NON-ISOLATED DC/DC CONVERTERS 2.4 V-5.5 V Input 0.75 V-3.63 V/16 A Output SRBC-16F2Ax Series RoHS Compliant • Non-Isolated • Under-voltage Lockout (UVLO) • High Efficiency • Over Temperature Protection • High Power Density • Wide Input Range • Fixed Frequency (300 kHz) • Wide Trim Range • OCP/SCP • Remote Sense • Flexible Output Voltage Sequencing • Converter can sink and source current • Remote On/Off • Active Low/High (option) Description The Bel SRBC-16F2Ax modules are a series of non-isolated dc/dc converters that 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 0.75 V to 3.63 V over a wide range of input voltage (2.4-5.5 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. 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 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% SRBC-16F2AL SRBC-16F2A0 SRBC-16F2AW 2 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. SRBC-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 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) - 11.23 A 8.70 A 6.40 A 5.45 A 4.52 A 3.05 A 80 mA 15.10 A 14.81 A 13.64 A 11.76 A 9.64 A 6.69 A - Remote Off Input Current - 10 mA 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 - 2.2 V - Turn-off Voltage Threshold - 2.0 V - Vo=3.3V Vo=2.5V Vo=1.8V Vo=1.5V Vo=1.2V Vo=0.75V 2 2 Notes Vo, set ≤ Vin-0.8 V Tested with two 100uF/10V 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 Notes Vin=5 V, lo=lomax full load Output Voltage Set Point -3% Vo,set - 3% Vo,set Over all operating input voltages, resistive loads and temperature conditions Load Regulation - 0.4% Vo,set - Io=Io, min to Io, max Line Regulation Regulation Over Temperature (-40 °C to +85 °C) Output Current - 0.3% Vo,set - Vin=Vin, min to Vin, max - 0.5% Vo,set - Tref=Ta, min to Ta, max 0A - 16 A Current Limit Threshold 19 A - Short Circuit Surge Transient - 1.6A s 2A s Ripple and Noise (pk-pk) - 25 mV 50 mV Ripple and Noise (rms) - 8 mV 15 mV Turn on Time - 4 mS 8 mS Overshoot at Turn on Output Capacitance - 0% Vo,set 3% Vo,set 0 uF 0 uF - 1000 uF 5000 uF ESR ≥ 1 mohm ESR ≥ 10 mohm 35 A 2 2 Tested with 0-20 MHz, 10 uF / 16 V tantalum capacitor & 1 uF /10 V TDK ceramic 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 2.4 V-5.5 V Input 0.75 V-3.63 V/16 A Output Output Specifications (continued) Parameter Min Typ Max Notes 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 300 mV 50 uS 300 mV 50 uS 150 mV 100 uS 150 mV 100 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 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. General Specifications Parameter Min Typ Max 92% 90% 88% 85% 82% 76% 250 kHz 0.7525 V - 94% 92% 90% 88% 85% 79% 300 kHz 125 °C - 350 kHz 3.63 V 5% Efficiency Vo=3.3 V Vo=2.5 V Vo=1.8 V Vo=1.5 V Vo=1.2 V Vo=0.75 V Switching Frequency Over Temperature Shutdown Output Trim Range (Wide Trim) Remote Sense Compensation MTBF Notes Measured at Vin=5 V, full load Calculated Per Bell Core SR-332 (IO = Nominal; Ta = 25 °C) 5,438,000 hours Dimensions Inches (L × W × H) Millimeters (L × W × H) Weight - 1.30 x 0.53 x 0.315 33.02 x 13.46 x 8.00 6.6 g - Note: All specifications are typical at 25 °C unless otherwise stated. Control Specifications Parameter Remote On/Off Signal Low (Unit Off) Signal High (Unit On) Signal Low (Unit On) Signal High (Unit Off) Min Typ Max Notes -0.3 V 1.5 V -0.3 V 1.5 V - 0.3 V 5.8 V 0.3 V 5.8 V SRBC-16F2A0; Remote On/Off pin open, Unit on. Sequencing Voltage 0.05V - Vin - - 2 V/mS 10 mS - - - 100 mV 200 mV 200 mV 400 mV Sequencing Slew Rate Capability Sequencing Delay Time SRBC-16F2AL & SRBC-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 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 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. Vout Vtrim = 0.7 − 0.1698 × (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 2.4 V-5.5 V Input 0.75 V-3.63 V/16 A Output Efficiency Data 98.0% 100.0% 96.0% 95.0% 94.0% 92.0% 90.0% 3.0V 85.0% 3.3V 5V 4.5V 90.0% 5V 88.0% 5.5V 5.5V 80.0% 86.0% 84.0% 75.0% 82.0% 70.0% 80.0% 1 2 3 4 5 6 7 8 9 10 11 12 13 14 1 15 16 2 3 4 5 6 7 Vo=3.3 V 8 9 10 11 12 13 14 15 16 Vo=2.5 V 95.0% 95.0% 90.0% 90.0% 85.0% 85.0% 80.0% 3V 3.3 75.0% 5V 5.5V 3V 80.0% 3.3V 5V 5.5V 75.0% 70.0% 70.0% 65.0% 65.0% 60.0% 60.0% 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 1 16 2 3 4 5 6 7 8 Vo=1.8 V 9 10 11 12 13 14 15 16 Vo=1.5 V 95.0% 90.0% 90.0% 85.0% 85.0% 80.0% 80.0% 75.0% 70.0% 65.0% 3V 75.0% 3.3V 5V 5.5 70.0% 3V 3.3V 5V 5.5V 65.0% 60.0% 60.0% 55.0% 55.0% 50.0% 45.0% 50.0% 1 2 3 4 5 6 7 8 9 Vo=1.2 V 10 11 12 13 14 15 16 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 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 Thermal Derating Curves Vin=5.0 V, Vo=2.5 V or 3.3 V Vin=5.0 V, Vo=1.5 V or 1.8 V Vin=5.0 V, Vo=0.7525 V or 1.2 V Vin=3.3 V, Vo=1.5 V or 1.8 V Vin=3.3 V, Vo=0.7525 V or 1.2 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 BOTTOM VIEW Pin Function 1 Remote On/Off 2 Vin 3 SEQ 4 Ground 5 Vout 6 Trim 7 Remote Sense PAD SIZE: MIN: 0.14"* 0.095" (3.56mm * 2.41mm) MAX: 0.165"* 0.11" (4.19mm * 2.79mm) RoHS Compliance Complies with the European Directive 2002/95/EC, calling for the elimination of lead and other hazardous substances from electronic products. ©2005 Bel Fuse Inc. Specifications subject to change without notice. 120905 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