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| NON-ISOLATED DC/DC CONVERTERS 3.3V Input / 5V Output / 1.5A SRAH-02C / VRAH-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 BP05xRAH-02C Description The Bel SRAH-02C and VRAH-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. *Optional 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% SRAH-02C500 VRAH-02C500 Note: For parts with Burst/skip mode disabled, change the last character to a B (e.g. SRAH-02C50B). (c)2005 Bel Fuse Inc. Specifications subject to change without notice. 03.05 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 BP05xRAH-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)2005 Bel Fuse Inc. Specifications subject to change without notice. 03.05 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 BP05xRAH-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)2005 Bel Fuse Inc. Specifications subject to change without notice. 03.05 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 BP05xRAH-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)2005 Bel Fuse Inc. Specifications subject to change without notice. 03.05 Ripple and noise when operating in burst mode 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 BP05xRAH-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 xRAH-02C (c)2005 Bel Fuse Inc. Specifications subject to change without notice. 03.05 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 BP05xRAH-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 xRAH-02C Trim Resistor Calculation Rtrim down = ( 44.144 - 12.5) Kohm Vo - Vo, adj Rtrim up = ( 8.4 - 2) Kohm Vo, adj - Vo (c)2005 Bel Fuse Inc. Specifications subject to change without notice. 03.05 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 BP05xRAH-02C Mechanical SRAH-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)2005 Bel Fuse Inc. Specifications subject to change without notice. 03.05 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 BP05xRAH-02C NON-ISOLATED DC/DC CONVERTERS 3.3V Input / 5V Output / 1.5A 0.700 [17.78] Mechanical VRAH-02C 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 RoHS Compliance Complies with the European Directive 2002/95/EC, calling for the elimination of lead and other hazardous substances from electronic products. These parts are not however compatible with the higher temperatures associated with lead free solder processes and must be soldered using a reflow profile with a peak temperature of no more than 240C. (c)2005 Bel Fuse Inc. Specifications subject to change without notice. 03.05 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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