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NON-ISOLATED DC/DC CONVERTERS
12V Input / 1.5 - 3.3V Output / 3A V7PA-03A Series
* * * * * * * Nonisolated Fixed frequency High efficiency means less power dissipation Optimized for cost Remote on/off Undervoltage lockout Over current and short circuit protection
POWER PRODUCTS
BP01V7PA-03A
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
* * * Telecommunications Networking Computers and peripherals
Part Number Selection
Output Voltage 3.3V 2.5V 1.5V Input Voltage 12V 12V 12V Max. Output Current 3A 3A 3A Max. Output Power 10W 7.5W 4.5W Typical Efficiency 89% 86% 82% Part Number V7PA-03A330 V7PA-03A250 V7PA-03A150
(c)2002 Bel Fuse Inc. Specifications subject to change without notice. 01.02
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
BP01V7PA-03A
NON-ISOLATED DC/DC CONVERTERS
12V Input / 1.5 - 3.3V Output / 3A
Absolute Maximum Ratings
Parameter Continuous Input Voltage Output Enable Terminal Voltage Ambient Temperature Storage Temperature Symbol Vin Vouten Tamb Tstor Min -0.3 -0.3 0 -40 Typical Max 15 15 70 100 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 No Load Input Current Remote Off Input Current Input Reflected Ripple Current1 Input Reflected Ripple Current (P-P)1 I2t Inrush Current Transient Turn On Voltage Threshold Turn Off Voltage Threshold 8 3 20 65 0.03 9.7 8.8 10 Symbol Vin Iin Min 10.8 Typical Max 13.2 1.3 50 15 30 100 0.06 Units V A mA mA mArms mApk A2s V V
Note: Input capacitance 270F/16V, ESR = 0.03 max at 100kHz @ 25 C. 1. With simulated source impedance of 500nH, 5Hz to 20MHz.
(c)2002 Bel Fuse Inc. Specifications subject to change without notice. 01.02
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
12V Input / 1.5 - 3.3V Output / 3A
POWER PRODUCTS
BP01V7PA-03A
Output Specifications
Parameter Output Voltage Set Point1 3.3V 2.5V 1.5V Load Regulation 3.3V 2.5V 1.5V Line Regulation Regulation Over Temperature 0 - 70 C All 7 5 3 3 16 10 10 10 mV mV 3.3V 2.5V 1.5V 5 5 5 45 35 20 mV 3.3V 2.5V 1.5V Output Ripple and Noise2 Output Ripple and Noise2 Output Current Range Output DC Current Limit Short Circuit Surge 3.3V 2.5V 1.5V Turn on Time Overshoot at Turn On Output Capacitance All All All Cout 220 Ton All All All All Iout Ioutlim Ioutsurge 0.005 0.012 0.017 40 0 0.010 0.024 0.034 60 3 1500 ms % F 0 3.6 15 8 8 70 19 70 55 40 100 25 3 7.5 mVp-p mVrms A A A2s Module Symbol Vout 3.247 2.460 1.476 3.3 2.5 1.5 3.353 2.540 1.524 mV Min Typical Max Units V
Total Output Voltage Regulation
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.
(c)2002 Bel Fuse Inc. Specifications subject to change without notice. 01.02
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
BP01V7PA-03A
NON-ISOLATED DC/DC CONVERTERS
12V Input / 1.5 - 3.3V Output / 3A
Output Specifications
Parameter Transient Response3 V 50% to 100% of Max Load Settling Time V 100% to 50% of Max Load Settling Time Transient Response3 V 50% to 100% of Max Load Settling Time V 100% to 50% of Max Load Settling Time Transient Response3 V 50% to 100% of Max Load Settling Time V 100% to 50% of Max Load Settling Time 1.5V 46 Ts 52 165 100 mV s Ts 58 50 165 100 mV s 2.5V 48 Ts 80 165 100 mV s Ts 58 80 165 100 mV s 3.3V 70 Ts 60 165 100 mV s Ts 70 60 165 100 mV s Module Symbol Min Typical Max Units
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.
