NON-ISOLATED DC/DC CONVERTERS 2.4 V-5.5 V Input 0.75 V-3.63 V/6 A Output SRBA-06F1Ax Series RoHS Compliant • Non-Isolated • Under-voltage Lockout (UVLO) • High Efficiency • Wide Trim • High Power Density • OCP/SCP • Fixed Frequency (300 kHz) • Remote On/Off • Converter Can Sink and Source Current • Active Low/High (option) Description The Bel SRBA-06F1Ax modules are a series of non-isolated dc/dc converters that deliver up to 6A of output current with full load efficiency of 93% 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 V-5.5 V). The open-frame construction and small footprint enable designers to develop cost and space-efficient solutions. Standard features include remote On/Off, over current protection, short circuit 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 6A 21.8 W 93% SRBA-06F1AL SRBA-06F1A0 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. Absolute Maximum Ratings Min Typ Max Input Voltage (continuous) Parameter -0.3 V - 5.8 V Output Enable Terminal Voltage -0.3 V - 5.5 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 V-5.5 V Input 0.75 V-3.63 V/6 A Output Input Specifications Parameter Input Voltage Input Current (full load) Min 2.4 V Typ - Max 5.5 V Notes Vo, set ≤ Vin-0.5 V Vo=3.3V Vo=2.5V Vo=1.8V Vo=1.5V Vo=1.2V Vo=0.75V - - 4.73 A 3.66 A 4.09 A 4.31 A 3.57 A 2.40 A Vo=3.3 V Vo=0.75 V Remote Off Input Current - 50 mA 25 mA 0.6 mA - Input Reflected Ripple Current (pk-pk) - 120 mA - Input Reflected Ripple Current (rms) - 35 mA - I t Inrush Current Transient - - 0.04 A2s Turn-on Voltage Threshold - 2.05 V 2.4 V Turn-off Voltage Threshold 1.8 V 2.0 V - Input Current (no load) 2 Tested with simulated source impedance of 1 uH, 5 Hz to 20 MHz, one 1000 uF/25 V AL capacitor and two 100 uF/ 10 V Tantalum capacitor at the input. 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 0.7525 V - 3.63 V - 0.4% Vo,set 0.3% Vo,set - Io=Io, min to 50%Io, max Vin=50% Vin, min to Vin, max - 0.4% Vo,set - Tref=Ta, min to Ta, max 0A 9A - 6A 18 A Short Circuit Surge Transient - 0.32 A s - Ripple and Noise (pk-pk) - 40 mV 70 mV Ripple and Noise (rms) - 10 mV 30 mV 6 mS - 10 mS 3% - 1000 uF 3000 uF Adjustment Range Selected by External Resistor or Voltage Load Regulation Line Regulation Regulation Over Temperature (-40 °C to +85 °C) Output Current Current Limit Threshold Turn on Time Overshoot at Turn on Output Capacitance ESR ≥ 1mohm 0 uF 0 uF ESR ≥ 10mohm Transient Response 50% ~ 100% Max Load Settling Time VO = 0.75 V 3.63 V 100% ~ 50% Max Load Settling Time 2 - 130 mV 25 uS 130 mV 25 uS Notes Vin=5 V, lo=50%lo,max Over all operating input voltages, resistive loads and temperature conditions Tested with 0-20 MHz, with 10 uF Tantalum capacitor & 1 uF/10 V ceramic capacitor at the output. - di/dt=2.5 A/uS; Vin=5 V; and with 10 uF Tantalum capacitor & 1 uF/10 V TDK ceramic capacitor at the output Note: All specifications are typical at nominal input, 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 2.4 V-5.5 V Input 0.75 V-3.63 V/6 A Output General Specifications Parameter Min Typ Max 250 kHz 0.7525 V 93% 91% 88% 87% 84% 78% 300 kHz 135 °C - 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 Voltage Trim Range MTBF Measured at Vin=5 V, full load Calculated Per Bell Core SR-332 (Vin=5 V; Vo=0.75 V; IO = 4.8 A; Ta = 25°C) 6,954,974 hours Dimensions Inches (L × W × H) Millimeters (L × W × H) Weight - 1.0 x 0.5 x 0.243 25.4 x 12.7 x 6.16 5g - 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) Min Typ Max Notes -0.2 V -0.2 V 1.5 V - 0.3 V Vin, max 0.3 V Vin, max SRBA-06F1A0; Remote On/Off pin open, Unit on. SRBA-06F1AL; 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 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 V-5.5 V Input 0.75 V-3.63 V/6 A Output Efficiency Data 2.5 V Module 100.0% 100.0% 95.0% 95.0% 90.0% 90.0% 85.0% 4.5 V 5.0 V 5.5 V 80.0% 75.0% Efficiency Efficiency 3.3 V Module 70.0% 70.0% 65.0% 65.0% 0.6 A 60.0% 1.5 A 3.0 A 4.5 A 0.6 A 6.0 A 1.5 V Module 90.0% 85.0% 3.0 V 5.0 V 5.5 V 80.0% Efficiency 95.0% 90.0% 75.0% 85.0% 70.0% 65.0% 65.0% 4.5 A 2.4 V 5.0 V 5.5 V 80.0% 70.0% 3.0 A 6.0 A 75.0% 60.0% 60.0% 0.6 A 6.0 A 1.5 A Output Current 3.0 A 4.5 A 6.0 A Output Current 0.7525 V Module 1.2 V Module 100.0% 100.0% 95.0% 95.0% 90.0% 90.0% 85.0% 2.4 V 5.0 V 5.5 V 80.0% 75.0% Efficiency Efficiency 4.5 A 1.8 V Module 95.0% 85.0% 2.4 V 5.0 V 5.5 V 80.0% 75.0% 70.0% 70.0% 65.0% 65.0% 60.0% 0.6 A 3.0 A Output Current 100.0% 1.5 A 1.5 A Output Current 100.0% 0.6 A 4.5 V 5.0 V 5.5 V 80.0% 75.0% 60.0% Efficiency 85.0% 60.0% 1.5 A 3.0 A Output Current 4.5 A 6.0 A 0.6 A 1.5 A 3.0 A 4.5 A 6.0 A 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 2.4 V-5.5 V Input 0.75 V-3.63 V/6 A Output Thermal Derating Curves Vin=5 V, Vo = 3.3 V Vin=4.5 V, Vo = 2.5 V Vin=5 V, Vo = 0.75 V Vin=3.3 V, Vo = 0.75 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/6 A Output Mechanical Outline RECOMMENDED PAD LAYOUT Pin Connections Pin Function 1 Remote On/Off 2 Vin 3 Ground 4 Trim 5 Vout PAD SIZE: MIN: 0.12"* 0.095" (3.05mm * 2.41mm) MAX: 0.135"* 0.11" (3.43mm * 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. ©2005 Bel Fuse Inc. Specifications subject to change without notice. 121305 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