NON-ISOLATED DC/DC CONVERTERS 12 Vdc Input 0.9 Vdc - 3.3 Vdc/7 A Output xRAH-07A1A0 RoHS Compliant Rev.A • Non-Isolated • Remote On/Off • Fixed Frequency • Input Under Voltage Lockout • High Efficiency • OCP/SCP • High Power Density • Wide Range Trim • Low Cost • UL60950-1 Recognized (UL/cUL) Description The Bel xRAH-07A1A0 modules are a series of non-isolated, step down dc/dc converters that operate from a nominal 12 Vdc source. These converters are available in a range of output voltages from 0.9 Vdc to 3.3 Vdc. It is packaged in a compact, overmolded package rated at 7 A. Optional lead forming provides a vertical mount product for minimal footprint or a surface mount option for a very low profile. The output is closely regulated and the efficiency is typically 88% for 3.3 Vdc output at full load. Typical features include remote on/off, input under voltage lockout, over current protection and short circuit protection. Part Selection Output Voltage 0.9 Vdc - 3.3 Vdc Input Voltage 12 Vdc Max. Output Current 7A Max. Output Power 23.1 W Typical Efficiency 88% Part Number Surface Mount SRAH-07A1A0 Part Number Vertical Mount VRAH-07A1A0 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 Parameter Input Voltage (continuous) Output Enable Terminal Voltage Ambient Temperature Storage Temperature Min -0.3 V -0.3 V -40 °C -55 °C Typ - Max 15 V 14 V 85 °C 125 °C Notes Min 10 V - Typ - Max 14 V 100 mA Notes - 3 mA 3.0 A 2.6 A 1.9 A 1.6 A 1.3 A 1.0 A 10 mA Input Specifications Parameter Input Voltage Input Current (no load) Input Current (full load) VO=3.3 V VO=2.5 V VO=1.8 V VO=1.5 V VO=1.2 V VO=0.9 V Remote Off Input Current 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 12 Vdc Input 0.9 Vdc - 3.3 Vdc/7 A Output Input Specifications (continued) Parameter Min Typ Max Notes Tested with simulated source impedance of 500 nH, 5 Hz to 20 MHz and two 270 uF/16 V Oscon capacitors with ESR=0.018 ohm max. at 100 kHz Input Reflected Ripple Current (pk-pk) - 180 mA - Input Reflected Ripple Current (rms) - 50 mA - I t Inrush Current Transient - 2 0.01 A s 0.02 A s Turn on Voltage Threshold Turn off Voltage Threshold - 9.5 V 9.0 V 9.5 V 2 2 Output Specifications Parameter Output Voltage Set Point Min Typ Max VO=3.3 V VO=2.5 V VO=1.8 V VO=1.5 V VO=1.2 V VO=0.9 V 3.247 V 2.460 V 1.771 V 1.476 V 1.181 V 0.886 V - 3.3 V 2.5 V 1.8V 1.5 V 1.2 V 0.9 V ±3mV 3.353 V 2.540 V 1.829 V 1.524 V 1.219 V 0.914 V ±6mV VO=3.3 V VO=2.5 V VO=1.8 V VO=1.5 V VO=1.2 V VO=0.9 V - ±5 mV ±5 mV ±5 mV ±3 mV ±3 mV ±3 mV ±10 mV ±10 mV ±10 mV ±6 mV ±6 mV ±6 mV - 30 mV 50 mV 0A 10 A - 2 0.02 A s 7A 20 A 2 0.04 A s VO=3.3 V VO=2.5 V VO=1.8 V VO=1.5 V VO=1.2 V VO=0.9 V - 20 mV 20 mV 15 mV 15 mV 15 mV 10 mV 50 mV 50 mV 40 mV 40 mV 30 mV 30 mV VO=3.3 V VO=2.5 V VO=1.8 V VO=1.5 V VO=1.2 V VO=0.9 V 330 uF 70 mV 70 mV 60 mV 60 mV 60 mV 50 mV 8 mS 0% - 100 mV 100 mV 100 mV 80 mV 80 mV 70 mV 20 mS 3% 2800 uF - 120 mV 50 uS 120 mV 50 uS 180 mV 80 uS 180 mV 80 uS Line Regulation Load Regulation Regulation Over Temperature (-40 °C to +85 °C) Output Current Current Limit Threshold Short Circuit Surge Transient Ripple and Noise (rms) Ripple and Noise (pk-pk) Turn on Time Overshoot at Turn on Output Capacitance Transient Response Overshoot 50% ~ 100% Max Load Settling Time Overshoot 100% ~ 50% Max Load Settling Time All Notes Test conditions: Vin=12 V, Io=50% full load Test condition: 0-20 MHz BW, with a 330 uF/10 V Tantalum capacitor at the output. Test conditions: di/dt = 0.5 A/uS; Vin = 12 V; with a 330 uF/10 V 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 12 Vdc Input 0.9 Vdc - 3.3 Vdc/7 A Output