NON-ISOLATED DC/DC CONVERTERS 2.4 Vdc - 5.5 Vdc Input SRBC-10F1Ax • 0.75 Vdc - 3.63 Vdc/10 A Output RoHS Compliant Non-Isolated Rev.A • Under-voltage Lockout (UVLO) • High Efficiency • Over Temperature Protection • High Power Density • OCP/SCP • Fixed Frequency (300 kHz) • Wide Input • Remote On/Off • Wide Trim • Converter Can Sink and Source Current • Remote Sense • Active Low/High (Option) Description The Bel SRBC-10F1Ax modules are a series of non-isolated dc/dc converters that deliver up to 10 A of output current with full load efficiency of 95% 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. The openframe construction and small footprint enable designers to develop cost and space-efficient solutions. Standard features include remote On/Off, 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 2.4 V - 5.5 V 10 A 36 W 95% SRBC-10F1AL SRBC-10F1A0 Notes: 1. These modules use a buck topology, so the output voltages must be 0.5 V less than the input voltage. 2. Add “G” to the end of the Model Number to indicate Tray Packaging. 3. All part numbers above indicate RoHS 6. Change the second letter "R" to "7" for RoHS 5 part numbers. 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 Ambient Temperature -40 °C - 85 °C Storage Temperature -55 °C - 125 °C Notes 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 2.4 Vdc - 5.5 Vdc Input 0.75 Vdc - 3.63 Vdc/10 A Output Input Specifications Parameter Min 2.4 V Typ - Max 5.5 V Input Current (no load) - 7.0 A 5.5 A 4.0 A 3.5 A 3.0 A 2.0 A 80 mA 8.0 A 9.5 A 9.0 A 7.5 A 6.0 A 4.0 A - Remote Off Input Current - 15 mA - Input Reflected Ripple Current (pk-pk) - 140 mA - Input Reflected Ripple Current (rms) - 40 mA - I t Inrush Current Transient - - 0.2 A s Turn-on Voltage Threshold - 2.2 V - Turn-off Voltage Threshold - 2.0 V - Input Voltage Input Current (full load) Vo=3.3 V Vo=2.5 V Vo=1.8 V Vo=1.5 V Vo=1.2 V Vo=0.75 V 2 Notes Vo, set ≤ Vin-0.5 V With simulated source impedance of 1 uH, 5 Hz to 20 MHz and two 100 uF /10 V external input Tantalum capacitors at the input. 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 Notes Vin=5 V, lo=lo max Output Voltage Set Point -3% Vo,set - 3% Vo,set Over all operating input voltage, resistive load, and temperature conditions Load Regulation - 0.4% Vo,set - lo=lomin to lomax Line Regulation Regulation Over Temperature (-40 °C to +85 °C) Output Current - 0.3% Vo,set - Vin=Vinmin to Vinmax - 0.5% Vo,set - 0A - 10 A Current Limit Threshold 15 A - 27 A Short Circuit Surge Transient - - 1.5 A 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% 3% 0 uF 0 uF - 1000 uF 4700 uF ESR ≥1 mohm ESR ≥10 mohm 2 Tested with 0-20MHz, with external 10uF/16V tantalum capacitor & 1uF/10V TDK ceramic capacitor 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 Output Specifications (continued) Parameter 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 50% ~ 100% Max Load Settling Time 100% ~ 50% Max Load Settling Time 50% ~ 100% Max Load Settling Time 100% ~ 50% Max Load Settling Time 50% ~ 100% Max Load Settling Time 100% ~ 50% Max Load Settling Time 50% ~ 100% Max Load Settling Time 100% ~ 50% Max Load Settling Time VO = 3.3 V VO = 2.5 V VO = 1.8 V VO = 1.5 V VO =1.2 V VO = 0.75 V Min Typ Max - 130 mV 50 uS 150 mV 50 uS 130 mV 50 uS 130 mV 50 uS 120 mV 50 uS 120 mV 50 uS 120 mV 50 uS 120 mV 50 uS 130 mV 50 uS 130 mV 50 uS 120 mV 50 uS 140 mV 50 uS - Notes di/dt=2.5 A/uS; Vin=5 V; and with external 2 × 150 uF/16 V Tantalum capacitors and 1 uF /10 V ceramic capacitor at the output Note: All specifications are typical at nominal input, full load at 25 °C unless otherwise stated. General Specifications Parameter Min Typ Max Switching Frequency Over Temperature Shutdown 92% 90% 88% 87% 85% 79% 250 kHz - 95% 93% 91% 90% 88% 82% 300 kHz 125 °C 350 kHz - Output Voltage Trim Range 0.7525 V - 3.63 V - 10% - Notes 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 Remote Sense Compensation MTBF 6,643,156 hours Measured at Vin=5 V, full load 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 = 80% Io, max; Vo=1.8 V; Vin=5.0 V; Ta = 25 °C) Dimensions Inches (L × W × H) Millimeters (L × W × H) Weight 1.3 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. 