NON-ISOLATED DC/DC CONVERTERS 3.3 Vdc Input 0.9 Vdc - 2.5 Vdc/7 A Output xRAH-07C1A0 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 • UL60950-1 Recognized (UL/cUL) • Low Cost Description The Bel xRAH-07C1A0 module is a series of non-isolated, step down dc/dc power converters that operate from a nominal 3.3 Vdc source. These converters are available in a range of output voltages from 0.9 Vdc to 2.5 Vdc (default output voltage is 1.8 Vdc). It is packaged in a compact, overmolder 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 92% at full load. Part Selection Output Voltage 0.9 Vdc - 2.5 Vdc Input Voltage 3.3 Vdc Max. Output Current 7A Max. Output Power 17.5 W Typical Efficiency 92% Part Number Surface Mount SRAH-07C1A0 Part Number Vertical Mount VRAH-07C1A0 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 -40 °C Typ - Max 6V 6V 85 °C 125 °C Notes Input Specifications Parameter Input Voltage Input Current (no load) Input Current (full load) Min 3V - Typ - Max 3.6 V 110 mA Remote Off Input Current - 7 mA 6.6 A 5.3 A 4.6 A 3.8 A 3.2 A 3.0 A 15 mA Input Reflected Ripple Current (pk-pk) - 150 mA 250 mA Input Reflected Ripple Current (rms) - 50 mA 80 mA VO=2.5 V VO=1.8 V VO=1.5 V VO=1.2 V VO=1.0 V VO=0.9 V 2 I t Inrush Current Transient Turn on Voltage Threshold Turn off Voltage Threshold 2.5 V - 2 0.08 A s 2.4 V Notes With simulated source impedance of 500 nH, 5 Hz to 20 MHz and a 270 uF/16 V with ESR=0.03 ohm max. at 100 kHz 2 0.16 A s 2.8 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 Vdc Input 0.9 Vdc - 2.5 Vdc/7 A Output Output Specifications Parameter Output Voltage Set Point Min Typ Max 2.450 V 1.764 V 1.470 V 1.176 V 0.980 V 0.882 V 2.5 V 1.8 V 1.5 V 1.2 V 1.0 V 0.9 V 2.550 V 1.836 V 1.530 V 1.224 V 1.020 V 0.918 V VO=1.5 V-2.5 V VO=0.9 V-1.2 V - ±3 mV ±1 mV ±10 mV ±5 mV VO=1.5 V-2.5 V VO=0.9 V-1.2 V - ±3 mV ±1 mV ±10 mV ±5 mV VO=2.5 V VO=1.8 V VO=1.5 V VO=1.2 V VO=1.0 V VO=0.9 V 0A ±25 mV ±15 mV ±15 mV ±10 mV ±8 mV ±8 mV - ±40 mV ±30 mV ±30 mV ±20 mV ±15 mV ±15 mV 7A 8.4 A - 17.5 A VO=2.5 V VO=1.8 V VO=1.5 V VO=1.2 V VO=1.0 V VO=0.9 V Line Regulation Load Regulation Regulation Over Temperature (-40 °C to +85 °C) Output Current Current Limit Threshold Short Circuit Surge Transient 2 Notes 2 - 0.08 A s 0.12 A s VO=2.5 V-0.9 V - 10 mV 20 mV VO=2.5 V-1.2 V VO=1.0 V-0.9 V - 40 mV 40 mV 80 mV 70 mV - 7 mS 15 mS Overshoot at Turn on - 0% 1% Output Capacitance Transient Response 0 uF - 2200 uF Ripple and Noise (rms) Ripple and Noise (pk-pk) Turn on Time 50% ~ 100% Max Load Overshoot - 120 mV 180 mV Settling Time - 40 uS 80 uS 100% ~ 50% Max Load - 120 mV 180 mV Settling Time - 40 uS 80 uS 50% ~ 100% Max Load Overshoot - 100 mV 150 mV Settling Time - 40 uS 80 uS - 100 mV 150 mV 100% ~ 50% Max Load 50% ~ 100% Max Load 100% ~ 50% Max Load Overshoot Overshoot Vo=1.8 V2.5 V Vo=1.5 V Settling Time - 40 uS 80 uS Overshoot - 50 mV 100 mV Settling Time Overshoot Settling Time Vo=0.9 V1.2 V Test conditions: Vin=3.3 V, Io= full load - 40 uS 80 uS - 50 mV 100 mV - 40 uS 80 uS Test condition: 