Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 Tel 201-432-0463 Fax 201-432-9542 www.belfuse.com
2003 Bel Fuse Inc. Specifications subject to change without notice. 07.03
POWER PRODUCTS
NON-ISOLATED DC/DC CONVERTERS
BP03x7AH-02C
3.3V Input / 5V Output / 1.5A
Nonisolated
Compact, low profile surface mount package
Fixed frequency*
High efficiency means less power dissipation
Excellent thermal performance
Optimized for cost
Allows burst mode operation at low load currents
Description
The Bel S7AH-02C and V7AH-02C modules are non-isolated, step up DC/DC power converters that operate from a nominal
3.3V source with an output voltage of 5V. They are packaged in a compact, overmolded package rated at 1.5A. Optional lead
forming provides a vertical mount product for minimal footprint or a surface mount option for a very low profile. Standard
features include output voltage adjust and industrial temperature range (-40 to +85 C). The output is closely regulated and
the efficiency is typically 87% at full load. These products may be used almost anywhere low voltage silicon is employed and a
3.3V source is available. Typical applications include file servers, routers, line cards and other computing and communications
equipment.
*Burst/skip mode operating at light load or no load.
Applications
page 1
S7AH-02C / V7AH-02C Modules
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
2003 Bel Fuse Inc. Specifications subject to change without notice. 07.03
POWER PRODUCTS
NON-ISOLATED DC/DC CONVERTERS
BP03x7AH-02C
3.3V Input / 5V Output / 1.5A
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
2003 Bel Fuse Inc. Specifications subject to change without notice. 07.03
POWER PRODUCTS
NON-ISOLATED DC/DC CONVERTERS
BP03x7AH-02C
3.3V Input / 5V Output / 1.5A
page 3
Output Specifications
Note: All specifications are typical at nominal input, full load at 25 C unless otherwise stated.
1. Vin = 3.3V, Iout = full load, Ta = 25 C.
2. 0 - 20MHz, 1F ceramic cap on output.
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General Specifications
1. Vin=3.3V, full load and Ta=25 C.
2. See graphs on page 6.
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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
2003 Bel Fuse Inc. Specifications subject to change without notice. 07.03
POWER PRODUCTS
NON-ISOLATED DC/DC CONVERTERS
BP03x7AH-02C
3.3V Input / 5V Output / 1.5A
page 4
Efficiency Data
Ripple and Noise
Ripple and noise at full load and 3.3Vdc input,
5Vdc output and Ta=25 C
1F ceramic cap at the output.
Ripple and noise at no load and 3.3Vdc input,
5Vdc output and Ta=25 C
Module 5.0V
82%
83%
84%
85%
86%
87%
88%
89%
0.150
0.375
0.750
1.125
1.500
Output current (A)
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3.0V
3.3V
3.6V
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 Tel 201-432-0463 Fax 201-432-9542 www.belfuse.com
2003 Bel Fuse Inc. Specifications subject to change without notice. 07.03
POWER PRODUCTS
NON-ISOLATED DC/DC CONVERTERS
BP03x7AH-02C
3.3V Input / 5V Output / 1.5A
page 5
Transient Response
Transient response: di/dt = 0.5A/S, no external load capacitance
Vout=5V
50% to 100% load transients at 3.3V input and Ta=25 C
Vout=5V
100% to 50% load transients at 3.3V input and Ta=25 C
Thermal Considerations
x7AH-02C
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 Tel 201-432-0463 Fax 201-432-9542 www.belfuse.com
2003 Bel Fuse Inc. Specifications subject to change without notice. 07.03
POWER PRODUCTS
NON-ISOLATED DC/DC CONVERTERS
BP03x7AH-02C
3.3V Input / 5V Output / 1.5A
page 6
Output Voltage Set-Point Adjustment
x7AH-02C Trim Resistor Calculation
Rtrim up =
8.4
Vo, adj Vo
2
)
Kohm
(
Rtrim down =
44.144
Vo Vo, adj
12.5
)
Kohm
(
Vout
Trim
Gnd
Vout
Trim
Gnd
Trim Down Circuit
Trim Up Circuit
Module
Rtrim Up
Rtrim Down
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 Tel 201-432-0463 Fax 201-432-9542 www.belfuse.com
2003 Bel Fuse Inc. Specifications subject to change without notice. 07.03
POWER PRODUCTS
NON-ISOLATED DC/DC CONVERTERS
BP03x7AH-02C
3.3V Input / 5V Output / 1.5A
page 7
Mechanical
S7AH-02C
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
2003 Bel Fuse Inc. Specifications subject to change without notice. 07.03
POWER PRODUCTS
NON-ISOLATED DC/DC CONVERTERS
BP03x7AH-02C
3.3V Input / 5V Output / 1.5A
page 8
Mechanical
V7AH-02C
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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