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 Control Specifications Parameter Min Typ Max Notes Signal Low (Unit Off) -0.3 V - 0.3 V Signal High (Unit On) 1.5 V - 5.8 V SRBC-10F1A0; Remote On/Off pin open, Unit on. Signal Low (Unit On) -0.3 V - 0.3 V Signal High (Unit Off) 1.5 V - 5.8 V Remote On/Off SRBC-10F1AL; Remote On/Off pin open, Unit on. Remote Enable Specifications The SRBC-10F1AL modules feature an enable pin with negative logic. If not using the enable pin, leave the pin open (the module will be on). During logic_high, the module is turned off, during logic_low, the module is turned on. It inner circuit impedance is showed as figure. SRBC-10F1AL The SRBC-10F1A0 modules feature an enable pin with Positive logic. If not using the enable pin, leave the pin open (the module will be on). During logic_high, the module is turned on, during logic_low, the module is turned off. It inner circuit impedance is showed as figure. SRBC-10F1A0 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 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 Vdc - 5.5 Vdc Input 0.75 Vdc - 3.63 Vdc/10 A Output Efficiency Data 2.5V Vout 3.3V Vout 97.0% 95.0% 93.0% Efficiency Efficiency 95.0% 91.0% 4.5V 5.0V 5.5V 89.0% 87.0% 90.0% 85.0% 3.0V 3.3V 5.0V 5.5V 80.0% 85.0% 1.0 2.0 3.0 4.0 5.0 6.0 7.0 8.0 9.0 75.0% 10.0 Output Current (A) 1.0 2.0 3.0 4.0 5.0 6.0 Output Current (A) 1.8V Vout 1.5V Vout 7.0 8.0 9.0 10.0 95.0% 95.0% 85.0% 3.0V 3.3V 5.0V 5.5V 80.0% Efficiency Efficiency 90.0% 90.0% 85.0% 80.0% 3.0V 3.3V 5.0V 5.5V 75.0% 75.0% 70.0% 1.0 2.0 3.0 4.0 5.0 6.0 Output Current (A) 7.0 8.0 9.0 10.0 1.0 2.0 3.0 4.0 7.0 8.0 9.0 90.0% 90.0% 85.0% 85.0% 80.0% 80.0% 75.0% 3.0V 3.3V 5.0V 5.5V 70.0% 65.0% 60.0% Efficiency 95.0% 75.0% 70.0% 3.0V 3.3V 5.0V 5.5V 65.0% 60.0% 55.0% 1.0 2.0 3.0 4.0 5.0 6.0 Output Current (A) 10.0 0.75V Vout 1.2V Vout Efficiency 5.0 6.0 Output Current (A) 7.0 8.0 9.0 10.0 1.0 2.0 3.0 4.0 5.0 6.0 Output Current (A) 7.0 8.0 Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 • Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com 9.0 10.0 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=0.75 V Vin=5.0 V, Vo=1.5 V Vin=5.0 V, Vo=2.5 V Vin=5.0 V, Vo=3.3 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 (continued) Vin=3.3 V, Vo=0.75 V Vin=3.3 V, Vo=1.5 V Vin=3.3 V, Vo=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=5.0 V, Vo=0.75 V Vin=5.0 V, Vo=1.2 V Vin=5.0 V, Vo=1.5 V Vin=5.0 V, Vo=1.8 V Vin=5.0 V, Vo=2.5 V Vin=5.0 V, Vo=3.3 V Note: Ripple and noise is 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=1.2 V 100% to 50% load step at Vin=5 V, Vo=1.2 V 50% to 100% load step at Vin=5 V, Vo=1.5 V 100% to 50% load step at Vin=5 V, Vo=1.5 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 Transient Response Waveforms (continued) 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=2.5 V 100% to 50% load step at Vin=5 V, Vo=2.5 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 is tested at di/dt=2.5 A/uS, with two 150 uF/16 V tantalum capacitors and 1uF/10 V ceramic capacitor, 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 RECOMMENDED PAD LAYOUT Pin Function 1 Remote On/Off 2 Vin 3 N/A 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. ©2007 Bel Fuse Inc. Specifications subject to change without notice. 011807 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