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| NON-ISOLATED DC/DC CONVERTERS 3.0 Vdc - 3.6 Vdc Input 5.0 Vdc/3 A Output xRAH-03C500 * * * * Non-Isolated High Efficiency RoHS Compliant * * * Rev.A Allows Burst Mode Operation at Low Load Currents Trim Function (Option) UL60950-1 Recognized (UL/cUL) Fixed Frequency (530 kHz) Low Profile Package Description The Bel xRAH-03C500 is a part of the low cost non-isolated dc/dc converter series. The modules use a SMD or SIP package for ease of layout and space savings. The output is closely regulated and the efficiency is typically 90% at full load. Part Selection Output Voltage 5.0 Vdc Input Voltage 3.0 Vdc - 3.6 Vdc Max. Output Current 3A Max. Output Power 15 W Typical Efficiency 90% Part Number Surface Mount SRAH-03C500 Part Number Vertical Mount VRAH-03C500 Notes: 1. Add "0" suffix at the end of the model number to indicate "Tube Packaging", and "R" for "Reel Packaging", and "G" for "Tray Packaging". 2. All part numbers above indicate RoHS 6. Change the second letter "R" to "7" for RoHS 5 part numbers. Absolute Maximum Ratings Parameter Input Voltage (continuous) Ambient Temperature Storage Temperature Min 2.8 V 0 C -40 C Typ Max 4.0 V 70 C 125 C Notes Input Specifications Parameter Input Voltage Input Current Input Reflected Ripple Current (rms) Input Reflected Ripple Current (pk-pk) I t Inrush Current Transient Turn-on Voltage Threshold 2 Min 3.0 V - Typ 30 mA 100 mA 0.02 A s 2.8 V 2 Max 3.6 V 6.3 A 60 mA 150 mA 0.05 A s 2.9 V 2 Notes With simulated source impedance of 500 nH, 5 Hz to 20 MHz; Use one 270 uF/16 V capacitor with ESR = 0.018 ohm max. at 100KHz at 25 C. Note: All specifications are typical at nominal input, full load at 25 C unless otherwise stated. Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 * Tel 201-432-0463 * Fax 201-432-9542 * www.belfuse.com NON-ISOLATED DC/DC CONVERTERS 3.0 Vdc - 3.6 Vdc Input 5.0 Vdc/3 A Output Output Specifications Parameter Output Voltage Set Point Load Regulation Line Regulation Regulation Over Temperature (0 C to 70 C) Output Current Ripple and Noise (rms) Ripple and Noise (pk-pk) 1 1 Min 4.875 V 0A 2 Typ 5.0 V 25 mV 20 mV 20 mV 15 mV 100 mV 70 mV 30 mS 0% 100 mV 50 uS 100 mV 50 uS Max 5.125 V 50 mV 40 mV 30 mV 3A 25 mV 100 mV 50 mS 5% 1500 uF 150 mV 120 uS 150 mV 120 uS Io = 0 A Io = 3 A Notes Vin=3.3 V, Iout=full load Burst Mode Fixed Frequency Rise Time Overshoot at Turn on Output Capacitance Transient Response 50% ~ 100% Max Load Settling Time 100% ~ 50% Max Load Settling Time VO=5 V 0 uF - di/dt = 0.5 A/uS; Vin = 3.3 V; Ta = 25 C without external capacitor Notes: All specifications are typical at nominal input, full load at 25 C unless otherwise stated. 1. Test condition of the output ripple and noise: 0-20 MHz BW. 2. Recommend a 220 uF capacitor at output if the module operates at burst mode (light load). General Specifications Parameter Efficiency VO=5.0 V Switching Frequency Output Trim Range MTBF Dimensions (surface mount) Inches (L x W x H) Millimeters (L x W x H) Dimensions (vertical) Inches (L x W x H) Millimeters (L x W x H) Weight 87% 460 kHz 90% VO 90% 530 kHz 8,100,000 hours 630 kHz 110% VO Calculated Per Bell Core SR-332 (Vin=3.3 V; Vo=5 V; IO = 2.4 A; Ta = 25 C) Min Typ Max Notes 0.78 x 0.7 x 0.32 19.81 x 17.78 x 8.13 0.7 x 0.308 x 0.65 17.78 x 7.82 x 16.51 5.2 g - Note: All specifications are typical at nominal input, full load at 25 C unless otherwise stated. Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 * Tel 201-432-0463 * Fax 201-432-9542 * www.belfuse.com NON-ISOLATED DC/DC CONVERTERS 3.0 Vdc - 3.6 Vdc Input 5.0 Vdc/3 A Output Output Trim Equations Equations for calculating the trim resistor (in k) given the desired adjusted voltage (Vadj) and the nominal output voltage of the converter (Vnom) are shown below. The Trim Down resistor should be connected between the Trim pin and Vout. The Trim Up resistor should be connected between the Trim pin and Ground. Only one of the resistors should be used for any given application. Vout Rtrim - down = ( 12.033 - 7.8) Vo - Vadj Rtrim-down Module Trim GND Vout Rtrim- up 3.808 =( - 4.64) Vadj - Vo Module Trim Rtrim-up GND Note: Output voltage Vo=5.0128 V when Rtrim is open. Efficiency Data Efficiency curve 93.0% 91.0% 89.0% 87.0% 85.0% 83.0% 81.0% 79.0% 77.0% 75.0% 0.30 0.75 1.50 2.25 Output Current (A) 3.00 Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 * Tel 201-432-0463 * Fax 201-432-9542 * www.belfuse.com Efficiency 3.0 V 3.3 V 3.6 V NON-ISOLATED DC/DC CONVERTERS 3.0 Vdc - 3.6 Vdc Input 5.0 Vdc/3 A Output Thermal Derating Curve xRAH-03C500 Ripple and Noise Waveform Note: Ripple and noise at full load, 3.3 Vdc input, 5 Vdc output and Ta=25 deg C. Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 * Tel 201-432-0463 * Fax 201-432-9542 * www.belfuse.com NON-ISOLATED DC/DC CONVERTERS 3.0 Vdc - 3.6 Vdc Input 5.0 Vdc/3 A Output Transient Response Waveforms Transients 50% to 100% load, 3.3 Vdc Input ,5 Vdc Output, Transients 100% to 50% load, 3.3 Vdc Input, 5 Vdc Output Note: Transient response at di/dt=0.5 A/uS, without external load capacitor, Ta=25 deg C. Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 * Tel 201-432-0463 * Fax 201-432-9542 * www.belfuse.com NON-ISOLATED DC/DC CONVERTERS 3.0 Vdc - 3.6 Vdc Input 5.0 Vdc/3 A Output Mechanical Outline SRAH-03C500 Pin Connections bel Pin 1 2 3 4 5 6 7 Function N/A Vin Ground Vout Trim (option) N/A N/A VRAH-03C500 Pin Connections bel Pin 1 2 3 4 5 Function N/A Vin Ground Vout Trim (option) bel 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 240 C. (c)2007 Bel Fuse Inc. Specifications subject to change without notice. 010907 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 |
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