NON-ISOLATED DC/DC CONVERTERS 8.3 Vdc - 14 Vdc Input 0.75 Vdc - 5.0 Vdc/3 A Output VRBA-03A1Ax RoHS Compliant Rev.A • Non-Isolated • Under-Voltage Lockout (UVLO) • Fixed Frequency • OCP/SCP • High Efficiency • Remote On/Off • High Power Density • Wide Trim Range • Active Low/High (Option) • Wide Input Range Description The Bel VRBA-03A1Ax modules are a series of non-isolated dc/dc converters that deliver up to 3 A of output current with full load efficiency of 93% at 5.0 Vdc output. These modules provide precisely regulated voltage programmable via external resistor from 0.75 Vdc to 5.5 Vdc over a wide range of input voltage. Their openframe construction and small footprint enable designers to develop cost and space-efficient solutions. Standard features include remote On/Off, programmable output voltage, over-temperature protection, over current protection, short circuit protection, and under-voltage lockout. Part Selection Output Voltage Input Voltage Max. Output Current Max. Output Power Typical Efficiency at 5.0V Model Number Active High Model Number Active Low 0.75 V - 5.0 V 8.3 V - 14 V 3A 15 W 93% VRBA-03A1A0 VRBA-03A1AL Notes: 1. Add “G” suffix at the end of the model number to indicate 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 -0.3 V - 15 V Output Enable Terminal Voltage -0.3 V - 15 V Ambient Temperature -40 °C - 85 °C Storage Temperature -55 °C - 125 °C Notes Note: All specifications are typical at 25 °C unless otherwise stated. Input Specifications Parameter Input Voltage Input Current (full load) Min 8.3 V Typ 12 V Max 14 V Vo=5.0 V Vo=3.3 V Vo=0.75 V - 1.35 A 0.90 A 0.24 A 2.00 A 1.37 A 0.37 A Vo=5.0 V Vo=3.3 V Vo=0.75 V - 55 mA 40 mA 15 mA 65 mA 50 mA 20 mA Notes Input Current (no load) 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 8.3 Vdc - 14 Vdc Input 0.75 Vdc - 5.0 Vdc/3 A Output Input Specifications (continued) Parameter Remote Off Input Current Input Reflected Ripple Current (pk-pk) Vo=5.0 V Vo=3.3 V Vo=0.75 V Input Reflected Ripple Current (rms) Vo=5.0 V Vo=3.3 V Vo=0.75 V 2 I t Inrush Current Transient Min - Typ 3 mA Max 6 mA Notes - 70 mA 60 mA 25 mA 100 mA 90 mA 40 mA - 20 mA 15 mA 6 mA 2 0.01 A s 60 mA 30 mA 15 mA 2 0.02 A s Turn-on Voltage Threshold 7.6 V 7.9 V 8.2 V Turn-off Voltage Threshold 7.0 V 7.8 V 8.1 V Tested with two 100 uF/25 V tantalum input capacitors & simulated source impedance of 1uH, 5 Hz to 20 MHz. Output Specifications Parameter Output Voltage Set Point Min -2%Vo,set Typ - Max 2%Vo,set Output Voltage Set Point -2.5%Vo,set - 3.5%Vo,set Load Regulation 0.5%Vo,set 0.4%Vo,set 0.5%Vo,set Notes Vin=12 V, lo=lomax, full load Over all operating input voltages, resistive loads and temperature conditions Io=Iomin to Iomax Line Regulation Regulation Over Temperature (-40 °C to +85 °C) Output Current 0.4%Vo,set 0.3%Vo,set 0.4%Vo,set Vin=Vinmin to Vinmax - 0.5%Vo,set 0.8%Vo,set 0A - 3A Current Limit Threshold Short Circuit Surge Transient 4.2 A - 11 A 2 - 0.1 A s - Vo=5.0 V Vo=3.3 V Vo=0.75 V - 80 mV 55 mV 25 mV 120 mV 80 mV 45 mV Vo=5.0 V Vo=3.3 V Vo=0.75 V Turn on Time - 25 mV 15 mV 5 mV 5 mS 45 mV 25 mV 10 mV 8 mS Overshoot at Turn on - 0% 3% 0 uF - 1200 uF Ripple and Noise (pk-pk) Ripple and Noise (rms) Output Capacitance Tested with 0-20 MHz, with 10 uF/10 V tantalum capacitor and 1uF/10 V ceramic capacitor at the output Transient Response 50% ~ 100% Max Load Settling Time 100% ~ 50% Max Load Settling Time All - 200 mV 300 mV - 50 uS 80 uS - 200 mV 300 mV - 50 uS 80 uS di/dt=2.5 A/uS; Vin=12 V; and with 10 uF/10 V tantalum capacitor and 1uF/10 V ceramic capacitor