NON-ISOLATED DC/DC CONVERTERS 2.4 Vdc - 5.5 Vdc Input SRBA-06F2Ax 0.75 Vdc - 3.63 Vdc/6 A Output RoHS Compliant Rev.A • Non-Isolated • Under-voltage Lockout (UVLO) • High Efficiency • OCP/SCP • High Power Density • Wide Input • Excellent Thermal Performance • Wide Trim Range • Low Cost • Active Low/High (option) • Remote On/Off • Able to Sink & Source Current • Flexible Output Voltage Sequencing • Fixed Frequency (300 kHz) Description The Bel SRBA-06F2Ax modules are a series of non-isolated dc/dc converters that deliver up to 6 A of output current with full load efficiency of 93% 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, 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-06F2AL SRBA-06F2A0 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. 3. All part numbers above indicate RoHS 6. Change the second letter "R" to "7" for RoHS 5 part numbers. 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 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. SRBA-06F2Ax 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/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=3.3 V Vo=2.5 V Vo=1.8 V Vo=1.5 V Vo=1.2 V Vo=0.75 V - - 4.73 A 5.49 A 5.11 A 4.31 A 3.57 A 2.40 A Vo=3.3 V Vo=0.75 V Remote Off Input Current Input Reflected Ripple Current (pk-pk) Input Reflected Ripple Current (rms) - 50 mA 25 mA 0.6 mA 120 mA 35 mA - I2t Inrush Current Transient - - 0.04 A2s Turn-on Voltage Threshold Turn-off Voltage Threshold 1.8 V 2.05 V 2.0 V 2.4 V - Input Current (no load) Tested with simulated source impedance of 1uH, 5 Hz to 20 MHz. 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 Load Regulation - 0.4%Vo,set - Line Regulation Regulation Over Temperature (-40 °C to +85 °C) Output Current Current Limit Threshold - 0.3%Vo,set - Io=0%~50% full load; Io=50%~100% full load Vin=Vinmin to Vinmax - 0.4%Vo,set - Tref=Tamin to Tamax 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 Turn on Time Overshoot at Turn on Output Capacitance - 6 mS 0% 10 mS 3% 0 uF 0 uF - 1000 uF 3000 uF Adjustment Range Selected by External Resistor or Voltage ESR ≥ 1mohm ESR ≥ 10mohm 2 Notes Vin=5 V, 50% full load Over all operating input voltages, resistive loads and temperature conditions Hiccup mode Tested with 0-20 MHz, with 10 uF tantalum capacitor & 1uF/10 V ceramic capacitor at output Transient Response 50% ~ 100% Max Load Settling Time 100% ~ 50% Max Load Settling Time VO = 0.75 V 3.63 V - 130 mV 25 uS 130 mV 25 uS - di/dt=2.5 A/ uS; Vin=5 V; and with 10 uF tantalum capacitor & 1 uF/10 V TDK ceramic capacitor at 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 Vdc - 5.5 Vdc Input 0.75 Vdc - 3.63 Vdc/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) 6,976,379 hours Dimensions Inches (L × W × H) Millimeters (L × W × H) Weight - 0.8 x 0.45 x 0.25 20.32 x 11.42 x 6.36 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) Sequencing Voltage Sequencing Slew Rate Capability Sequencing Delay Time Min Typ Max -0.2 V -0.2 V 1.5 V - 0.3 V Vin, max 0.3 V Vin, max 0V - Vin - - 2 V/ mS 10 mS - - - 100 mV 200 mV 200 mV 400 mV Notes Active High: SRBA-06F2A0; Remote On/Off pin open, Unit