NON-ISOLATED DC/DC CONVERTERS 2.4 Vdc - 5.5 Vdc Input VRBC-10F2Ax 0.75 Vdc - 3.63 Vdc/10 A Output RoHS Compliant Rev.A • Non-Isolated • Under-Voltage Lockout (UVLO) • High Efficiency • Wide Input Range • High Power Density • Wide Trim Range • Fixed Frequency (300kHz) • Remote On/Off • OCP/SCP • Remote Sense • Flexible Output Voltage Sequencing • Converter Can Sink and Source Current • Over Temperature Protection • Active Low/High (Option) Description The Bel VRBC-10F2Ax modules are a series of non-isolated dc/dc converters that deliver up to 10 A of output current with full load efficiency of 94% at 3.3 Vdc output. These modules provide precisely regulated voltage programmable via external resistor from 0.75 Vdc to 3.63 Vdc over a wide range of input voltage (2.4 Vdc - 5.5 Vdc). These modules have a sequencing feature that enables designers to implement various types of output voltage sequencing when powering multiple voltages on a board. The open-frame construction and small footprint enable designers to develop cost and space-efficient solutions. Standard features include remote On/Off, remote sense, over current protection, short current protection, wide input, and programmable output voltage. Part Selection Output Voltage 0.75 V - 3.63 V 1 Input Voltage Max. Output Current Max. Output Power Typical Efficiency Model Number Active Low Model Number Active High 2.4 V - 5.5 V 10 A 36.3 W 94% VRBC-10F2AL VRBC-10F2A0 Notes: 1. These modules use a buck topology, so the output voltages must be 0.5 V less than the input voltage. 2. All part numbers above indicate RoHS 6. Change the second letter "R" to "7" for RoHS 5 part numbers. 3. Add “G” to the end of the Model Number to indicate Tray Packaging. Absolute Maximum Ratings Parameter Min Typ Max Input Voltage (continuous) -0.3 V - 5.8 V Output Enable Terminal Voltage -0.3 V - 5.8 V 1 -0.3 V - Vin Ambient Temperature -40 °C - 85 °C Storage Temperature -55 °C - 125 °C Sequencing Voltage Notes Notes: All specifications are typical at 25 °C unless otherwise stated. 1. VRBC-10F2Ax series of modules include a sequencing feature that enables users to implement various types of output voltage sequencing in their applications. This is accomplished via an additional sequencing pin. When the sequencing feature is not used, tie the SEQ pin to Vin or leave the SEQ pin floating. 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 2.4 Vdc - 5.5 Vdc Input 0.75 Vdc - 3.63 Vdc/10 A Output Input Specifications Parameter Input Voltage Input Current (full load) Min 2.4 V Typ - Max 5.5 V Input Current (no load) Remote Off Input Current - 7.0 A 4.04 A 1.89 A 80 mA 15 mA 8.06 A 6.98 A 4.06 A 22 mA Input Reflected Ripple Current (pk-pk) - 120 mA - Input Reflected Ripple Current (rms) - 35 mA - I t Inrush Current Transient - - 0.2 A s Turn-on Voltage Threshold Turn-off Voltage Threshold - 2.2 V 2.0 V - Vo=3.3 V Vo=1.8 V Vo=0.75 V 2 Notes Vo, set ≤ Vin-0.5 V Tested with two 100 uF/10 V tantalum input capacitors (P/N: TPSC107K010R0075 AVX) & simulated source impedance of 1 uH, 5 Hz to 20MHz. 2 Note: All specifications are typical at 25 °C unless otherwise stated. Output Specifications Parameter Output Voltage Set Point Min -2%Vo,set Typ - Max 2%Vo,set Output Voltage Set Point -3%Vo,set - 3%Vo,set - 0.4%Vo,set 0.3%Vo,set - Notes Vin=5 V, lo=lomax full load Over all operating input voltages, resistive loads and temperature conditions Io=Iomin to Iomax Vin=Vinmin to Vinmax Tref=Tamin to Tamax Load Regulation Line Regulation Regulation Over Temperature (-40 °C to +85 °C) Output Current Current Limit Threshold - 0.5%Vo,set - 0A 15 A - 10 A 30 A Short Circuit Surge Transient - - 2A s Ripple and Noise (pk-pk) - 25 mV 50 mV Ripple and Noise (rms) - 8 mV 15 mV Turn on Time Overshoot at Turn on Output Capacitance - 4 mS 0%Vo,set 8 mS 3%Vo,set 0 uF 0 uF - 1000 uF 4700 uF ESR ≥ 1mohm ESR ≥ 10mohm Transient Response 50% ~ 100% Max Load Settling