(c)2002 Bel Fuse Inc. Specifications subject to change without notice. 01.02
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
12V Input / 1.5 - 3.3V Output / 3A
POWER PRODUCTS
BP01V7PA-03A
General Specifications
Parameter Efficiency1 3.3V 2.5V 1.5V Switching Frequency 3.3V 2.5V 1.5V Output Voltage Trim Range 3.3V 2.5V 1.5V Remote Sense Compensation Weight All All 70 70 90 N/A 6.3 110 110 120 V g Fsw 255 255 195 300 300 230 345 345 265 % Module Symbol 86 83 79 89 86 82 kHz Min Typical Max Units %
1. Vin=12V, full load and Ta=25 C.
Control Specifications
Parameter Remote On/Off Signal Low (Unit Off) Signal High (Unit On) Module All All All Symbol Vouten -0.3 2.8 0.3 13.2 Min Typical Max Units V V V
(c)2002 Bel Fuse Inc. Specifications subject to change without notice. 01.02
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
BP01V7PA-03A
NON-ISOLATED DC/DC CONVERTERS
12V Input / 1.5 - 3.3V Output / 3A
Module 3.3V 95% 90% 85% 80% 75% 70% 65% 60% 0.5 1.0 1.5 2.0 2.5 3.0 OUTPUT CURRENT
Efficiency Data
EFFICIENCY
10.8V 12.0V 13.2V
Module 2.5V
90.0% 85.0% EFFICIENCY 80.0% 75.0% 70.0% 65.0% 60.0% 0.5 1.0 1.5 2.0 2.5 3.0 OUTPUT CURRENT
10.8V 12V 13.2V
Module 1.5V 85.0% EFFICIENCY 80.0% 75.0% 70.0% 65.0% 60.0% 0.5 1.0 1.5 2.0 2.5 3.0 OUTPUT CURRENT
(c)2002 Bel Fuse Inc. Specifications subject to change without notice. 01.02
10.8V 12.0V 13.2V
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
12V Input / 1.5 - 3.3V Output / 3A
POWER PRODUCTS
BP01V7PA-03A
Ripple and Noise
Ripple and noise at full load and 12Vdc input and Ta=25 C
Transient Response
Transient response: di/dt = 0.5A/S, external load capacitance Co = 220F (electrolytic)
50% to 100% load transients at 12V input and Ta=25 C
100% to 50% load transients at 12V input and Ta=25 C
(c)2002 Bel Fuse Inc. Specifications subject to change without notice. 01.02
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
BP01V7PA-03A
NON-ISOLATED DC/DC CONVERTERS
12V Input / 1.5 - 3.3V Output / 3A
Thermal Considerations
Derating Curve 3.0 2.5
Output Current (A)
150LFM
2.0 1.5 1.0 0.5 0 0C 10C 20C 30C 40C 50C 60C 70C
Natural Convection
Ambient Temperature, Ta (C) Output Current vs. Local Ambient Temperature and Air Velocity
(c)2002 Bel Fuse Inc. Specifications subject to change without notice. 01.02
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 * Tel 201-432-0463 * Fax 201-432-9542 * www.belfuse.com page 8
NON-ISOLATED DC/DC CONVERTERS
12V Input / 1.5 - 3.3V Output / 3A
POWER PRODUCTS
BP01V7PA-03A
Mechanical
0.37 [9.40] max 0.20 [5.08] 2.16 [54.86] 0.55 [13.97] 0.063 [1.60]
0.025 [0.64] 0.28 [7.11] 0.10 [2.54] 1.60 [40.64] 0.13 [3.30] 0.193 [4.90]
Dimensions are in inches [millimeters]. Standard dimension tolerance is 0.005 [0.13] unless otherwise noted.
Pin 1 2 3 4 5 6 7 8
Function Trim +Vo +Vo Ground Ground Ground +Vin Remote On/Off
12345
678
(c)2001 Bel Fuse Inc. Specifications subject to change without notice. 12.01
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 9

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