on. Active Low: SRBA-06F2AL; Remote On/Off pin open, Unit on. Sequencing Voltage applied on SEQ pin should be higher than output voltage. Delay from Vinmin 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 RTrimUp = 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 VTrimUp = 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 Vdc - 5.5 Vdc Input 0.75 Vdc - 3.63 Vdc/6 A Output Efficiency Data Efficiency Curve Efficiency Curve 100.0% 100.0% 95.0% 95.0% 90.0% 85.0% 4.5 V 5.0 V 5.5 V 80.0% 75.0% Efficiency Efficiency 90.0% 85.0% 3.0 V 5.0 V 5.5 V 80.0% 75.0% 70.0% 70.0% 65.0% 65.0% 60.0% 60.0% 0.6 1.5 3.0 4.5 0.6 6.0 1.5 Output Current (A) Vo=3.3 V Vo=2.5 V Efficiency Curve Efficiency Curve 100.0% 100.0% 95.0% 95.0% 4.5 6.0 90.0% 85.0% 3.0 V 5.0 V 5.5 V 80.0% 75.0% Efficiency Efficiency 90.0% 85.0% 3.0 V 5.0 V 5.5 V 80.0% 75.0% 70.0% 70.0% 65.0% 65.0% 60.0% 60.0% 0.6 1.5 3.0 4.5 0.6 6.0 1.5 3.0 Output Current (A) Output Current (A) Vo=1.8 V Vo=1.5 V Efficiency Curve Efficiency Curve 100.0% 100.0% 95.0% 95.0% 90.0% 4.5 6.0 90.0% 85.0% 3.0 V 5.0 V 5.5 V 80.0% 75.0% Efficiency Efficiency 3.0 Output Current (A) 85.0% 3.0 V 5.0 V 5.5 V 80.0% 75.0% 70.0% 70.0% 65.0% 65.0% 60.0% 60.0% 0.6 1.5 3.0 4.5 6.0 0.6 1.5 3.0 4.5 Output Current (A) Output Current (A) Vo=1.2 V Vo=0.7525 V 6.0 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/6 A Output Thermal Derating Curves Vin=5.0 V, Vo=3.3 V Vin=3.3 V, Vo=2.5 V Vin=5.0 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 Vdc - 5.5 Vdc Input 0.75 Vdc - 3.63 Vdc/6 A Output Ripple and Noise Waveforms Ripple and noise at full load, Vin=5.0 V, Vo=0.7525 V Ripple and noise at full load, Vin=5.0 V, Vo=1.2 V Ripple and noise at full load, Vin=5.0 V, Vo=1.5 V Ripple and noise at full load, Vin=5.0 V, Vo=1.8 V Ripple and noise at full load, Vin=5.0 V, Vo=2.5 V Ripple and noise at full load, Vin=5.0 V, Vo=3.3 V Note: Ripple and noise is tested at 0-20 MHz BW, 10 uF/10 V tantalum capacitor 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/6 A Output Transient Response Waveforms 50% to 100% load step at Vin=5 V, Vo=0.75 V 100% to 50% load step at Vin=5 V, Vo=0.75 V 50% to 100% load step at Vin=5 V, Vo=1.2 V 100% to 50% load step at Vin=5 V, Vo=1.2 V 50% to 100% load step at Vin=5 V, Vo=1.5 V 100% to 50% load step at Vin=5 V, Vo=1.5 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/6 A Output Transient Response Waveforms (continued) 50% to 100% load step at Vin=5 V, Vo=1.8 V 100% to 50% load step at Vin=5 V, Vo=1.8 V 50% to 100% load step at Vin=5 V, Vo=2.5 V 100% to 50% load step at Vin=5 V, Vo=2.5 V 50% to 100% load step at Vin=5 V, Vo=3.3 V 100% to 50% load step at Vin=5 V, Vo=3.3 V Note: Transient response is tested at di/dt=2.5 A/uS, with 10 uF/10 V tantalum capacitor 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/6 A Output Mechanical Outline Pin Connections Pin Function 1 Remote On/Off 2 Vin+ 3 SEQ PAD SIZE: 4 Ground MIN: 0.012"* 0.0095" (3.05mm * 2.41mm) 5 Trim MAX: 0.0135"* 0.011" (3.43mm * 2.79mm) 6 Vout+ 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. 011207 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