/DC CONVERTERS
BP03x7AH-05A
12V Input / 0.9V 5.0V Output / 5A
page 3
Output Specifications
Note: All specifications are typical at nominal input, full load at 25 C unless otherwise stated.
1. Vin = 12V, Iout = full load, Ta = 25 C.
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Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 Tel 201-432-0463 Fax 201-432-9542 www.belfuse.com
2004 Bel Fuse Inc. Specifications subject to change without notice. 03.04
POWER PRODUCTS
NON-ISOLATED DC/DC CONVERTERS
BP03x7AH-05A
12V Input / 0.9V 5.0V Output / 5A
Output Specifications
Note: All specifications are typical at nominal input, full load at 25 C unless otherwise stated.
2. 0 - 20MHz, 22F/6.3V X5R ceramic cap on output (10F/10V X5R ceramic cap for 5.0V module).
3. For fast start up modules.
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page 4
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 Tel 201-432-0463 Fax 201-432-9542 www.belfuse.com
2004 Bel Fuse Inc. Specifications subject to change without notice. 03.04
POWER PRODUCTS
NON-ISOLATED DC/DC CONVERTERS
BP03x7AH-05A
12V Input / 0.9V 5.0V Output / 5A
page 5
Output Specifications
Note: All specifications are typical at nominal input, full load at 25 C unless otherwise stated.
3. di/dt = 0.5A/uS, Ta = 25 C. 0.9V ~ 3.3V modules with 220F/6.3V Tant cap (5.0V module with 100F/10V tant cap).
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Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 Tel 201-432-0463 Fax 201-432-9542 www.belfuse.com
2004 Bel Fuse Inc. Specifications subject to change without notice. 03.04
POWER PRODUCTS
NON-ISOLATED DC/DC CONVERTERS
BP03x7AH-05A
12V Input / 0.9V 5.0V Output / 5A
page 6
Output Specifications
Note: All specifications are typical at nominal input, full load at 25 C unless otherwise stated.
3. di/dt = 0.5A/uS, Ta = 25 C. 0.9V ~ 3.3V modules with 220F/6.3V Tant cap (5.0V module with 100F/10V tant cap).
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Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 Tel 201-432-0463 Fax 201-432-9542 www.belfuse.com
2004 Bel Fuse Inc. Specifications subject to change without notice. 03.04
POWER PRODUCTS
NON-ISOLATED DC/DC CONVERTERS
BP03x7AH-05A
12V Input / 0.9V 5.0V Output / 5A
page 7
Control Specifications
General Specifications
1. Vin=12V, full load and Ta=25 C.
2. See graphs on pages 17-25.
3. With remote on/off pin 1 open, the module is on.
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Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 Tel 201-432-0463 Fax 201-432-9542 www.belfuse.com
2004 Bel Fuse Inc. Specifications subject to change without notice. 03.04
POWER PRODUCTS
NON-ISOLATED DC/DC CONVERTERS
BP03x7AH-05A
12V Input / 0.9V 5.0V Output / 5A
page 8
Efficiency Data
MODULE 3.3V
70%
75%
80%
85%
90%
95%
0.50
1.25
2.50
3.75
5.00
OUTPUT CURRENT
E
F
F
I
CI
E
NCY
10.8
12
13.2
MODULE 2.5V
65%
70%
75%
80%
85%
90%
95%
0.50
1.25
2.50
3.75
5.00
OUTPUT CURRENT
E
F
F
I
CI
E
NCY
10.8
12
13.2
MODULE 1.8V
60%
65%
70%
75%
80%
85%
90%
0.50
1.25
2.50
3.75
5.00
OUTPUT CURRENT
EF
F
I
C
I
EN
C
Y
10.8
12
13.2
MODULE 5.0V
70%
75%
80%
85%
90%
95%
100%
0.50
1.25
2.50
3.75
5.00
OUTPUT CURRENT
E
F
F
I
CI
E
NCY
10.8
12
13.2
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 Tel 201-432-0463 Fax 201-432-9542 www.belfuse.com
2004 Bel Fuse Inc. Specifications subject to change without notice. 03.04
POWER PRODUCTS
NON-ISOLATED DC/DC CONVERTERS
BP03x7AH-05A
12V Input / 0.9V 5.0V Output / 5A
Efficiency Data
MODULE 1.2V
50%
55%
60%
65%
70%
75%
80%
85%
0.50
1.25
2.50
3.75
5.00
OUTPUT CURRENT
EF
F
I
C
I
EN
C
Y
10.8
12
13.2
MODULE 1.0V
50%
55%
60%
65%
70%
75%
80%
85%
0.50
1.25
2.50
3.75
5.00
OUTPUT CURRENT
E
F
F
I
CI
E
NCY
10.8
12
13.2
MODULE 0.9V
50%
55%
60%
65%
70%
75%
80%
85%
0.50
1.25
2.50
3.75
5.00
OUTPUT CURRENT
E
FFI
C
I
E
N
C
Y
10.8
12
13.2
page 9
MODULE 1.5V
60%
65%
70%
75%
80%
85%
90%
0.50
1.25
2.50
3.75
5.00
OUTPUT CURRENT
EF
F
I
C
I
EN
C
Y
10.8
12
13.2
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 Tel 201-432-0463 Fax 201-432-9542 www.belfuse.com
2004 Bel Fuse Inc. Specifications subject to change without notice. 03.04
POWER PRODUCTS
NON-ISOLATED DC/DC CONVERTERS
BP03x7AH-05A
12V Input / 0.9V 5.0V Output / 5A
page 10
Ripple and Noise
Ripple and noise at full load and 12Vdc input,
2.5Vdc output and Ta=25 C
Ripple and noise at full load and 12Vdc input,
1.8Vdc output and Ta=25 C
0.9V ~ 3.3V modules with 22F/6.3V X5R ceramic cap at the output.
