Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 Tel 201-432-0463 Fax 201-432-9542 www.belfuse.com
2002 Bel Fuse Inc. Specifications subject to change without notice. 01.02
POWER PRODUCTS
NON-ISOLATED DC/DC CONVERTERS
BP01V7PA-03A
12V Input / 1.5 3.3V Output / 3A
Nonisolated
Fixed frequency
High efficiency means less power dissipation
Optimized for cost
Remote on/off
Undervoltage lockout
Over current and short circuit protection
Description
The Bel V7PA-03A series modules are 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 1.5V to 3.3V. They are packaged in a single-in-line
footprint and provide a maximum 3A output. Standard features include remote on/off, over current protection and output
voltage adjust. 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
V7PA-03A Series
Telecommunications
Networking
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
2002 Bel Fuse Inc. Specifications subject to change without notice. 01.02
POWER PRODUCTS
NON-ISOLATED DC/DC CONVERTERS
BP01V7PA-03A
12V Input / 1.5 3.3V Output / 3A
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 270F/16V, ESR = 0.03
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
2002 Bel Fuse Inc. Specifications subject to change without notice. 01.02
POWER PRODUCTS
NON-ISOLATED DC/DC CONVERTERS
BP01V7PA-03A
12V Input / 1.5 3.3V Output / 3A
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.
2. 0 - 20MHz BW, 0.1F ceramic cap on output.
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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
2002 Bel Fuse Inc. Specifications subject to change without notice. 01.02
POWER PRODUCTS
NON-ISOLATED DC/DC CONVERTERS
BP01V7PA-03A
12V Input / 1.5 3.3V Output / 3A
page 4
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Note: All specifications are typical at nominal input, full load at 25 C unless otherwise stated.
3. di/dt = 0.5A/uS, Vin = 12VDC, Ta = 25 C, and with a 220F aluminum cap on output.
Output Specifications
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 Tel 201-432-0463 Fax 201-432-9542 www.belfuse.com
2002 Bel Fuse Inc. Specifications subject to change without notice. 01.02
POWER PRODUCTS
NON-ISOLATED DC/DC CONVERTERS
BP01V7PA-03A
12V Input / 1.5 3.3V Output / 3A
General Specifications
Control Specifications
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1. Vin=12V, full load and Ta=25 C.
page 5
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 Tel 201-432-0463 Fax 201-432-9542 www.belfuse.com
2002 Bel Fuse Inc. Specifications subject to change without notice. 01.02
POWER PRODUCTS
NON-ISOLATED DC/DC CONVERTERS
BP01V7PA-03A
12V Input / 1.5 3.3V Output / 3A
page 6
Efficiency Data
Module 3.3V
60%
65%
70%
75%
80%
85%
90%
95%
0.5 1.0 1.5 2.0 2.5 3.0
OUTPUT CURRENT
EFFICIENC
Y
10.8V
12.0V
13.2V
Module 1.5V
60.0%
65.0%
70.0%
75.0%
80.0%
85.0%
0.5 1.0 1.5 2.0 2.5 3.0
OUTPUT CURRENT
EFFICIENC
Y
10.8V
12.0V
13.2V
Module 2.5V
60.0%
65.0%
70.0%
75.0%
80.0%
85.0%
90.0%
0.5 1.0 1.5 2.0 2.5 3.0
OUTPUT CURRENT
EFFICIENC
Y
10.8V
12V
13.2V
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 Tel 201-432-0463 Fax 201-432-9542 www.belfuse.com
2002 Bel Fuse Inc. Specifications subject to change without notice. 01.02
POWER PRODUCTS
NON-ISOLATED DC/DC CONVERTERS
BP01V7PA-03A
12V Input / 1.5 3.3V Output / 3A
page 7
Ripple and Noise
Ripple and noise at full load and 12Vdc input and Ta=25 C
50% to 100% load transients at 12V input and Ta=25 C
100% to 50% load transients at 12V input and Ta=25 C
Transient Response
Transient response: di/dt = 0.5A/S, external load capacitance Co = 220F (electrolytic)
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 Tel 201-432-0463 Fax 201-432-9542 www.belfuse.com
2002 Bel Fuse Inc. Specifications subject to change without notice. 01.02
POWER PRODUCTS
NON-ISOLATED DC/DC CONVERTERS
BP01V7PA-03A
12V Input / 1.5 3.3V Output / 3A
Thermal Considerations
page 8
Derating Curve
150LFM
Natural
Convection
O
ut
p
ut Current
(A)
Output Current vs. Local Ambient
Temperature and Air Velocity
Ambient Temperature, Ta (C)
0C
10C
20C
30C
40C
50C
60C
70C
0
0.5
1.0
1.5
2.0
2.5
3.0
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
2001 Bel Fuse Inc. Specifications subject to change without notice. 12.01
POWER PRODUCTS
NON-ISOLATED DC/DC CONVERTERS
BP01V7PA-03A
12V Input / 1.5 3.3V Output / 3A
page 9
Mechanical
0.20
[5.08]
0.28
[7.11]
2.16 [54.86]
0.10 [2.54]
1.60 [40.64]
0.13
[3.30]
0.55
[13.97]
0.025
[0.64]
0.193
[4.90]
0.37
[9.40]
max
0.063
[1.60]
Dimensions are in inches [millimeters].
Standard dimension tolerance is 0.005 [0.13] unless otherwise noted.
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