NON-ISOLATED DC/DC CONVERTERS 3 Vdc - 3.6 Vdc Input 12 Vdc/0.8 A & 15 Vdc/0.6 A Output xRAH-01CXx0 Series RoHS Compliant Rev.A • Non-Isolated • Trim Function (option) • High Efficiency • • Fixed Frequency (550 kHz) Allows Burst Mode Operation at Low Load Currents • Low Profile Package • UL60950-1 Recognized (UL/cUL) Description The Bel xRAH-01CXx0 is part of the low cost non-isolated dc/dc converter series. The modules use a SMD or SIP package or vertical package for ease of layout and space savings. The output is closely regulated and the efficiency of 12 Vdc output module is typically 86% at full load. Typical features include allows burst mode operation at low load currents and trim function (option). Part Selection Output Voltage Input Voltage Max. Output Current Max. Output Power Typical Efficiency Part Number Surface Mount Part Number Vertical Mount 12 V 3 V - 3.6 V 0.8 A 9.6 W 86% SRAH-01CX20 VRAH-01CX20 15 V 3 V - 3.6 V 0.6 A 9.0 W 85% SRAH-01CX50 VRAH-01CX50 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 Min Typ Max Input Voltage (continuous) Parameter 2.8 V - 4V Ambient Temperature -40 °C - 85 °C Storage Temperature -40 °C - 125 °C Notes Input Specifications Parameter Min Typ Max 3V - 3.6 V - 15 mA - - - 4.3 A 4A Input Reflected Ripple Current (pk-pk) - 100 mA 150 mA Input Reflected Ripple Current (rms) - 30 mA 60 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 Input Current (no load) Notes Input Current (full load) VO=12V VO=15V 2 2 With simulated source impedance of 500 nH, 5 Hz to 20 MHz; Use 270 uF/16 V capacitor with ESR = 0.018 ohm max. at 100KHz at 25 °C 2 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 Vdc - 3.6 Vdc Input 12 Vdc/0.8 A & 15 Vdc/0.6 A Output Output Specifications Parameter Min Typ Max VO=12 V VO=15 V 11.58 V 14.475 V 12 V 15 V 12.42 V 15.525 V VO=12 V VO=15 V - 20 mV 20 mV 40 mV 40 mV VO=12 V VO=15 V - 60 mV 75 mV 120 mV 150 mV VO=12 V VO=15 V - 45 mV 60 mV 80 mV 100 mV VO=12 V VO=15 V 0A 0A - 0.8 A 0.6 A VO=12 V; IO=0 A VO=15 V; IO=0 A VO=12 V; IO=0.8 A VO=15 V; IO=0.6 A - 25 mV 25 mV 25 mV 35 mV 50 mV 50 mV 50 mV 60 mV VO=12V; IO=0A VO=15V; IO=0A VO=12V; IO=0.8A VO=15V; IO=0.6A - 85 mV 100 mV 60 mV 100 mV 120 mV 150 mV 100 mV 150 mV Rise Time - 5 mS - Overshoot at Turn on - 0% 5% 33 uF - 330 uF Output Voltage Set Point Notes Test condition: Vin=3.3V, lout=full load Line Regulation Load Regulation Regulation Over Temperature (-40 °C to +85 °C) Output Current Ripple and Noise (rms) Ripple and Noise (pk-pk) Output Capacitance Test conditions: BW = 0-20 MHz; 1 uF Ceramic capacitor and 33 uF Tantalum capacitor at the output The min output capacitance is 33 uF Tantalum capacitor at the output Transient Response 50% ~ 100% Max Load 100% ~ 50% Max Load Overshoot Settling Time Overshoot Settling Time All Outputs - 130 mV 200 mV - 100 uS 200 uS - 130 mV 200 mV - 100 uS 200 uS di/dt = 0.1 A/uS; Vin = 3.3 V; and with 33 uF Tantalum capacitor at the output 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 Vdc - 3.6 Vdc Input 12 Vdc/0.8 A & 15 Vdc/0.6 A Output General Specifications Parameter Min Typ Max 82% 81% 86% 85% - Switching Frequency 500 kHz 550 kHz 650 kHz Output Trim Range 90% VO - 110% VO Notes Efficiency VO=12 V VO=15 V MTBF Measured at Vin=3.3 V, full load Calculated Per Bell Core SR-332 (Vin=3.3 V; Vo=12 V; IO = 0.64 A; Ta = 25 °C) 13,296,605 hours Dimensions (surface mount) Inches (L × W × H) Millimeters (L × W × H) Dimensions (vertical) Inches (L × W × H) Millimeters (L × W × H) Weight 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 25 °C unless otherwise stated. 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. Rtrim−down Vout A = −B Vnom − Vadj Rtrim-down Module Trim GND Rtrim−up = Vadj Vout C −D − Vnom Module Trim Rtrim-up GND Vnom A B C D 12 164.640 21.850 11.760 7.150 15.055 209.542 20.600 11.760 5.900 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 Vdc - 3.6 Vdc Input 12 Vdc/0.8 A & 15 Vdc/0.6 A Output Efficiency Data Efficiency Curve Efficiency Curve 86.0% 84.0% 3.0 V 3.3 V 3.6 V Efficiency Efficiency 88.0% 88.0% 87.0% 86.0% 85.0% 84.0% 83.0% 82.0% 81.0% 80.0% 79.0% 78.0% 0.08 3.0 V 3.3 V 3.6 V 82.0% 80.0% 78.0% 76.0% 74.0% 72.0% 70.0% 0.20 0.40 0.60 Output Current (A) xRAH-01CX20 0.80 0.06 0.15 0.30 0.45 0.60 Output Current (A) xRAH-01CX50 Thermal Derating Curves xRAH-01CX20 xRAH-01CX50 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 Vdc - 3.6 Vdc Input 12 Vdc/0.8 A & 15 Vdc/0.6 A Output Ripple and Noise Waveforms 3.3 Vdc input, 12 Vdc output 3.3 Vdc input, 15 Vdc output Note: Ripple and noise at full load, 1 uF ceramic cap and 33 uF tantalum cap at the output, and Ta=25 deg C. Transient Response Waveforms 50% to 100% load transient at Vin=3.3 V, Vo=12 V 100% to 50% load transient at Vin=3.3 V, Vo=12 V 50% to 100% load transient at Vin=3.3 V, Vo=15 V 100% to 50% load transient at Vin=3.3 V, Vo=15 V Note: Transient response at di/dt=0.1 A/uS, with an external 33 uF tantalum load cap at the 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 Vdc - 3.6 Vdc Input 12 Vdc/0.8 A & 15 Vdc/0.6 A Output Mechanical Outline SRAH-01CXx0 Pin Connections Pin 1 2 3 4 5 6 7 bel Function N/A Vin Ground Vout Trim (option) N/A N/A VRAH-01CXx0 Pin Connections bel bel Pin 1 2 3 4 5 Function N/A Vin Ground Vout Trim (option) 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. ©2007 Bel Fuse Inc. Specifications subject to change without notice. 011007 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