5.0V module with 10F/10V X5R ceramic cap at the output.
Ripple and noise at full load and 12Vdc input,
3.3Vdc output and Ta=25 C
Ripple and noise at full load and 12Vdc input,
5.0Vdc output and Ta=25 C
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 Tel 201-432-0463 Fax 201-432-9542 www.belfuse.com
2004 Bel Fuse Inc. Specifications subject to change without notice. 03.04
POWER PRODUCTS
NON-ISOLATED DC/DC CONVERTERS
BP03x7AH-05A
12V Input / 0.9V 5.0V Output / 5A
Ripple and Noise
Ripple and noise at full load and 12Vdc input,
1.0Vdc output and Ta=25 C
Ripple and noise at full load and 12Vdc input,
0.9Vdc output and Ta=25 C
Ripple and noise at full load and 12Vdc input,
1.2Vdc output and Ta=25 C
page 11
Ripple and noise at full load and 12Vdc input,
1.5Vdc output and Ta=25 C
0.9V ~ 3.3V modules with 22F/6.3V X5R ceramic cap at the output.
5.0V module with 10F/10V X5R ceramic cap at the output.
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 Tel 201-432-0463 Fax 201-432-9542 www.belfuse.com
2004 Bel Fuse Inc. Specifications subject to change without notice. 03.04
POWER PRODUCTS
NON-ISOLATED DC/DC CONVERTERS
BP03x7AH-05A
12V Input / 0.9V 5.0V Output / 5A
page 12
Transient Response
Transient response: di/dt = 0.5A/S, 0.9V ~ 3.3V modules with 220F/6.3V tant cap, 5.0V module with 100F/10V tant cap.
Vout=3.3V
50% to 100% load transients at 12V input and Ta=25 C
Vout=3.3V
100% to 50% load transients at 12V input and Ta=25 C
Vout=5.0V
50% to 100% load transients at 12V input and Ta=25 C
Vout=5.0V
100% to 50% load transients at 12V input and Ta=25 C
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 Tel 201-432-0463 Fax 201-432-9542 www.belfuse.com
2004 Bel Fuse Inc. Specifications subject to change without notice. 03.04
POWER PRODUCTS
NON-ISOLATED DC/DC CONVERTERS
BP03x7AH-05A
12V Input / 0.9V 5.0V Output / 5A
page 13
Transient Response
Vout=1.8V
100% to 50% load transients at 12V input and Ta=25 C
Vout=1.8V
50% to 100% load transients at 12V input and Ta=25 C
Vout=2.5V
50% to 100% load transients at 12V input and Ta=25 C
Vout=2.5V
100% to 50% load transients at 12V input and Ta=25 C
Transient response: di/dt = 0.5A/S, 0.9V ~ 3.3V modules with 220F/6.3V tant cap, 5.0V module with 100F/10V tant cap.
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 Tel 201-432-0463 Fax 201-432-9542 www.belfuse.com
2004 Bel Fuse Inc. Specifications subject to change without notice. 03.04
POWER PRODUCTS
NON-ISOLATED DC/DC CONVERTERS
BP03x7AH-05A
12V Input / 0.9V 5.0V Output / 5A
page 14
Vout=1.0V
50% to 100% load transients at 12V input and Ta=25 C
Vout=1.0V
100% to 50% load transients at 12V input and Ta=25 C
Vout=1.2V
50% to 100% load transients at 12V input and Ta=25 C
Vout=1.2V
100% to 50% load transients at 12V input and Ta=25 C
Transient Response
Vout=1.5V
50% to 100% load transients at 12V input and Ta=25 C
Vout=1.5V
100% to 50% load transients at 12V input and Ta=25 C
Transient response: di/dt = 0.5A/S, 0.9V ~ 3.3V modules with 220F/6.3V tant cap, 5.0V module with 100F/10V tant cap.
