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| NON-ISOLATED DC/DC CONVERTERS 3.3 V Input 5 V/4 A Output SRDB-04C500 * * * * Non-Isolated High Efficiency Fixed Frequency (530 kHz) Low Profile Package (8.5 mm) RoHS Compliant * * Remote Sense Allows Burst Mode Operation at Low Load Currents Description The SRDB-04C500 is part of the low cost non-isolated dc/dc series. The module uses a DIP package for ease of layout and space savings, with a low profile of 8.5mm. The output is closely regulated and the efficiency is typically 92% at full load. The unit is designed to be highly efficient and cost-effective. Features include remote sense, output voltage adjustment and burst mode at light load. Part Selection Output Voltage 5V Input Voltage 3.3 V Max. Output Current 4A Max. Output Power 20 W Typical Efficiency 92% Model Number SRDB-04C500 Note: Add "R" suffix at the end of the model number to indicate "Reel Packaging", and "G" for "Tray Packaging". Absolute Maximum Ratings Parameter Input Voltage (continuous) Ambient Temperature Storage Temperature Min 2.8 V 0 C -40 C Typ Max 4V 70 C 125 C Notes Input Specifications Parameter Input Voltage Input Current (full load) Input Reflected Ripple Current (pk-pk) Input Reflected Ripple Current (rms) I t Inrush Current Transient Turn-on Voltage Threshold 2 Min 3V - Typ 120 mA 25 mA 0.02 A s 2.8 V 2 Max 3.6 V 8.5 A 200 mA 50 mA 0.05 A s 2.9 V 2 Notes Tested with simulated source impedance of 500 nH, 5 Hz to 20 MHz; 270 uF/16 V capacitors with ESR=0.018 ohm max. at 100KHz Note: All specifications are typical 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 3.3 V Input 5 V/4 A Output Output Specifications Parameter Output Voltage Set Point Line Regulation Load Regulation Regulation Over Temperature (0 C to 70 C) Ripple and Noise (rms) 1 Min 4.85 V 1 Typ 5.0 V 20 mV 30 mV 20 mV 15 mV 100 mV 70 mV 30 mS 0% Max 5.15 V 40 mV 60 mV 30 mV 25 mV 100 mV 4A 50 mS 5% 2000 uF Notes Vin=3.3 V, full load Ripple and Noise (pk-pk) Output Current Rise Time Overshoot at Turn on Output Capacitance Transient Response 50% ~ 100% Max Load 100% ~ 50% Max Load 0A 0 uF Burst Mode; Io=0 A Fixed frequency; Io=4 A Overshoot Settling Time Overshoot Settling Time VO=5 V - 100 mV 60 uS 100 mV 60 uS 150 mV 120 uS 150 mV 120 uS Tested at di/dt=0.5 A/us, Vin=3.3 Vdc, without external load capacitance 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; recommend a 220 uF capacitor at output if the module operates at bust mode (light load). General Specifications Parameter Efficiency Switching Frequency Output Voltage Trim Range Remote Sense Compensation MTBF Dimensions Inches millimeters Weight 1.22 x 0.827 x 0.345 30.99 x 21.0 x 8.76 11 g Min 88% 460 kHz 90% Vo Typ 92% 530 kHz 7,600,000 hours Max 630 kHz 110% Vo 10% Typical at nominal input, full load at 25 C unless otherwise stated. Calculated Per Bell Core SR-332 (Vin= 3.3 V; Vo=5 V; IO = 3.2 A; Ta = 25 C) Notes Vin=3.3 V, full load Note: All specifications are typical 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 3.3 V Input 5 V/4 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 = 12.109 - 8.79 Vnom - Vadj Rtrim-down Module Trim GND Vout Rtrim - up = 3.82 - 5.62 Vadj - Vnom Module Trim Rtrim-up GND Note: For Trim Up, the output voltage Vnom = 5.025 V Efficiency Data 95.0% 90.0% Efficiency 85.0% 80.0% 75.0% 70.0% 0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 Output Current (A) 3.0 V 3.3 V 3.6 V Vo=5 V 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 3.3 V Input 5 V/4 A Output Thermal Derating Curve SRDB-04C500 . 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 3.3 V Input 5 V/4 A Output Pin Connections Pin 1 2 3 4 5 6 7 8 9 10 11 12 Function Trim N/A Remote Sense(+) Vo Vo Vo Ground Ground Ground Vin Vin Vin 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)2005 Bel Fuse Inc. Specifications subject to change without notice. 091905 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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