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| NON-ISOLATED DC/DC CONVERTERS 2.4 V-5.5 V Input 0.75 V-3.63 V/16 A Output SRBC-16F2Ax Series * * * * * * * Non-Isolated High Efficiency High Power Density Fixed Frequency (300 kHz) OCP/SCP Flexible Output Voltage Sequencing Remote On/Off RoHS Compliant * * * * * * * Under-voltage Lockout (UVLO) Over Temperature Protection Wide Input Range Wide Trim Range Remote Sense Converter can sink and source current 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 0.75 V-3.63 V 1 Input Voltage 2.4 V-5.5 V Max. Output Current 16 A Max. Output Power 58.1 W Typical Efficiency 94% Model Number Active Low SRBC-16F2AL Model Number Active High SRBC-16F2A0 Model Number Active Low 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 Parameter Input Voltage (continuous) Output Enable Terminal Voltage Sequencing Voltage 1 Min -0.3 V -0.3 V -0.3 V -40 C -55 C Typ - Max 5.8 V 5.8 V Vin 85 C 125 C Notes Ambient Temperature Storage Temperature 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) Vo=3.3V Vo=2.5V Vo=1.8V Vo=1.5V Vo=1.2V Vo=0.75V Input Current (no load) Remote Off Input Current Input Reflected Ripple Current (pk-pk) Input Reflected Ripple Current (rms) I t Inrush Current Transient Turn-on Voltage Threshold Turn-off Voltage Threshold 2 Min 2.4 V - Typ 11.23 A 8.70 A 6.40 A 5.45 A 4.52 A 3.05 A 80 mA 10 mA 100 mA 40 mA 0.15 A s 2.2 V 2.0 V 2 Max 5.5 V 15.10 A 14.81 A 13.64 A 11.76 A 9.64 A 6.69 A 22 mA 0.3 A s 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. Output Specifications Parameter Output Voltage Set Point Output Voltage Set Point Load Regulation Line Regulation Regulation Over Temperature (-40 C to +85 C) Output Current Current Limit Threshold Short Circuit Surge Transient Ripple and Noise (pk-pk) Ripple and Noise (rms) Turn on Time Overshoot at Turn on Output Capacitance ESR 1 mohm ESR 10 mohm Min -2% Vo,set -3% Vo,set 0A 19 A 0 uF 0 uF Typ 0.4% Vo,set 0.3% Vo,set 0.5% Vo,set 1.6A s 25 mV 8 mV 4 mS 0% Vo,set 2 Max 2% Vo,set 3% Vo,set 16 A 35 A 2A s 50 mV 15 mV 8 mS 3% Vo,set 1000 uF 5000 uF 2 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 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 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 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 Min Typ Max Notes All All Note: All specifications are typical at nominal input (Vin=5 V), full load at 25 C unless otherwise stated. General Specifications Parameter 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 Dimensions Inches (L x W x H) Millimeters (L x W x H) Weight 1.30 x 0.53 x 0.315 33.02 x 13.46 x 8.00 6.6 g 92% 90% 88% 85% 82% 76% 250 kHz 0.7525 V 94% 92% 90% 88% 85% 79% 300 kHz 125 C 5,438,000 hours Min Typ Max 350 kHz 3.63 V 5% Notes Measured at Vin=5 V, full load Calculated Per Bell Core SR-332 (IO = Nominal; Ta = 25 C) 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) Sequencing Voltage Sequencing Slew Rate Capability Sequencing Delay Time Tracking Accuracy Power-Up Power-Down 100 mV 200 mV 200 mV 400 mV Min -0.3 V 1.5 V -0.3 V 1.5 V 0.05V 10 mS Typ Max 0.3 V 5.8 V 0.3 V 5.8 V Vin 2 V/mS Delay from Vin, min to application of voltage on SEQ pin Notes SRBC-16F2A0; Remote On/Off pin open, Unit on. SRBC-16F2AL & SRBC-16F2AW; Remote On/Off pin open, Unit on. Sequencing Voltage should be higher than output voltage. 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 k) 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 GND Rtrim 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 x (Vadj - 0.7525) Module Vout 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% 100.0% 95.0% 94.0% 92.0% 90.0% 88.0% 86.0% 84.0% 82.0% 80.0% 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 70.0% 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 90.0% 3.0V 3.3V 5V 5.5V 4.5V 5V 5.5V 80.0% 75.0% 85.0% Vo=3.3 V Vo=2.5 V 95.0% 90.0% 85.0% 80.0% 75.0% 70.0% 65.0% 60.0% 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 3V 3.3 5V 5.5V 95.0% 90.0% 85.0% 80.0% 75.0% 70.0% 65.0% 60.0% 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 3V 3.3V 5V 5.5V Vo=1.8 V Vo=1.5 V 95.0% 90.0% 85.0% 80.0% 75.0% 70.0% 65.0% 60.0% 55.0% 50.0% 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 3V 3.3V 5V 5.5 90.0% 85.0% 80.0% 75.0% 70.0% 65.0% 60.0% 55.0% 50.0% 45.0% 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 3V 3.3V 5V 5.5V Vo=1.2 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 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 Pin 1 2 3 4 5 6 7 Function Remote On/Off Vin SEQ Ground Vout Trim Remote Sense BOTTOM VIEW 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. (c)2005 Bel Fuse Inc. Specifications subject to change without notice. 120905 CORPORATE Bel Fuse Inc. 206 Van Vorst Street Jersey City, NJ 07302 Tel 201-432-0463 Fax 201-432-9542 www.belfuse.com FAR EAST 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 EUROPE 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 |
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