0-20 MHz BW, with a 1 uF ceramic capacitor and 10 uF aluminum capacitor at the output. Test conditions: di/dt = 0.5 A/uS; Vin = 3.3 V; without any external 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 3.3 Vdc Input 0.9 Vdc - 2.5 Vdc/7 A Output General Specifications Parameter Min Typ Max Notes 90% 86% 84% 81% 79% 78% 250 kHz 92% 88% 86% 83% 81% 80% 300 kHz 340 kHz 50% - 146% Efficiency VO=2.5 V VO=1.8 V VO=1.5 V VO=1.2 V VO=1.0 V VO=0.9 V Switching Frequency Output Trim Range 3,391,747 hours MTBF Dimensions (surface mount) Inches (L × W × H) Millimeters (L × W × H) Dimensions (vertical) Inches (L × W × H) Millimeters (L × W × H) Weight Measured at Vin=3.3 V, full load and Ta=25 °C VO=1.8 V Calculated Per Bell Core SR-332 (Vin=3.3 V; Vo=1.8 V; IO = 5.6 A; 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 Remote On/Off Min Typ Max Signal Low (Unit Off) -0.3 V - 1V Signal High (Unit On) 1.8 V - 3.6 V Notes Remote on/off pin open, unit on. Output Trim Equations Equations for calculating the trim resistor given the desired adjusted voltage (Vadj) and the nominal output voltage of the converter (Vnom) are shown below. The Trimup resistor should be connected between the Trim pin and Ground and the Trimdown resistor should be connected between the Trim pin and Vout pin. 3.064 Rtrim _ up = ( − 0.261) K ohm Vo, adj − Vo Vout Module Trim Rtrimup GND 3.8488 Rtrim _ down = ( − 4.091)Kohm Vo − Vo, adj Vout Rtrimdown Module Trim GND Note: Output voltage Vo=1.8 V when Rtrim is open. 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 Vdc Input 0.9 Vdc - 2.5 Vdc/7 A Output Efficiency Data MODULE 1.8V MODULE 2.5V 100.0% 90.0% 3 3.3 3.6 80.0% 70.0% EFFICIENCY EFFICIENCY 100.0% 60.0% 3 3.3 3.6 80.0% 70.0% 60.0% 0.7 1.8 3.5 5.3 7.0 0.7 1.8 3.5 5.3 OUTPUT CURRENT OUTPUT CURRENT MODULE 1.5V MODULE 1.2V 7.0 90.0% 85.0% 3 3.3 3.6 75.0% 65.0% EFFICIENCY 95.0% EFFICIENCY 90.0% 80.0% 3 3.3 3.6 70.0% 60.0% 50.0% 55.0% 0.7 0.7 1.8 3.5 5.3 7.0 1.8 OUTPUT CURRENT MODULE 1.0V 5.3 7.0 MODULE 0.9V 90.0% 95.0% 80.0% 3 3.3 3.6 70.0% 60.0% EFFICIENCY EFFICIENCY 3.5 OUTPUT CURRENT 85.0% 3 3.3 3.6 75.0% 65.0% 55.0% 50.0% 0.7 1.8 3.5 5.3 OUTPUT CURRENT 7.0 0.7 1.8 3.5 5.3 7.0 OUTPUT 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 3.3 Vdc Input 0.9 Vdc - 2.5 Vdc/7 A Output Thermal Derating Curves VRAH-07C1A0 SRAH-07C1A0 Ripple and Noise Waveforms Note: Ripple and noise at full load, 3.3 Vdc input, 1.8 Vdc output and Ta=25 deg C, with 1 uF ceramic capacitor and 10 uF aluminum capacitor at the 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 3.3 Vdc Input 0.9 Vdc - 2.5 Vdc/7 A Output Transient Response Waveforms 50% to 100% load Transient at Vin=3.3 V, Vo=1.8 V 100% to 50% load Transient at Vin=3.3 V, Vo=1.8 V Note: Transient Response at di/dt=0.5 A/uS, external load capacitance Co=0uF (electrolytic), 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 3.3 Vdc Input 0.9 Vdc - 2.5 Vdc/7 A Output Mechanical Outline SRAH-07C1A0 Pin Connections bel VRAH-07C1A0 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