General Specifications Parameter Min Typ Max Notes 85% 83% 80% 78% 75% 71% 88% 86% 83% 81% 78% 74% - 250 kHz 300 kHz 350 kHz - - 403% Vo 90% Vo - - 110% Vo 110% Vo Efficiency VO=3.3 V VO=2.5 V VO=1.8 V VO=1.5 V VO=1.2 V VO=0.9 V Switching Frequency Output Trim Range (wide trim) Output Trim Range (narrow trim) VO=1.2 V-3.3 V VO=0.9 V Dimensions (surface mount) Inches (L × W × H) Millimeters (L × W × H) Dimensions (vertical) Inches (L × W × H) Millimeters (L × W × H) Weight VO=0.9 V Calculated Per Bell Core SR-332 (Vin=12 V; Vo=3.3 V; IO = 5.6 A; Ta = 25°C) 8,202,646 hours MTBF Measured at Vin=12 V, full load and Ta=25 °C 0.78 x 0.70 x 0.32 19.81 x 17.78 x 8.13 0.70 x 0.308 x 0.65 17.78 x 7.82 x 16.51 - 5g - Control Specifications Parameter Min Typ Max Signal Low (Unit Off) -0.3 V - 1V Signal High (Unit On) 3.5 V - 14 V Notes Remote On/Off Remote on/off pin open, unit on. 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 Up resistor should be connected between the Trim pin and Ground. Rtrimup 6.06 = − 1.05 Vadj − Vnom Vout Module Trim Rtrimup GND Note: Output voltage Vo=0.9 V when Rtrimup is not connected. 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 12 Vdc Input 0.9 Vdc - 3.3 Vdc/7 A Output Efficiency Data Efficiency Efficiency Curve 95.0% 90.0% 85.0% 80.0% 75.0% 70.0% 65.0% 60.0% 0.70 10.0 V 12.0 V 14.0 V 1.75 3.50 5.25 7.00 Output Current (A) Vo=3.3 V Efficiency Efficiency Curve 90.0% 85.0% 80.0% 75.0% 70.0% 65.0% 60.0% 55.0% 0.70 10.0 V 12.0 V 14.0 V 1.75 3.50 5.25 7.00 Output Current (A) Vo=1.8 V Efficiency Efficiency Curve 85.0% 80.0% 75.0% 70.0% 65.0% 60.0% 55.0% 50.0% 45.0% 0.70 10.0 V 12.0 V 14.0 V 1.75 3.50 5.25 7.00 Output Current (A) Vo=0.9 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 12 Vdc Input 0.9 Vdc - 3.3 Vdc/7 A Output Thermal Derating Curves Vo=0.9 V - 2.5 V Vo=3.3 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 12 Vdc Input 0.9 Vdc - 3.3 Vdc/7 A Output Ripple and Noise Waveforms Ripple and noise at full load 0.9 Vdc output Ripple and noise at full load 1.2 Vdc output Ripple and noise at full load 1.5 Vdc output Ripple and noise at full load 1.8 Vdc output Ripple and noise at full load 2.5 Vdc output Ripple and noise at full load 3.3 Vdc output Note: Ripple and Noise at 12 Vdc input, with a 330 uF/10 V tantalum cap 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 12 Vdc Input 0.9 Vdc - 3.3 Vdc/7 A Output Transient Response Waveforms Transients 50% to 100% load 0.9 Vdc output Transients 100% to 50% load 0.9 Vdc output Transients 50% to 100% load 1.2 Vdc output Transients 100% to 50% load 1.2 Vdc output Transients 50% to 100% load 1.5 Vdc output Transients 100% to 50% load 1.5 Vdc output 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 12 Vdc Input 0.9 Vdc - 3.3 Vdc/7 A Output Transient Response Waveforms (continued) Transients 50% to 100% load 1.8 Vdc output Transients 100% to 50% load 1.8 Vdc output Transients 50% to 100% load 2.5 Vdc output Transients 100% to 50% load 2.5 Vdc output Transients 50% to 100% load 3.3 Vdc output Transients 100% to 50% load 3.3 Vdc output Note: Transient Response at 12 V input, di/dt=0.5 A/uS, with 330 uF/10 V tantalum cap 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 12 Vdc Input 0.9 Vdc - 3.3 Vdc/7 A Output Mechanical Outline SRAH-07A1A0 Pin Connections bel VRAH-07A1A0 Pin 1 2 3 4 5 6 7 Function Remote On/Off (option) Vin Ground Vout Trim (option) N/A N/A Pin Connections bel bel Pin Function 1 Remote On/Off (option) 2 Vin 3 Ground 4 Vout 5 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. 010507 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