Time 100% ~ 50% Max Load Settling Time 50% ~ 100% Max Load Settling Time 100% ~ 50% Max Load Settling Time All All - 200 mV 25 uS 200 mV 25 uS 120 mV 50 uS 120 mV 50 uS 2 - Tested with 0-20MHz, 10uF/16V tantalum capacitor & 1uF/10V TDK ceramic capacitor at the output di/dt=2.5 A/uS; Vin=5 V; and with 10 uF/16 V tantalum capacitor & 1uF/10V ceramic capacitor at the output di/dt=2.5 A/uS; Vin=5 V; and with two 150 uF/10 V tantalum capacitors & 1 uF/10 V ceramic capacitor at the output Note: All specifications are typical at nominal input (Vin=5 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 2.4 Vdc - 5.5 Vdc Input 0.75 Vdc - 3.63 Vdc/10 A Output General Specifications Parameter Min Typ Max Notes Switching Frequency Over Temperature Shutdown 91% 86% 77% 250 kHz - 94% 89% 80% 300 kHz 125 °C 350 kHz - Output Trim Range (Wide Trim) 0.7525 V - 3.63 V - - 10% Efficiency Vo=3.3 V Vo=1.8 V Vo=0.75 V Remote Sense Compensation MTBF 6,900,000 hours Measured at Vin=5 V, full load (current source) Total adjustment of trim, setpoint and remote sense combined should not exceed 3.63 V. Vo=0.7525 V when trim pin open Calculated Per Bell Core SR-332 (IO = Nominal; Ta = 25°C) Dimensions Inches (L × W × H) Millimeters (L × W × H) Weight - 2.0 x 0.5 x 0.36 50.8 x 12.7 x 9.2 8.3g - Note: All specifications are typical at 25°C unless otherwise stated. Control Specifications Parameter Signal Low (Unit Off) Signal High (Unit On) Signal Low (Unit On) Signal High (Unit Off) Min -0.3 V 1.5 V -0.3 V 1.5 V Typ - Max 0.3 V 5.8 V 0.3 V 5.8 V Sequencing Voltage 0.05 V - Vin - - 2 V/mS 10 mS - - - 100mV 200mV 200mV 400mV Sequencing Slew Rate Capability Sequencing Delay Time Notes VRBC-10F2A0; Remote On/Off pin open, Unit on. VRBC-10F2AL; Remote On/Off pin open, Unit on. Sequencing Voltage applied on SEQ should be higher than output voltage. Delay from Vin, min to application of voltage on SEQ pin Tracking Accuracy Power-Up Power-Down 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 = 21.07 − 5.11 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. Vrim = 0.7 − 0.1698 × (Vadj − 0.7525) Vout 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 2.4 Vdc - 5.5 Vdc Input 0.75 Vdc - 3.63 Vdc/10 A Output Efficiency Data 98.0% 96.0% 94.0% 92.0% 90.0% 4.5V 5.0V 5.5V 88.0% 86.0% 84.0% 82.0% 80.0% 1.0 2.5 5.0 7.5 10.0 Vo=3.3 V 100.0% 95.0% 90.0% 85.0% 3.0V 5.0V 5.5V 80.0% 75.0% 70.0% 1.0 2.5 5.0 7.5 10.0 Vo=1.8 V 95.0% 90.0% 85.0% 80.0% 75.0% 2.4V 5.0V 5.5V 70.0% 65.0% 60.0% 1 3 5 8 10 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 2.4 Vdc - 5.5 Vdc Input 0.75 Vdc - 3.63 Vdc/10 A Output Thermal Derating Curves Vin= 5.0 V, Vo= 3.3 V Vin=5.0 V, Vo=0.75 V Vin= 5.0 V, Vo= 1.8 V Vin=3.3 V, Vo=0.75 V/1.8 V/2.5 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 2.4 Vdc - 5.5 Vdc Input 0.75 Vdc - 3.63 Vdc/10 A Output Ripple and Noise Waveforms Vin=5 V, Vo=0.75 V Vin=5 V, Vo=1.8 V Vin=5 V, Vo=3.3 V Note: Ripple and noise tested at 0-20 MHz BW, 10 uF/16 V tantalum capacitor and 1 uF/10 V ceramic capacitor, full load, 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 2.4 Vdc - 5.5 Vdc Input 0.75 Vdc - 3.63 Vdc/10 A Output Transient Response Waveforms 50% to 100% load step at Vin=5 V, Vo=0.75 V 100% to 50% load step at Vin=5 V, Vo=0.75 V 50% to 100% load step at Vin=5 V, Vo=1.8 V 100% to 50% load step at Vin=5 V, Vo=1.8 V 50% to 100% load step at Vin=5 V, Vo=3.3 V 100% to 50% load step at Vin=5 V, Vo=3.3 V Note: Transient response tested at di/dt=2.5 A/uS, with 10 uF/16 V Tantalum capacitor and 1 uF/10 V ceramic capacitor, 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 2.4 Vdc - 5.5 Vdc Input 0.75 Vdc - 3.63 Vdc/10 A Output Mechanical Outline Pin Connections Pin Function 1 Vout 2 Vout 3 Remote Sense 4 Vout 5 Ground 6 Ground 7 Vin 8 Vin 9 SEQ 10 Trim 11 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. 011707 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