NON-ISOLATED DC/DC CONVERTERS 4.5V-14V Input 0.75V-5.0V/3A Output S7BA-03E1Ax Series • Non-Isolated • OCP/SCP • Fixed Frequency • Remote On/Off • High Efficiency • Wide Trim Range • High Power Density • Wide Input Range • Under-voltage Lockout (UVLO) • Active Low/Active High (Option) Description The Bel S7BA-03E1Ax modules are a series of non-isolated DC/DC converters that deliver up to 3A of output current with full load efficiency of 93% at 5.0V output. These modules provide precisely regulated voltage programmable via external resistor from 0.75V to 5.0V over a wide range of input voltage. Their open-frame construction and small footprint enable designers to develop cost and space-efficient solutions. Standard features include remote On/Off, programmable output voltage and over current protection. Part Selection Output Voltage Input Voltage Max. Output Current Max. Output Power Typical Efficiency at 5.0V Model Number Active High Model Number Active Low 0.75V – 5.0V 4.5V - 14V 3A 15W 93% S7BA-03A1A0 S7BA-03A1AL 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 - 15V Output Enable Terminal Voltage -0.3V - 15V Ambient Temperature -40°C - 85°C Storage Temperature -55°C - 125°C Notes Note: All specifications are typical at 25°C unless otherwise stated. Input Specifications Parameter Min Typ Max 4.5V 7.0V 12V 12V 14V 14V Vo=5.0V Vo=3.3V Vo=0.75V - 1.35A 1.00A 0.25A 3.70A 2.50A 0.65A Vo=5.0V Vo=3.3V Vo=0.75V - 65mA 50mA 15mA 3mA 80mA 60mA 20mA 6mA Notes Input Voltage Vo,set≤3.3V Vo,set=5V Input Current (full load) Input Current (no load) Remote Off Input Current 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 4.5V-14V Input 0.75V-5.0V/3A Output Input Specifications (continued) Parameter Input Reflected Ripple Current (pk-pk) Vo=5.0V Vo=3.3V Vo=0.75V Input Reflected Ripple Current (RMS) Vo=5.0V Vo=3.3V Vo=0.75V I2t Inrush Current Transient Turn-on Voltage Threshold Vo set=5V Vo set≤3.3V Turn-off Voltage Threshold Vo set=5V Vo set≤3.3V Min Typ Max Notes - 150mA 100mA 35mA 200mA 150mA 45mA - 30mA 20mA 8mA 0.01A2s 40mA 35mA 15mA 0.02A2s - 5.5V 4.3V 6.5V 4.5V - 5.5V 4.0V 6.0V 4.3V Tested with simulated source impedance of 1uH, 5Hz to 20MHz and two 100uF/25V external input Tantalum capacitors. Output Specifications Parameter Output Voltage Set Point Min -2%Vo,set Typ - Max 2%Vo,set Output Voltage Set Point -3.5%Vo,set - 2.5%Vo,set Load Regulation Line Regulation Regulation Over Temperature (-40°C to +85°C) Output Current Current Limit Threshold Short Circuit Surge Transient Ripple and Noise1 (pk-pk) Vo=5.0V Vo=3.3V Vo=0.75V Ripple and Noise1 (RMS) Vo=5.0V Vo=3.3V Vo=0.75V Ripple and Noise2 (pk-pk) Vo=5.0V Vo=3.3V Vo=0.75V Ripple and Noise2 (RMS) Vo=5.0V Vo=3.3V Vo=0.75V Turn on Time Overshoot at Turn on Output Capacitance Transient Response 0.4%Vo,set 0.4%Vo,set 0.2%Vo,set 0.3%Vo,set 0.4%Vo,set 0.4%Vo,set - 0.5%Vo,set - 0A 5A - 2 0.1A s 3A 9.5A 0.2A2s - 100mV 80mV 55mV 120mV 100mV 80mV - 30mV 20mV 15mV 40mV 30mV 20mV - 60mV 40mV 20mV 80mV 50mV 30mV 0uF 15mV 12mV 5mV 8mS 0% - 25mV 20mV 10mV 12mS 3% 1200uF 50% ~ 100% Max Load Settling Time 100% ~ 50% Max Load Settling Time All - 150mV 25uS 150mV 25uS 200mV 40uS 200mV 40uS Notes Vin=12V, lo=lomax Over all operating input voltage, resistive load, and temperature conditions lo=lomin to lomax Vin=Vinmin to Vinmax Test conditions: 0-20MHz BW, with external 10uF/10V Tantalum capacitor and 1uF/10V ceramic capacitor at the output. Test conditions: 0-20MHz BW, with external 10uF/10V Tantalum capacitor 1uF/10V ceramic capacitor and two 22uF/10V ceramic capacitors at the output. Test conditions: di/dt = 2.5A/uS, Vin=12V, and with external 10uF/10V Tantalum capacitor and 1uF/10V ceramic capacitor at the output. Note: All specifications are typical at nominal input (Vin=12V), full load 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 4.5V-14V Input 0.75V-5.0V/3A Output General Specifications Parameter Min Typ Max 90% 88% 77% 200KHz 93% 91% 80% 230KHz 250KHz 0.7525V - 5V Notes Efficiency Vo=5.0V Vo=3.3V Vo=0.75V Switching Frequency Output Voltage Trim Range (Wide Trim) MTBF Calculated Per Bell Core TR-332 (IO = Nominal; Ta = 25°C) 6,350,000 hours Dimensions (Surface Mount) Inches (L × W × H) Millimeters (L × W × H) Weight - 0.8 x 0.45 x 0.251 20.32 x 11.42 x 6.38 2.5g Measured at Vin=12V, full load - Note: All specifications are typical at 25°C unless otherwise stated. Control Specifications Parameter Remote On/Off Min Typ Max Signal Low (Unit Off) -0.3V - 0.4V Signal High (Unit On) 2.5V - 14V Signal Low (Unit On) -0.3V - 0.4V Signal High (Unit Off) 2.5V - 14V Notes Remote On/Off pin open, Unit on. 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 = 10.507 −1 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 − 0.0667 × (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 4.5V-14V Input 0.75V-5.0V/3A Output Efficiency Data MODULE 5.0V EFFICIENCY 100.0% 90.0% 80.0% 7.0V 12.0V 14.0V 70.0% 60.0% 0.30A 0.75A 1.50A 2.25A OUTPUT CURRENT 3.00A EFFICIENCY MODULE 3.3V 95.0% 90.0% 85.0% 80.0% 75.0% 70.0% 65.0% 60.0% 0.30A 4.5V 12.0V 14.0V 0.75A 1.50A 2.25A 3.00A OUTPUT CURRENT MODULE 0.75V EFFICIENCY 90.0% 80.0% 70.0% 4.5V 60.0% 12.0V 50.0% 14.0V 0.30A 1.75A 1.50A 2.25A 3.00A OUTPUT CURRENT 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 4.5V-14V Input 0.75V-5.0V/3A Output Thermal Derating Curves Vin=12V, Vo=5.0V Vin=12V, Vo=3.3V Vin=12V, Vo=0.75V 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 4.5V-14V Input 0.75V-5.0V/3A Output Pin Connections Pin Function 1 Remote On/Off 2 Vin 3 N/A 4 Ground 5 Trim 6 Vout RECOMMENDED PAD LAYOUT PAD SIZE: MIN: 0.12” *0.095” (3.05mm*2.41mm) MAX: 0.135”*0.11” (3.43mm*2.79mm) ©2005 Bel Fuse Inc. Specifications subject to change without notice. 020605 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