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| NON-ISOLATED DC/DC CONVERTERS 12 Vdc Input 0.9 Vdc / 6 A Output VRAF-06AT50 RoHS Compliant PRELIMINARY * * * * * * Non-Isolated High Efficiency Fixed Frequency Low Cost Tracking a Reference for Output Voltage High Power Density * * * * * Under-Voltage Lockout Output Enable OCP/SCP Rev.A Current Source/Sink Capability Over Voltage Protection (Hiccup Mode) Description The Bel VRAF-06AT50 module is a non-isolated, step down dc/dc power converter that operates from a nominal 12 Vdc source. The output is closely regulated and the efficiency is typically 73% at full load (Vin=12 Vdc). Part Selection Output Voltage 0.9 V Input Voltage 12 V Max. Output Current 6A Max. Output Power 5.4 W Typical Efficiency 73% Model Number VRAF-06AT50 Notes: 1. All part numbers above indicate RoHS 6. Change the second letter "R" to "7" for RoHS 5 part numbers. 2. Add "G" suffix at the end of the model numbers listed above to indicate "Tray Packaging". Absolute Maximum Ratings Parameter Input Supply Voltage Input Signal Voltage Operating Temperature Storage Temperature Min -0.5 V -0.3 V 0 C -40 C Typ Max 13.2 V 5.25 V 65 C 85 C Notes Note: All specifications are typical at 25 C unless otherwise stated. Input Specifications Parameter Operating Input Voltage Input Current (full load) Input Current (no load) Reference Voltage Range Remote Off Input Current Input Reflected Ripple Current (pk-pk) Input Reflected Ripple Current (rms) I t Inrush Current Transient Turn on Voltage Threshold Turn off Voltage Threshold 2 Min 10.8 V 1.6 V 2.79 V 2.59 V Typ 12 V 1.8 V 3 mA 50 mA 10 mA 0.006 A s 2 Max 13.2 V 1A 50 mA 1.89 V 10 mA 80 mA 0.012 A s 2.89 V 2.69 V 2 Notes With simulated source impedance of 1000 nH, 5 Hz to 20 MHz. Use a 100 uF/25 V Tan cap with ESR=0.025 ohm max, at 100 kHz@25C. 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 12 Vdc Input 0.9 Vdc / 6 A Output Output Specifications Parameter Output Voltage Set Point Tracking Tolerance (Vddq/2-Vout)/Vout Load Regulation Line Regulation Output Current Output DC Current Limit Output Ripple and Noise (pk-pk) Output Ripple and Noise (rms) Short Circuit Surge Transient Turn on Time Overshoot at Turn on Output Capacitance Transient Response 50% ~ 100% Max Load Settling Time 100% ~ 50% Max Load Settling Time VO =0.9 V 50 mV 50 uS 50 mV 50 uS 80 mV 80 uS 80 mV 80 uS di/dt=0.3 A/uS; Vin12 V; and with a 22 uF / 6.3 V ceramic capacitor at the output. Min -1.5% 0A 0 uF Typ Vddq/2 5 mV 2 mV 20 mV 5 mV 1.1 A s 1 mS 0% 2 Max 1.5% 8 mV 4 mV 6A 11 A 2.2 A s 2 mS 3% 2200 uF 2 Notes Vin=12 V, lout=full load Test conditions: 0-20 MHz BW, with a 22 uF / 6.3 V ceramic capacitor at the output. Note: All specifications are typical at Vin =12 V, Vddq=1.8 V, Io=6 A, Ta= 25C unless otherwise stated. General Specifications Parameter Efficiency Switching Frequency MTBF Dimensions Inches (L x W x H) Millimeters (L x W x H) Weight 0.65 x 0.41 x 0.40 16.51 x 10.41 x 10.16 2.5 g Min 260 kHz Typ 73% 300 kHz TBD Max 340 kHz Calculated Per Bell Core SR-332 (IO = 80% load; Vin=12 V; Ta = 25 C) Notes Vin=12 V, Vddq=1.8 V, Io=6 A Note: All specifications are typical at 25 C unless otherwise stated. Control Specifications Parameter Output Enable ENABLE High ENABLE Low Min 2V 0V Typ Max 5.5 V 0.8 V Notes Enable Pin open, the module is off. 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 / 6 A Output Efficiency Data Efficiency Curve 80.0% Efficiency 70.0% 60.0% 50.0% 40.0% 0.6 1.5 3.0 4.5 6.0 Output Current (A) 10.8 V 12.0 V 13.2 V Thermal Derating Curve 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 / 6 A Output Ripple and Noise Waveform Note: Ripple and noise at Vin=12 V, Vddq=1.8 V, Io=6 A, with a 22 uF/6.3 V X5R ceramic capacitor at the output, Ta=25 C. Transient Response Waveforms 50% to 100% load step at 12 V input, 0.9 V output 100% to 50% load step at 12 V input, 0.9 V output Note: Transient response at di/dt=0.3 A/uS, with 22 uF/6.3 V X5R ceramic capacitor at the output, Ta=25 C. Output Tracking Test condition: Vin=12 V, Vddq=1.8 V, Io=6 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 12 Vdc Input 0.9 Vdc / 6 A Output Mechanical Outline Pin Connections Pin 1 2 3 4 5 Function Vin Vddq Vout (Vtt) GND Enable RoHS Compliance Complies with the European Directive 2002/95/EC, calling for the elimination of lead and other hazardous substances from electronic products. (c)2007 Bel Fuse Inc. Specifications subject to change without notice. 013007 CORPORATE Bel Fuse Inc. 206 Van Vorst Street Jersey City, NJ 07302 Tel 201-432-0463 Fax 201-432-9542 www.belfuse.com FAR EAST 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 EUROPE 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 |
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