NON-ISOLATED DC/DC CONVERTERS 2.4V-5.5V Input 0.75V-3.63V/10A Output S7BC-10F2Ax Series • Non-Isolated • Under-Voltage Lockout (UVLO) • High Efficiency • Over Temperature Protection • High Power Density • Wide Input Range • Fixed Frequency(300KHz) • 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 S7BC-10F2Ax modules are a series of non-isolated dc-dc converters that deliver up to 10A of output current with full load efficiency of 95% at 3.3V output. These modules provide precisely regulated voltage programmable via external resistor from 0.75V to 3.63V over a wide range of input voltage (2.4V-5.5V). 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 Input Voltage Max. Output Current Max. Output Power Typical Efficiency Model Number Active Low Model Number Active High 0.75V – 3.63V 2.4V – 5.5V 10A 36.3W 95% S7BC-10F2AL S7BC-10F2A0 Note: Add “G” suffix at the end of the model number to indicate “Tray Packaging”. Absolute Maximum Ratings Min Typ Max Input Voltage (continuous) Parameter -0.3V - 5.8V Output Enable Terminal Voltage -0.3V - 5.8V 1 -0.3V - 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. S7BC-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. 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 2.4V-5.5V Input 0.75V-3.63V/10A Output Input Specifications Parameter Min Typ Max 4.5V 3.0V 2.4V - 5.5V 5.5V 5.5V Input Current (no load) - 7.0A 5.5A 4.0A 3.5A 3.0A 2.0A 80mA 8.0A 9.5A 9.0A 7.5A 6.0A 4.0A - Remote Off Input Current - 15mA - Input Reflected Ripple Current (pk-pk) - 140mA - Input Reflected Ripple Current (RMS) - 40mA - - 2.2V 2.0V 0.2A s - Notes Input Voltage Vo=3.3V Vo=1.8V~2.5V Vo ≤ 1.5V Input Current (full load) Vo=3.3V Vo=2.5V Vo=1.8V Vo=1.5V Vo=1.2V Vo=0.75V 2 I t Inrush Current Transient Turn-on Voltage Threshold Turn-off Voltage Threshold Tested with two 100uF/10V tantalum input capacitors & simulated source impedance of 1uH, 5Hz to 20MHz. 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=5V, 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 - 0.5%Vo,set - Tref=Ta, min to Ta, max 0A 15A - - 10A 27A 2 1.5A s Ripple and Noise (pk-pk) - 25mV 50mV Ripple and Noise (RMS) - 8mV 15mV Turn on Time Overshoot at Turn on Output Capacitance - 4mS 0%Vo,set 8mS 3%Vo,set 0uF 0uF - 1000uF 4700uF Load Regulation Line Regulation Regulation Over Temperature (-40°C to +85°C) Output Current Current Limit Threshold Short Circuit Surge Transient ESR ≥ 1mohm ESR ≥ 10mohm Tested with 0-20MHz, 10uF/16V tantalum capacitor & 1uF/10V TDK ceramic capacitor at the output Transient Response 50% ~ 100% Max Load Settling Time 100% ~ 50% Max Load Settling Time VO=3.3V - 130mV - - 50uS - - 150mV - - 50uS - di/dt=2.5A/uS; Vin=5V; and with two 150uF/16V tantalum capacitors & 1uF/10V 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 2.4V-5.5V Input 0.75V-3.63V/10A Output Output Specifications (continued) Parameter Min Typ Max Notes Transient Response 50% ~ 100% Max Load - Settling Time VO=2.5V 100% ~ 50% Max Load Settling Time 50% ~ 100% Max Load Settling Time VO=1.8V 100% ~ 50% Max Load Settling Time 50% ~ 100% Max Load Settling Time VO=1.5V 100% ~ 50% Max Load Settling Time 50% ~ 100% Max Load Settling Time VO=1.2V 100% ~ 50% Max Load Settling Time 50% ~ 100% Max Load Settling Time 100% ~ 50% Max Load VO=0.75V Settling Time 130mV - - 50uS - - 130mV - - 50uS - - 120mV - - 50uS - - 120mV - - 50uS - - 120mV - - 50uS - - 120mV - - 50uS - - 130mV - - 50uS - - 130mV - - 50uS - - 120mV - - 50uS - - 140mV - - 50uS - di/dt=2.5A/uS; Vin=5V; and with two 150uF/16V tantalum capacitors & 1uF/10V ceramic capacitor at the output Note: All specifications are typical at nominal input (Vin=5V), full load at 25°C unless otherwise stated. General Specifications Parameter Min Typ Max 92% 90% 88% 87% 85% 79% 250KHz 0.7525V - 95% 93% 91% 90% 88% 82% 300KHz 350KHz 3.63V - Notes Efficiency Vo=3.3V Vo=2.5V Vo=1.8V Vo=1.5V Vo=1.2V Vo=0.75V Switching Frequency Over Temperature Shutdown Output Trim Range (Wide Trim) Remote Sense Compensation MTBF 125°C 10% Measured at Vin=5V, full load Calculated Per Bell Core TR-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 6.6g - 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 2.4V-5.5V Input 0.75V-3.63V/10A Output Control Specifications Parameter Min Typ Max Signal Low (Unit Off) -0.3V - 0.3V Signal High (Unit On) 1.5V - 5.8V Signal Low (Unit On) -0.3V - 0.3V Signal High (Unit Off) 1.5V - 5.8V Sequencing Voltage 0.05V - Vin - - 2V/mS 10mS - - - 100mV 200mV 200mV 400mV Sequencing Slew Rate Capability Sequencing Delay Time Notes S7BC-10F2A0; Remote On/Off pin open, Unit on. S7BC-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 2.4V-5.5V Input 0.75V-3.63V/10A 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=3.3V Vo=2.5V 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=1.8V 6.0 7.0 8.0 9.0 10.0 Vo=1.5V 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=1.2V 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=0.7525V 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 2.4V-5.5V Input 0.75V-3.63V/10A Output Thermal Derating Curves Vin=5.0V, Vo=0.75V Vin=5.0V, Vo=1.5V Vin=5.0V, Vo=2.5V Vin=5.0V, Vo=3.3V 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 2.4V-5.5V Input 0.75V-3.63V/10A Output Thermal Derating Curves (continued) Vin=3.3V, Vo=0.75V Vin=3.3V, Vo=1.5V Vin=3.3V, Vo=2.5V 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 2.4V-5.5V Input 0.75V-3.63V/10A Output Pin Connections BOTTOM VIEW Pin Function 1 Remote On/Off 2 Vin 3 SEQ 4 Ground 5 Vout 6 Trim 7 Remote Sense RECOMMENDED PAD LAYOUT PAD SIZE: MIN: 0.14"* 0.095" (3.05mm * 2.41mm) MAX: 0.165"* 0.11" (3.43mm * 2.79mm) 2005 Bel Fuse Inc. Specifications subject to change without notice. 020405 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