NON-ISOLATED DC/DC CONVERTERS 3.3 V Input 5 V/4 A Output SRDB-04C500 RoHS Compliant • Non-Isolated • Remote Sense • High Efficiency • • Fixed Frequency (530 kHz) Allows Burst Mode Operation at Low Load Currents • Low Profile Package (8.5 mm) 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 Input Voltage Max. Output Current Max. Output Power Typical Efficiency Model Number 5V 3.3 V 4A 20 W 92% 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 Min Typ Max Input Voltage (continuous) Parameter 2.8 V - 4V Ambient Temperature 0 °C - 70 °C Storage Temperature -40 °C - 125 °C Notes Input Specifications Parameter Min Typ Max 3V - 3.6 V Input Current (full load) - - 8.5 A Input Reflected Ripple Current (pk-pk) - 120 mA 200 mA Input Reflected Ripple Current (rms) - 25 mA 50 mA I t Inrush Current Transient - 0.02 A s 0.05 A s Turn-on Voltage Threshold - 2.8 V 2.9 V Input Voltage 2 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 2 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 Min Typ Max 4.85 V 5.0 V 5.15 V Line Regulation - 20 mV 40 mV Load Regulation - 30 mV 60 mV Regulation Over Temperature (0 °C to 70 °C) - 20 mV 30 mV 25 mV Output Voltage Set Point Ripple and Noise (rms) 1 - 15 mV - 100 mV - 70 mV 100 mV 0A - 4A Rise Time - 30 mS 50 mS Overshoot at Turn on - 0% 5% Ripple and Noise (pk-pk) 1 Output Current Output Capacitance 0 uF Notes Vin=3.3 V, full load Burst Mode; Io=0 A Fixed frequency; Io=4 A 2000 uF Transient Response 50% ~ 100% Max Load 100% ~ 50% Max Load Overshoot Settling Time Overshoot VO=5 V Settling Time - 100 mV 150 mV - 60 uS 120 uS - 100 mV 150 mV - 60 uS 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 Min Typ Max 88% 92% - Switching Frequency 460 kHz 530 kHz 630 kHz Output Voltage Trim Range 90% Vo - 110% Vo - - 10% Efficiency Remote Sense Compensation MTBF Notes Vin=3.3 V, full load 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) 7,600,000 hours Dimensions Inches millimeters Weight 1.22 x 0.827 x 0.345 30.99 x 21.0 x 8.76 - 11 g - 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 kΩ) 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 = Rtrim-down 12.109 − 8.79 Vnom − Vadj 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% Efficiency 90.0% 3.0 V 3.3 V 3.6 V 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) 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 Function 1 Trim 2 N/A 3 Remote Sense(+) 4 Vo 5 Vo 6 Vo 7 Ground 8 Ground 9 Ground 10 Vin 11 Vin 12 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 ºC. ©2005 Bel Fuse Inc. Specifications subject to change without notice. 091905 CORPORATE FAR EAST EUROPE Bel Fuse Inc. 206 Van Vorst Street Jersey City, NJ 07302 Tel 201-432-0463 Fax 201-432-9542 www.belfuse.com 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 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