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| NON-ISOLATED DC/DC CONVERTERS 3.0 Vdc - 3.6 Vdc Input 5.0 Vdc/1.5 A Output xRAH-02C50x * * * * * Non-Isolated High Efficiency RoHS Compliant * Rev.A Fixed Frequency (550 kHz) Low Profile Package Trim Function (Option) * Allows Burst Mode Operation at Low Load Currents for xRAH02C500, Burst Mode Operation Disabled for Lower Output Ripple at Light Loads for xRAH-02C50B UL60950-1 Recognized (UL/cUL) Description The Bel xRAH-02C50x 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 87% at full load. Part Selection Output Voltage 5.0 Vdc Input Voltage 3.0 Vdc - 3.6 Vdc Max. Output Current 1.5 A Max. Output Power 7.5 W Typical Efficiency 87% Part Number Surface Mount SRAH-02C50x Part Number Vertical Mount VRAH-02C50x 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. Replace "x" with "0" to allow burst mode operation at low load currents, or with "B" to disable burst mode operation at light loads. 3. 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 -40 C -40 C Typ Max 4.0 V 85 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 3.3 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 100 kHz 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/1.5 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) Ripple and Noise (pk-pk) (No Load) xRAH-02C500 xRAH-02C50B Overshoot at Turn on Output Capacitance Transient Response 50% ~ 100% Max Load Settling Time 100% ~ 50% Max Load Settling Time VO=5 V 100 mV 50 uS 100 mV 50 uS 150 mV 100 uS 150 mV 100 uS di/dt = 0.5 A/uS; Vin = 3.3 V; Ta = 25 C without external capacitor Min 4.825 V 0A Typ 5.0 V 25 mV 20 mV 45 mV 15 mV 50 mV Max 5.175 V 40 mV 30 mV 80 mV 1.5 A 25 mV 100 mV 0-20MHz BW, with1uF ceramic capacitor at the output. Notes Vin=3.3V, Io= full load 0 uF 50 mV 18 mV 0% - 5% 600 uF Notes: All specifications are typical at nominal input, full load at 25 C unless otherwise stated. General Specifications Parameter Efficiency 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 Min 84% 500 kHz 95% VO Typ 87% 550 kHz 14,455,458 hours Max 650 kHz 110% VO Calculated Per Bell Core SR-332 (Vin=3.3 V; Vo=5 V; IO = 1.2 A; Ta = 25 C) Notes Vin=3.3V, full load 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/1.5 A Output Output Trim Equations Equations for calculating the trim resistor 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 44.144 Rtrim _ down = ( - 12.5) Kohm Vo - Vo, adj Rtrim-down Module Trim GND 8.4 - 2) Kohm Rtrim _ up = ( Vo, adj - Vo Module Vout Trim Rtrim-up GND Note: Output voltage Vo=5.004 V when Rtrim is open. Efficiency Data Efficiency Curve 89.0% 88.0% Efficiency 87.0% 86.0% 85.0% 84.0% 83.0% 82.0% 0.150 0.375 0.750 1.125 1.500 3.0 V 3.3 V 3.6 V Output Current (A) xRAH-02C500 Efficiency Curve 90.0% 88.0% Efficiency 86.0% 84.0% 82.0% 80.0% 78.0% 0.150 0.375 0.750 1.125 1.500 Output Current (A) 3.0 V 3.3 V 3.6 V xRAH-02C50B 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/1.5 A Output Thermal Derating Curve xRAH-02C50x Ripple and Noise Waveforms Ripple and noise at full load, Vin=3.3 V, Vo=5 V Ripple and noise at no load, Vin=3.3 V, Vo=5 V Note: Ripple and noise tested with 1 uF ceramic capacitor at the output, 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/1.5 A Output Transient Response Waveforms 50% to 100% load transient at Vin=3.3 V, Vo=5 V 100% to 50% load transient at Vin=3.3 V, Vo=5 V Note: Transient response at di/dt=0.5 A/uS, no 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 V - 3.6 V Input 5.0 V/1.5 A Output Mechanical Outline SRAH-02C50x Pin Connections bel Pin 1 2 3 4 5 6 7 Function N/A Vin Ground Vout Trim (option) N/A N/A VRAH-02C50x 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. 010807 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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