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 NON-ISOLATED DC/DC CONVERTERS
3.3V Input / 5V Output / 1.5A S7AH-02C / V7AH-02C Modules
* * * * * * * 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
POWER PRODUCTS
BP03x7AH-02C
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
* * * * Distributed power architectures Data networking equipment Telecommunications Computers and peripherals
Options
* Trim function
Part Number Selection
Output Voltage Input Voltage Max. Output Current Max. Output Power Typical Efficiency Part Number Surface Mount Part Number Vertical Mount
5V
3.3V
1.5A
7.5W
87%
S7AH-02C500
V7AH-02C500
(c)2003 Bel Fuse Inc.
Specifications subject to change without notice. 07.03
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 * Tel 201-432-0463 * Fax 201-432-9542 * www.belfuse.com page 1
POWER PRODUCTS
BP03x7AH-02C
NON-ISOLATED DC/DC CONVERTERS
3.3V Input / 5V Output / 1.5A
Absolute Maximum Ratings
Parameter Continuous Input Voltage Output Enable Terminal Voltage Ambient Temperature Storage Temperature Symbol Vin Vouten Tamb Tstor -40 -40 85 125 Min 2.8 Typical Max 4 Unit V V C C
Note: Use beyond the maximum ratings may cause a reliability degradation of the DC/DC converter or may permanently damage the device.
Input Specifications
Parameter Operating Input Voltage Input Current Input Reflected Ripple Current1 Input Reflected Ripple Current (P-P)1 I2t Inrush Current Transient Turn On Voltage Threshold Module All All All All All All Symbol Vin Iin 30 100 0.02 2.8 Min 3 Typical Max 3.6 3.3 60 150 0.05 2.9 Units V A mArms mApk A2s V
Note: Input capacitance one 270F/16V, ESR = 0.018 max at 100kHz @ 25 C. 1. With simulated source impedance of 500nH, 5Hz to 20MHz.
(c)2003 Bel Fuse Inc.
Specifications subject to change without notice. 07.03
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 * Tel 201-432-0463 * Fax 201-432-9542 * www.belfuse.com page 2
NON-ISOLATED DC/DC CONVERTERS
3.3V Input / 5V Output / 1.5A
POWER PRODUCTS
BP03x7AH-02C
Output Specifications
Parameter Output Voltage Set Point 1 Load Regulation Line Regulation Regulation Over Temperature Total Output Voltage Regulation Output Ripple and Noise 2 Output Ripple and Noise 2 Output Current Range Overshoot at Turn On Output Capacitance Transient Response V 50% to 100% of Max Load Settling Time All V 100% to 50% of Max Load Settling Time Ts 100 50 150 100 mV s Ts 100 50 150 100 mV s Module All All All All All All All All All All Cout 0 Iout 0 0 50 15 Symbol Vout Min 4.825 Typical 5 25 20 45 Max 5.175 40 30 80 150 100 25 1.5 5 600 Units V mV mV mV mV mVp-p mVrms A % F
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.
General Specifications
Parameter Efficiency1 Switching Frequency Output Voltage Trim Range2 Weight Module All All All All Symbol Fsw Min 84 500 95 5.2 Typical 87 550 650 110 Max Units % kHz %
g
1. Vin=3.3V, full load and Ta=25 C. 2. See graphs on page 6.
(c)2003 Bel Fuse Inc.
Specifications subject to change without notice. 07.03
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 * Tel 201-432-0463 * Fax 201-432-9542 * www.belfuse.com page 3
POWER PRODUCTS
BP03x7AH-02C
NON-ISOLATED DC/DC CONVERTERS
3.3V Input / 5V Output / 1.5A
Efficiency Data
Module 5.0V 89% 88% 87% Efficiency 86% 85% 84% 83% 82% 0.150 0.375 0.750 1.125 1.500 3.0V 3.3V 3.6V
Output current (A)
Ripple and Noise
1F ceramic cap at the output.
Ripple and noise at full load and 3.3Vdc input, 5Vdc output and Ta=25 C
(c)2003 Bel Fuse Inc. Specifications subject to change without notice. 07.03
Ripple and noise at no load and 3.3Vdc input, 5Vdc 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 page 4
NON-ISOLATED DC/DC CONVERTERS
3.3V Input / 5V Output / 1.5A
POWER PRODUCTS
BP03x7AH-02C
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
(c)2003 Bel Fuse Inc.
Specifications subject to change without notice. 07.03
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 * Tel 201-432-0463 * Fax 201-432-9542 * www.belfuse.com page 5
POWER PRODUCTS
BP03x7AH-02C
NON-ISOLATED DC/DC CONVERTERS
3.3V Input / 5V Output / 1.5A
Trim Down Circuit
Output Voltage Set-Point Adjustment
Vout
Rtrim Down
Trim
Gnd
Trim Up Circuit
Vout
Module
Trim
Rtrim Up
Gnd
x7AH-02C Trim Resistor Calculation
Rtrim down =
(
44.144 - 12.5) Kohm Vo - Vo, adj
Rtrim up =
(
8.4 - 2) Kohm Vo, adj - Vo
(c)2003 Bel Fuse Inc.
Specifications subject to change without notice. 07.03
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 * Tel 201-432-0463 * Fax 201-432-9542 * www.belfuse.com page 6
NON-ISOLATED DC/DC CONVERTERS
3.3V Input / 5V Output / 1.5A
POWER PRODUCTS
BP03x7AH-02C
Mechanical
S7AH-02C
Suggested PCB Pad Layout 0.400 [10.16] 0.065 [1.65]
0.60 [15.24]
0.050 [1.27]
0.855 [21.72]
0.110 [2.79]
0.70 [17.78]
R0.015 [R0.38] typ 0.100 [2.54] R0.008 [R0.20] typ
0.012 [0.30]
0-5
0.004 [0.10]
0.050 [1.27] 0.400 [10.16]
0.100 [2.54] 4x
0.320 [8.13] 0.020 [0.51]
0.055 [1.40] 2x 0.090 [2.29] 2x 0.780 [19.81]
Dimensions are in inches [millimeters]. Standard dimension tolerance is 0.005 [0.13] unless otherwise noted.
Pin 1 2 3 4 5 6 7
Function
7
N/A +Vin Ground +Vo Trim N/A N/A
6
12345
(c)2003 Bel Fuse Inc.
Specifications subject to change without notice. 07.03
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 * Tel 201-432-0463 * Fax 201-432-9542 * www.belfuse.com page 7
POWER PRODUCTS
BP03x7AH-02C
NON-ISOLATED DC/DC CONVERTERS
3.3V Input / 5V Output / 1.5A
Mechanical
V7AH-02C
0.700 [17.78]
0.600 [15.24]
0.050 [1.27]
0.265 [6.73] min
0.050 [1.27] 0.100 [2.54] 0.400 [10.16] 0.020 [0.51]
0.308 [7.82]
Dimensions are in inches [millimeters]. Standard dimension tolerance is 0.005 [0.13] unless otherwise noted.
Pin 1 2 3 4 5
Function N/A +Vin Ground +Vo Trim
12345
(c)2003 Bel Fuse Inc. Specifications subject to change without notice. 07.03
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
page 8


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