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 Tel 201-432-0463 Fax 201-432-9542 www.belfuse.com
2004 Bel Fuse Inc. Specifications subject to change without notice. 03.04
POWER PRODUCTS
NON-ISOLATED DC/DC CONVERTERS
BP03x7AH-05A
12V Input / 0.9V 5.0V Output / 5A
x7AH-05A1A0
0.9 ~ 1.8V
Thermal Considerations
Transient Response
Vout=0.9V
50% to 100% load transients at 12V input and Ta=25 C
Vout=0.9V
100% to 50% load transients at 12V input and Ta=25 C
page 15
Transient response: di/dt = 0.5A/S, 0.9V ~ 3.3V modules with 220F/6.3V tant cap, 5.0V module with 100F/10V tant cap.
Vin = 12V
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 Tel 201-432-0463 Fax 201-432-9542 www.belfuse.com
2004 Bel Fuse Inc. Specifications subject to change without notice. 03.04
POWER PRODUCTS
NON-ISOLATED DC/DC CONVERTERS
BP03x7AH-05A
12V Input / 0.9V 5.0V Output / 5A
Thermal Considerations
x7AH-05A500
page 16
x7AH-05A1A0
2.5V ~ 3.3V
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 Tel 201-432-0463 Fax 201-432-9542 www.belfuse.com
2004 Bel Fuse Inc. Specifications subject to change without notice. 03.04
POWER PRODUCTS
NON-ISOLATED DC/DC CONVERTERS
BP03x7AH-05A
12V Input / 0.9V 5.0V Output / 5A
page 17
Output Voltage Set-Point Adjustment
x7AH-05A1A0 Trim Resistor Calculation
Rtrim up =
3.712
Vo, adj Vo
0.261
)
Kohm
(
Vo
Trim
Gnd
Vo
Trim
Gnd
Trim Down Test Circuit
Trim Up Test Circuit
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 Tel 201-432-0463 Fax 201-432-9542 www.belfuse.com
2004 Bel Fuse Inc. Specifications subject to change without notice. 03.04
POWER PRODUCTS
NON-ISOLATED DC/DC CONVERTERS
BP03x7AH-05A
12V Input / 0.9V 5.0V Output / 5A
x7AH-05A090 Trim Resistor Calculation
Rtrim up =
3.712
Vo, adj Vo
40.2
)
Kohm
(
page 18
Output Voltage Set-Point Adjustment
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 Tel 201-432-0463 Fax 201-432-9542 www.belfuse.com
2004 Bel Fuse Inc. Specifications subject to change without notice. 03.04
POWER PRODUCTS
NON-ISOLATED DC/DC CONVERTERS
BP03x7AH-05A
12V Input / 0.9V 5.0V Output / 5A
Output Voltage Set-Point Adjustment
x7AH-05A100 Trim Resistor Calculation
Rtrim up =
3.712
Vo, adj Vo
3.83
)
Kohm
(
Rtrim down =
0.9516
Vo, adj Vo
8.47
)
Kohm
(
page 19
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 Tel 201-432-0463 Fax 201-432-9542 www.belfuse.com
2004 Bel Fuse Inc. Specifications subject to change without notice. 03.04
POWER PRODUCTS
NON-ISOLATED DC/DC CONVERTERS
BP03x7AH-05A
12V Input / 0.9V 5.0V Output / 5A
Output Voltage Set-Point Adjustment
x7AH-05A120 Trim Resistor Calculation
Rtrim up =
3.712
Vo, adj Vo
10
)
Kohm
(
Rtrim down =
1.879
Vo, adj Vo
14.640
)
Kohm
(
page 20
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 Tel 201-432-0463 Fax 201-432-9542 www.belfuse.com
2004 Bel Fuse Inc. Specifications subject to change without notice. 03.04
POWER PRODUCTS
NON-ISOLATED DC/DC CONVERTERS
BP03x7AH-05A
12V Input / 0.9V 5.0V Output / 5A
x7AH-05A150 Trim Resistor Calculation
Rtrim up =
3.712
Vo, adj Vo
16.2
)
Kohm
(
Rtrim down =
3.273
Vo, adj Vo
20.84
)
Kohm
(
page 21
Output Voltage Set-Point Adjustment
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 Tel 201-432-0463 Fax 201-432-9542 www.belfuse.com
2004 Bel Fuse Inc. Specifications subject to change without notice. 03.04