at the output Note: All specifications are typical at nominal input (Vin=12 V), 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 8.3 Vdc - 14 Vdc Input 0.75 Vdc - 5.0 Vdc/3 A Output General Specifications Parameter Min Typ Max Notes 89% 86% 73% - 93% 90% 77% 300 kHz - Measured at Vin=12 V, full load (Current Source) - 135 °C - Efficiency Vo=5.0 V Vo=3.3 V Vo=0.75 V Switching Frequency Over Temperature Shutdown MTBF Calculated Per Bell Core SR-332 (IO = 80% load; Ta = 25 °C) 8,791,825 hours Dimensions (Vertical Mount) Inches (L × W × H) Millimeters (L × W × H) Weight - 0.9 x 0.4 x 0.243 22.9 x 10.2 x 6.16 2.5 g - Note: All specifications are typical at 25 °C unless otherwise stated. Control Specifications Parameter Remote On/Off Min Signal Low (Unit Off) Signal High (Unit On) Signal Low (Unit On) Signal High (Unit Off) Output Voltage Trim Range (Wide Trim) Typ Max -0.3 V - 0.4 V 2.5 V - 14 V -0.3 V - 0.4 V 2.5 V - 14 V 0.7525 V - 5.0 V Notes VRBA-03A1A0; Remote On/Off pin open, Unit on. VRBA-03A1AL; Remote On/Off pin open, Unit on. Output Trim Equations Equation for calculating the trim resistor (in kΩ) given the desired adjusted voltage (Vadj) is shown below. The Trim Up resistor should be connected between the Trim pin and Ground. Vout Rtrim 10.507 = −1 Vadj − 0.7525 Module Trim Rtrim GND Equation for calculating the trim voltage (in V) given the desired adjusted voltage (Vadj) is shown below. The Trim Up voltage should be connected between the Trim pin and Ground. Vout Vtrim = 0.7 − 0.0667 × (Vadj − 0.7525) Module Trim Vtrim GND 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 8.3 Vdc - 14 Vdc Input 0.75 Vdc - 5.0 Vdc/3 A Output Efficiency Data MODULE 5.0V EFFICIENCY 100.0% 95.0% 90.0% 85.0% 80.0% 75.0% 70.0% 65.0% 60.0% 0.30A 8.3V 12.0V 14.0V 0.75A 1.50A 2.25A OUTPUT CURRENT 3.00A EFFICIENCY MODULE 3.3V 95.0% 90.0% 85.0% 80.0% 75.0% 70.0% 65.0% 60.0% 0.30A 8.3V 12.0V 14.0V 0.75A 1.50A 2.25A OUTPUT CURRENT 3.00A MODULE 0.75V EFFICIENCY 85.0% 75.0% 65.0% 8.3V 12.0V 14.0V 55.0% 45.0% 0.30A 1.75A 1.50A 2.25A OUTPUT CURRENT 3.00A 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 8.3 Vdc - 14 Vdc Input 0.75 Vdc - 5.0 Vdc/3 A Output Thermal Derating Curves Vin=12 V, Vo=5.0 V Vin=12 V, Vo=3.3 V Vin=12 V, Vo=0.75 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 8.3 Vdc - 14 Vdc Input 0.75 Vdc - 5.0 Vdc/3 A Output Ripple and Noise Waveforms 12 Vdc input, 0.75 Vdc output 12 Vdc input, 3.3 Vdc output 12 Vdc input, 5.0 Vdc output Note: Ripple and noise at full load, 0-20 MHz BW, with 10 uF/10 V tantalum cap and 1 uF/10 V ceramic 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 8.3 Vdc - 14 Vdc Input 0.75 Vdc - 5.0 Vdc/3 A Output Transient Response Waveforms Transients 50% to 100% load 0.75 Vdc output Transients 100% to 50% load 0.75 Vdc output Transients 50% to 100% load 3.3 Vdc output Transients 100% to 50% load 3.3 Vdc output Transients 50% to 100% load 5.0 Vdc output Transients 100% to 50% load 5.0 Vdc output Note: Transient response at 12 Vdc input, di/dt=2.5 A/uS, with 10 uF/10 V tantalum cap and 1 uF/10 V ceramic 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 8.3 Vdc - 14 Vdc Input 0.75 Vdc - 5.0 Vdc/3 A Output Mechanical Outline Pin Connections Pin Function 1 Vout 2 Trim 3 Ground 4 Vin 5 Remote On/Off RoHS Compliance Complies with the European Directive 2002/95/EC, calling for the elimination of lead and other hazardous substances from electronic products. ©2007 Bel Fuse Inc. Specifications subject to change without notice. 011507 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