NON-ISOLATED DC/DC CONVERTERS 3.0 V-3.6 V Input 5.0 V/3 A Output x7AH-03C500 • Non-Isolated • High Efficiency • Fixed Frequency (530 kHz) • Low Profile Package • Allows Burst Mode Operation at Low Load Currents • Trim Function (Option) Description The Bel x7AH-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 Input Voltage Max. Output Current Max. Output Power Typical Efficiency Part Number Surface Mount Part Number Vertical Mount 5.0 V 3.0 V – 3.6 V 3A 15 W 90% S7AH-03C500 V7AH-03C500 Note: Add “0” suffix at the end of the model number to indicate “Tube Packaging”, and “R” for “Reel Packaging”, and “G” for “Tray Packaging”. Absolute Maximum Ratings Min Typ Max Input Voltage (continuous) Parameter 2.8 V - 4.0 V Ambient Temperature 0 °C - 70 °C Storage Temperature -40 °C - 125 °C Notes Input Specifications Parameter Min Typ Max Input Voltage 3.0 V - 3.6 V Input Current - - 6.3 A - 30 mA 60 mA - 100 mA 150 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 Reflected Ripple Current (rms) Input Reflected Ripple Current (pk-pk) 2 2 Notes 2 Note: The input reflected ripple current is measured 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. 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/3 A Output Output Specifications Parameter Min Typ Max 4.875 V 5.0 V 5.125 V Load Regulation - 25 mV 50 mV Line Regulation - 20 mV 40 mV Regulation Over Temperature (0 °C to 70 °C) - 20 mV 30 mV 0A - 3A - 15 mV 25 mV - 100 mV 70 mV 100 mV Rise Time - 30 mS 50 mS Overshoot at Turn on - 0% 5% 0 uF - 1500 uF - 100 mV 150 mV - 50 uS 120 uS - 100 mV 150 mV - 50 uS 120 uS Output Voltage Set Point Output Current 1 Ripple and Noise (RMS) Notes 1 Ripple and Noise (pk-pk) 2 Burst Mode Fixed Frequency Output Capacitance Io = 0 A Io = 3 A Transient Response 50% ~ 100% Max Load Settling Time 100% ~ 50% Max Load VO=5 V Settling Time 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 Min Typ Max 87% 90% - Switching Frequency 460 kHz 530 kHz 630 kHz Output Trim Range 90% VO - 110% VO Notes Efficiency VO=5.0 V MTBF Dimensions (surface mount) Inches (L × W × H) Millimeters (L × W × H) Dimensions (vertical) Inches (L × W × H) Millimeters (L × W × H) Weight Calculated Per Bell Core TR-332 (Vin=3.3 V; Vo=5 V; IO = 2.4 A; Ta = 25 °C) 8,100,000 hours 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 V-3.6 V Input 5.0 V/3 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 12.033 − 7.8) Vo − Vadj 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 Vo=5.0V efficiency curve Efficiency 90.0% 3.0 V 3.3 V 3.6 V 85.0% 80.0% 75.0% 0.300 0.750 1.500 2.250 3.000 Iout (A) 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/3 A Output Thermal Derating Curve x7AH-03C500 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/3 A Output S7AH-03C500 bel Pin Connections V7AH-03C500 Pin Function 1 N/A 2 Vin 3 Ground 4 Vout 5 Trim 6 N/A 7 N/A bel bel Pin Connections Pin Function 1 N/A 2 Vin 3 Ground 4 Vout 5 Trim 2005 Bel Fuse Inc. Specifications subject to change without notice. 040805 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