POWER PRODUCTS
NON-ISOLATED DC/DC CONVERTERS
BP03x7AH-05A
12V Input / 0.9V 5.0V Output / 5A
Output Voltage Set-Point Adjustment
x7AH-05A180 Trim Resistor Calculation
Rtrim up =
3.712
Vo, adj Vo
19.6
)
Kohm
(
Rtrim down =
4.669
Vo, adj Vo
24.24
)
Kohm
(
page 22
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 Tel 201-432-0463 Fax 201-432-9542 www.belfuse.com
2004 Bel Fuse Inc. Specifications subject to change without notice. 03.04
POWER PRODUCTS
NON-ISOLATED DC/DC CONVERTERS
BP03x7AH-05A
12V Input / 0.9V 5.0V Output / 5A
x7AH-05A250 Trim Resistor Calculation
Rtrim up =
3.712
Vo, adj Vo
13.3
)
Kohm
(
Rtrim down =
7.912
Vo, adj Vo
17.94
)
Kohm
(
Output Voltage Set-Point Adjustment
page 23
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 Tel 201-432-0463 Fax 201-432-9542 www.belfuse.com
2004 Bel Fuse Inc. Specifications subject to change without notice. 03.04
POWER PRODUCTS
NON-ISOLATED DC/DC CONVERTERS
BP03x7AH-05A
12V Input / 0.9V 5.0V Output / 5A
Output Voltage Set-Point Adjustment
x7AH-05A330 Trim Resistor Calculation
Rtrim up =
3.712
Vo, adj Vo
10
)
Kohm
(
Rtrim down =
11.614
Vo, adj Vo
14.64
)
Kohm
(
page 24
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 Tel 201-432-0463 Fax 201-432-9542 www.belfuse.com
2004 Bel Fuse Inc. Specifications subject to change without notice. 03.04
POWER PRODUCTS
NON-ISOLATED DC/DC CONVERTERS
BP03x7AH-05A
12V Input / 0.9V 5.0V Output / 5A
Output Voltage Set-Point Adjustment
x7AH-05A500 Trim Resistor Calculation
Rtrim up =
3.712
Vo, adj Vo
6.19
)
Kohm
(
Rtrim down =
19.4618
Vo, adj Vo
10.83
)
Kohm
(
page 25
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 Tel 201-432-0463 Fax 201-432-9542 www.belfuse.com
2004 Bel Fuse Inc. Specifications subject to change without notice. 03.04
POWER PRODUCTS
NON-ISOLATED DC/DC CONVERTERS
BP03x7AH-05A
12V Input / 0.9V 5.0V Output / 5A
Mechanical
page 26
S7AH-05A
0.400
[10.16]
0.60
[15.24]
0.70
[17.78]
0.050
[1.27]
0.100
[2.54]
4x
0.400
[10.16]
0.012
[0.30]
0.050
[1.27]
0.020
[0.51]
0.320
[8.13]
0.780
[19.81]
0.055 [1.40] 2x
0.090 [2.29] 2x
0.004 [0.10]
0-5
R0.015
[R0.38] typ
R0.008
[R0.20] typ
0.100 [2.54]
0.855
[21.72]
0.065 [1.65]
0.110
[2.79]
Suggested PCB Pad Layout
Dimensions are in inches [millimeters].
Standard dimension tolerance is 0.005 [0.13] unless otherwise noted.
1 2 3 4 5
6
7
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CORPORATE
Bel Fuse Inc.
206 Van Vorst Street
Jersey City, NJ 07302
Tel
201-432-0463
Fax
201-432-9542
www.belfuse.com
FAR EAST
Bel Fuse Ltd.
8F / 8 Luk Hop Street
San Po Kong
Kowloon, Hong Kong
Tel
852-2328-5515
Fax 852-2352-3706
www.belfuse.com
EUROPE
Bel Fuse Europe Ltd.
Preston Technology Management Centre
Marsh Lane, Suite G7, Preston
Lancashire, PR1 8UD, U.K.
Tel
44-1772-556601
Fax 44-1772-888366
www.belfuse.com
2004 Bel Fuse Inc. Specifications subject to change without notice. 03.04
POWER PRODUCTS
NON-ISOLATED DC/DC CONVERTERS
BP03x7AH-05A
12V Input / 0.9V 5.0V Output / 5A
Mechanical
page 27
V7AH-05A
0.700
[17.78]
0.600
[15.24]
0.050
[1.27]
0.265
[6.73]
min
0.020
[0.51]
0.308
[7.82]
0.050 [1.27]
0.100 [2.54]
0.400 [10.16]
Dimensions are in inches [millimeters].
Standard dimension tolerance is 0.005 [0.13] unless otherwise noted.
2
4
3
5
1
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