NON-ISOLATED DC/DC CONVERTERS 2.4 V-5.5 V Input 0.75 V-3.63 V/16 A Output VRBC-16F2Ax Series RoHS Compliant • Non-Isolated • Under-voltage Lockout (UVLO) • High Efficiency • Over Temperature Protection • High Power Density • Remote Sense • OCP/SCP • Wide Input • Fixed Frequency (300 kHz) • Wide Trim • Flexible Output Voltage Sequencing • Converter can sink and source Current • Remote On/Off • Active Low/High (option) Description The Bel VRBC-16F2Ax modules are a series of non-isolated dc/dc converters that can deliver up to 16 A of output current with full load efficiency of 94% at 3.3 V output. These modules provide precisely regulated voltage programmable via external resistor from 0.75Vdc to 3.63Vdc over a wide range of input voltage (2.4 V5.5 V). These modules have a sequencing feature that enables designers to implement various types of output voltage sequencing when powering multiple voltages on a board. Their open-frame construction and small footprint enable designers to develop cost and space-efficient solutions. Standard features include remote ON/OFF, programmable output voltage and over current protection. Part Selection Output Voltage 1 0.75 V-3.63 V Input Voltage Max. Output Current Max. Output Power Typical Efficiency Model Number Active Low Model Number Active High Model Number Active Low 2.4 V-5.5 V 16 A 58.1 W 94% VRBC-16F2AL VRBC-16F2A0 VRBC-16F2AW Notes: 1. These modules use a buck topology, so the output voltages must be 0.8 V less than the input voltage. 2. “W” indicates special coating. 3. Add “G” to the end of the Model Number to indicate Tray Packaging. Absolute Maximum Ratings Min Typ Max Input Voltage (continuous) Parameter -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-16F2Ax 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. Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 • Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com 2 NON-ISOLATED DC/DC CONVERTERS 2.4 V-5.5 V Input 0.75 V-3.63 V/16 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 - 11.23 A 6.47 A 3.08 A 80 mA 10 mA 12.89 A 13.55 A 6.67 A 22 mA Input Reflected Ripple Current (pk-pk) - 100 mA - Input Reflected Ripple Current (rms) - 40 mA - I t Inrush Current Transient - 0.15 A s 0.3 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 2 Notes Vo, set ≤ Vin-0.8 V Tested with two 100 uF/10 V tantalum input capacitors (P/N: TPSC107K010R0075 AVX) & simulated source impedance of 1 uH, 5 Hz to 20 MHz. 2 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=Io, min to Io, max Vin=Vin, min to Vin, max Tref=Ta, min to Ta, max Load Regulation Line Regulation Regulation Over Temperature (-40 C to +85 °C) Output Current Current Limit Threshold - 0.5%Vo,set - 0A 19 A - 16 A 35 A Short Circuit Surge Transient - 1.6 A2s 2 A2s 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 5000 uF ESR ≥ 1mohm ESR ≥ 10mohm Transient Response 1 50% ~ 100% Max Load Settling Time 100% ~ 50% Max Load Settling Time 2 Transient Response 50% ~ 100% Max Load Settling Time 100% ~ 50% Max Load Settling Time Tested with 0-20 MHz, 10 uF/16 V tantalum capacitor & 1 uF/10 V TDK ceramic capacitor at output VO=0.75 V 3.3 V - 300 mV 50 uS 300 mV 50 uS - di/dt=2.5 A/ uS; Vin=5 V; and with 10 uF/16 V tantalum capacitor & 1 uF/10 V ceramic capacitor at output VO=0.75 V 3.3 V - 150 mV 100 uS 150 mV 100 uS - 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 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 V-5.5 V Input 0.75 V-3.63 V/16 A Output General Specifications Parameter Min Typ Max 91% 86% 75% 94% 89% 78% - 250 kHz 0.7525 V - 300 kHz 125 °C - 350 kHz 3.63 V 5% Notes Efficiency Vo=3.3 V Vo=1.8 V Vo=0.75 V Switching Frequency Over Temperature Shutdown Output Trim Range (Wide Trim) Remote Sense Compensation MTBF Measured at Vin=5 V, full load Calculated Per Bell Core SR-332 (IO = Nominal; Ta = 25 °C) 5,109,613 hours Dimensions Inches (L × W × H) Millimeters (L × W × H) Weight 2.0 x 0.5 x 0.363 50.80 x 12.7 x 9.23 8.3 g - - 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 - - - 100 mV 200 mV 200 mV 400 mV Sequencing Slew Rate Capability Sequencing Delay Time Notes VRBC-16F2A0; Remote On/Off pin open, Unit on. VRBC-16F2AL & VRBC-16F2AW; Remote On/Off pin open, Unit on. Sequencing Voltage 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. Vtrim = 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 V-5.5 V Input 0.75 V-3.63 V/16 A Output Efficiency Data 98.0% 96.0% 94.0% 92.0% 90.0% 88.0% 86.0% 4.5V 84.0% 5.0V 82.0% 5.5V 80.0% 1.6 4.0 8.0 12.0 16.0 Vo=3.3 V 100.0% 95.0% 90.0% 85.0% 80.0% 3.0V 5.0V 75.0% 5.5V 70.0% 1.6 4.0 8.0 12.0 16.0 Vo=1.8 V 95.0% 90.0% 85.0% 80.0% 75.0% 70.0% 2.4V 65.0% 5.0V 5.5V 60.0% 1.6 4.0 8.0 12.0 16.0 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 V-5.5 V Input 0.75 V-3.63 V/16 A Output Thermal Derating Curves Vo=3.3 V Vo=1.8 V Vo=0.7525 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 V-5.5 V Input 0.75 V-3.63 V/16 A Output Mechanical Outline Pin Connections Pin Function 1 Vout 2 Vout 3 Vo,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. ©2006 Bel Fuse Inc. Specifications subject to change without notice. 011906 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