NON-ISOLATED DC/DC CONVERTERS 2.4 Vdc - 5.5 Vdc Input SRBC-10F2Ax 0.75 Vdc - 3.63 Vdc/10 A Output RoHS Compliant Rev.A • 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 On/Off • Flexible Output Voltage Sequencing • Converter Can Sink and Source Current • Remote Sense • Active Low/High (Option) Description The Bel SRBC-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 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 (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 95% SRBC-10F2AL SRBC-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 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-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) - 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 - - 2.2 V 2.0 V 0.2 A s - 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 I t Inrush Current Transient Turn-on Voltage Threshold Turn-off Voltage Threshold Notes Vo, set ≤ Vin-0.5 V Tested with two 100 uF/10 V tantalum input capacitors & simulated source impedance of 1uH, 5 Hz to 20 MHz. 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 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 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 ≥ 1m ohm ESR ≥ 10m ohm 2 Tested with 0-20 MHz, 10 uF/ 16 V tantalum capacitor & 1 uF/10 V TDK ceramic capacitor at the output Transient Response 50% ~ 100% Max Load Settling Time 100% ~ 50% Max Load Settling Time VO=3.3 V - 130 mV - - 50 uS - - 150 mV - - 50 uS - di/dt=2.5 A/uS; Vin=5 V; and with two 150 uF/16 V tantalum capacitors & 1 uF/10 V 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 Vdc - 5.5 Vdc Input 0.75 Vdc - 3.63 Vdc/10 A Output Output Specifications (continued) Parameter Min Typ Max - 130 mV - Notes Transient Response 50% ~ 100% Max Load Settling Time 100% ~ 50% Max Load VO=2.5 V Settling Time 50% ~ 100% Max Load Settling Time 100% ~ 50% Max Load VO=1.8 V Settling Time 50% ~ 100% Max Load Settling Time 100% ~ 50% Max Load VO=1.5 V Settling Time 50% ~ 100% Max Load Settling Time 100% ~ 50% Max Load VO=1.2 V Settling Time 50% ~ 100% Max Load Settling Time 100% ~ 50% Max Load VO=0.75 V Settling Time - 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 - di/dt=2.5 A/uS; Vin=5 V; and with two 150 uF/16 V tantalum capacitors & 1uF/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% 87% 85% 79% 250 kHz 0.7525 V - 95% 93% 91% 90% 88% 82% 300 kHz 350 kHz 3.63 V - 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 Switching Frequency Over Temperature Shutdown Output Trim Range (Wide Trim) Remote Sense Compensation MTBF 125 °C 10% Measured at Vin=5 V, full load Calculated Per Bell Core SR-332 (IO = Nominal; Ta = 25 °C) 6,643,156 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. 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 Signal Low (Unit Off) -0.3 V - 0.3 V Signal High (Unit On) 1.5 V - 5.8 V Signal Low (Unit On) -0.3 V - 0.3 V Signal High (Unit Off) 1.5 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 SRBC-10F2A0; Remote On/Off pin open, Unit on. SRBC-10F2AL; 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 Vdc - 5.5 Vdc Input 0.75 Vdc - 3.63 Vdc/10 A Output Efficiency Data 3.3V Vout 2.5V Vout 97.0% 95.0% 93.0% 91.0% 4.5V 5.0V 5.5V 89.0% Efficiency Efficiency 95.0% 87.0% 90.0% 85.0% 3.0V 3.3V 80.0% 5.0V 5.5V 75.0% 85.0% 1.0 2.0 3.0 4.0 5.0 6.0 7.0 8.0 9.0 1.0 10.0 2.0 3.0 4.0 5.0 6.0 7.0 8.0 9.0 10.0 Output Current (A) Output Current (A) Vo=3.3 V Vo=2.5 V 1.5V Vout 1.8V Vout 95.0% 95.0% 3.0V 85.0% 3.3V 5.0V 80.0% Efficiency Efficiency 90.0% 90.0% 85.0% 3.0V 3.3V 5.0V 5.5V 80.0% 75.0% 5.5V 70.0% 75.0% 1.0 2.0 3.0 4.0 5.0 6.0 7.0 8.0 9.0 1.0 10.0 2.0 3.0 4.0 Vo=1.8 V 6.0 7.0 8.0 9.0 10.0 Vo=1.5 V 1.2V Vout 0.75V Vout 95.0% 90.0% 90.0% 85.0% 85.0% 80.0% 80.0% 3.0V 3.3V 5.0V 5.5V 75.0% 70.0% 65.0% Efficiency Efficiency 5.0 Output Current (A) Output Current (A) 75.0% 3.0V 70.0% 3.3V 65.0% 5.0V 5.5V 60.0% 60.0% 55.0% 1.0 2.0 3.0 4.0 5.0 6.0 Output Current (A) Vo=1.2 V 7.0 8.0 9.0 10.0 1.0 2.0 3.0 4.0 5.0 6.0 7.0 8.0 Output Current (A) 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 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 Ripple and noise at full load, 0.75 V output Ripple and noise at full load, 1.2 V output Ripple and noise at full load, 1.5 V output Ripple and noise at full load, 1.8 V output Ripple and noise at full load, 2.5 V output Ripple and noise at full load, 3.3 V output Note: Ripple and noise at 5.0 V input, 0-20MHz BW, 10 uF/16 V tantalum cap 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 Transient Response Waveforms 50% to 100% load step at 0.75 V output 100% to 50% load step at 0.75 V output 50% to 100% load step at 1.2 V output 100% to 50% load step at 1.2 V output 50% to 100% load step at 1.5 V output 100% to 50% load step at 1.5 V 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 Vdc - 5.5 Vdc Input 0.75 Vdc - 3.63 Vdc/10 A Output Transient Response Waveforms (continued) 50% to 100% load step at 1.8 V output 100% to 50% load step at 1.8 V output 50% to 100% load step at 2.5 V output 100% to 50% load step at 2.5 V output 50% to 100% load step at 3.3 V output 100% to 50% load step at 3.3 V output Note: Transient response at 5.0 V input, di/dt=2.5 A/uS, with two 150 uF/16 V tantalum capacitors and 1 uF/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 BOTTOM VIEW RECOMMENDED PAD LAYOUT 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. ©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