NON-ISOLATED DC/DC CONVERTERS 4.5 Vdc - 14 Vdc Input, 0.59 Vdc - 5.5 Vdc /3 A Outputs Bel Power, Inc. , a subsidiary of Bel Fuse, Inc. December 3, 2010 SLIN-03E2Ax RoHS Compliant Rev.F Features • Wide Input Voltage Range • Ability to Sink and Source Current • Fixed Switching Frequency • Cost Efficient Open Frame Design • Power Good Signal • Over Temperature Protection • Remote Sense • Output Over Current Protection • • • Remote On/Off Tunable LoopTM (a registered trademark of Lineage Power Systems) to Optimize Dynamic output voltage response Class 1, Category 2, Non-Isolated DC/DC Converter (refer to IPC-9592) • Compliant to RoHS EU Directive 2002/95/EC • Compatible in a Pb-free or SnPb reflow environment • UL* 60950-1Recognized, CSA† C22.2 No. 60950-1-03 Certified • VDE‡ 0805:2001-12 (EN60950-1) Licensed Applications • • • Distributed power architectures Intermediate bus voltage applications Telecommunications equipment • • • Servers and storage applications Networking equipment Industrial equipment Description The SLIN-03E2Ax power modules are non-isolated dc-dc converters that can deliver up to 3A of output current. These modules operate over a wide range of input voltage (VIN = 4.5Vdc-14Vdc) and provide a precisely regulated output voltage from 0.59Vdc to 5.5Vdc, programmable via an external resistor. Features include remote On/Off, adjustable output voltage, and over current and over temperature protection. A new feature, the Tunable LoopTM, allows the user to optimize the dynamic response of the converter to match the load with reduced amount of output capacitance leading to savings on cost and PWB area. Part Selection Output Voltage Input Voltage 0.59 Vdc - 5.5 Vdc 4.5 Vdc - 14 Vdc Max. Output Current 3A Typical Efficiency 91% Model Number Active High SLIN-03E2A0 Model Number Active Low SLIN-03E2AL Notes: Add “G” suffix at the end of the model number to indicate Tray Packaging. Part Number Explanation S LIN – 03 E 2A 0 1 2 3 4 5 6 1---Surface mount 2---Series code 3---Output current (3A) 4--- Wide input voltage range (4.5-14V) 5--- Wide output voltage range (0.59-5.5V) 6--- Enable, active high, change “0” to “L” means active low Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 • Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com 1 NON-ISOLATED DC/DC CONVERTERS 4.5 Vdc - 14 Vdc Input, 0.59 Vdc - 5.5 Vdc /3 A Outputs Bel Power, Inc. , a subsidiary of Bel Fuse, Inc. December 3, 2010 Absolute Maximum Ratings Min Typ Max Unit Continuous Input Voltage -0.3 - 15 V Operating Ambient Temperature -40 - 85 °C Storage Temperature -55 - 125 °C Parameter Notes Note: Stresses in excess of the absolute maximum ratings can cause permanent damage to the device. These are absolute stress ratings only, functional operation of the device is not implied at these or any other conditions in excess of those given in the operations sections of the data sheet. Exposure to absolute maximum ratings for extended periods can adversely affect the device reliability. Input Specifications Parameter Operating Input Voltage Min 4.5 Typ - Max 14 Unit V Notes Input Current (full load) - - 3.5 A - 17 55 - mA mA VIN=12V, module enabled Input Stand-by Current - 1 - mA VIN = 12.0Vdc, module disabled Input Reflected Ripple Current (pk-pk) - 43 - mA 5Hz to 20MHz, 1μH source impedance; VIN =0 to 14V, IO= IOmax ; See Test Configurations I2t Inrush Current Transient - - 1 A2s Input Ripple Rejection (120Hz) - 50 - dB Turn-on Threshold - - 4.3 V Turn-off Threshold 3.3 - - V Hysteresis 0.4 - - V VIN=4.5V to 14V Input Current (no load) Vo=0.6V Vo=3.3V CAUTION: This converter is not internally fused. An input line fuse must be used in application. This power module can be used in a wide variety of applications, ranging from simple standalone operation to an integrated part of sophisticated power architecture. To preserve maximum flexibility, internal fusing is not included; however, to achieve maximum safety and system protection, always use an input line fuse. The safety agencies require a fast-acting fuse with a maximum rating of 5A. Based on the information provided in this data sheet on inrush energy and maximum dc input current, the same type of fuse with a lower rating can be used. Refer to the fuse manufacturer’s data sheet for further information. Note: Unless otherwise indicated, specifications apply over all operating input voltage, resistive load, and temperature conditions. Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 • Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com 2 NON-ISOLATED DC/DC CONVERTERS 4.5 Vdc - 14 Vdc Input, 0.59 Vdc - 5.5 Vdc /3 A Outputs Bel Power, Inc. , a subsidiary of Bel Fuse, Inc. December 3, 2010 Output Specifications Parameter Min Typ Max Unit Output Voltage Set Point -1.5 - +1.5 %Vo,set Output Voltage -3.0 - +3.0 %Vo,set Adjustment Range1 0.59 - 5.5 V - - 0.5 V VO ≥ 2.5V VO < 2.5V - - 10 5 mV mV VO ≥ 2.5V VO < 2.5V - - 0.4 10 %Vo,set mV Temperature Regulation (-40°C to +85°C) - - 0.4 %Vo,set Ripple and Noise (pk-pk) - 50 110 mV Ripple and Noise (rms) - 20 40 mV Ripple and Noise (pk-pk) - 110 135 mV Ripple and Noise (rms) - 35 45 mV Output Current Range 0 - 3 A Output DC Current Limit - 200 - %Io,max Output Short-Circuit Current - 300 - mA Vo≤250mV, Hiccup Mode Output Capacitance2 ESR≥ 1 mΩ ESR≥0.15 mΩ ESR≥ 10 mΩ 0 0 0 - 47 1000 3000 uF uF uF Without the Tunable Loop With the Tunable LoopTM With the Tunable LoopTM Remote Sense Range Notes with 0.5% tolerance for external resistor used to set output voltage Over all operating input voltage, resistive load, and temperature conditions until end of life selected by an external resistor Load Regulation IO=IO, min to IO, max Line Regulation VIN=VIN, min to VIN, max VO ≤ 3.3V , 5Hz to 20MHz BW, VIN=VIN, nom and IO=IO, min to IO, max Co = 0.1μF // 10 μF ceramic capacitors) VO > 3.3V , 5Hz to 20MHz BW, VIN=VIN, nom and IO=IO, min to IO, max Co = 0.1μF // 10 μF ceramic capacitors) in either sink or source mode Hiccup Mode TM Case 1: On/Off input is enabled and then input power is applied (delay from instant at which VIN = VIN, min until Vo =10% of Vo, set) Case 2: Input power is applied for at least one second and then the On/Off input is enabled (delay from instant at which Von/Off is enabled until Vo =10% of Vo, set) - 2 - mS - 2 - mS Output voltage Rise time - 4 - mS time for Vo to rise from 10% of Vo, set to 90% of Vo, set Output voltage overshoot - - 3 %Vo,set Vin=Vin, min to Vin, max, Io=Io, min to Io, max, With or without maximum external capacitance Turn-On Delay Time Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 • Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com 3 NON-ISOLATED DC/DC CONVERTERS 4.5 Vdc - 14 Vdc Input, 0.59 Vdc - 5.5 Vdc /3 A Outputs Bel Power, Inc. , a subsidiary of Bel Fuse, Inc. December 3, 2010 Output Specifications (Continued) Dynamic Load Response △V50%~100% of Max Load △V100%~50% of Max Load Peak Deviation - 220 - mV Settling Time - 60 - uS Peak Deviation - 240 - mV Settling Time - 60 - uS di/dt=10A/us, Vin=Vin,nom, Vo=1.8V, Ta=25°C, Co=0 Notes: 1. Some output voltages may not be possible depending on the input voltage. 2. External capacitors may require using the new Tunable LoopTM feature to ensure that the module is stable as well as getting the best transient response (See the Tunable LoopTM section for details). 3. Unless otherwise indicated, specifications apply over all operating input voltage, resistive load, and temperature conditions. General Specifications Parameter Min Typ Max Unit - 73.3 82.9 86.5 88.9 90.6 92.6 - % % % % % % Switching Frequency - 600 - kHz Over Temperature Protection - 140 - °C - - 100 100 mV mV 90 - 7 110 50 %Vo,set Ω - 1.55 - g Notes Efficiency Vo=0.59V Vo=1.2V Vo=1.8V Vo=2.5V Vo=3.3V Vo=5.0V Tracking Accuracy Power-Up: 2V/ms Power-Down: 2V/ms PGOOD (Power Good) Output Voltage Limit for PGOOD Pulldown resistance of PGOOD pin Weight MTBF 25,017,068 hours 0.48 x 0.48 x 0.246 12.19 x 12.19 x 6.25 - Vin= 12Vdc, Ta=25°C Io=Io, max , Vo= Vo,set Vin, min to Vin, max; Io, min to Io, max Signal Interface Open Drain, Vsupply ≤ 5Vdc Calculated Per Bell Core SR-332 (Io=0.8Io, max, Ta=40°C, Telecordia Issue 2 Method 1 Case 3) Dimensions Inches (L × W × H) Millimeters (L × W × H) Note: Unless otherwise indicated, specifications apply over all operating input voltage, resistive load, and temperature conditions. Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 • Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com 4 NON-ISOLATED DC/DC CONVERTERS 4.5 Vdc - 14 Vdc Input, 0.59 Vdc - 5.5 Vdc /3 A Outputs Bel Power, Inc. , a subsidiary of Bel Fuse, Inc. December 3, 2010 Efficiency Data 85 90 85 EFFICIENCY, η (%) EFFICIENCY, η (%) 80 75 Vin=4.5V 70 65 Vin=12V Vin=14V 60 55 Vin=4.5V 80 Vin=14V Vin=12V 75 70 65 0 0.5 1 1.5 2 2.5 3 0 0.5 OUTPUT CURRENT, IO (A) 95 95 90 90 EFFICIENCY, η (%) EFFICIENCY, η (%)) 2 2.5 3 Vo=1.2V 85 Vin=4.5V Vin=14V Vin=12V 75 70 Vin=4.5V 85 Vin=14V Vin=12V 80 75 70 0 0.5 1 1.5 2 2.5 3 0 0.5 OUTPUT CURRENT, IO (A) 95 95 EFFICIENCY, η (%) 100 90 Vin=4.5V Vin=14V Vin=12V 80 1.5 2 2.5 3 Vo=2.5V 100 85 1 OUTPUT CURRENT, IO (A) Vo=1.8V EFFICIENCY, η (%)) 1.5 OUTPUT CURRENT, IO (A) Vo=0.6V 80 1 75 70 90 Vin=14V 85 Vin=8V Vin=12V 80 75 70 0 0.5 1 1.5 2 OUTPUT CURRENT, IO (A) Vo=3.3V 2.5 3 0 0.5 1 1.5 2 2.5 3 OUTPUT CURRENT, IO (A) Vo=5.0V Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 • Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com 5 NON-ISOLATED DC/DC CONVERTERS 4.5 Vdc - 14 Vdc Input, 0.59 Vdc - 5.5 Vdc /3 A Outputs Bel Power, Inc. , a subsidiary of Bel Fuse, Inc. December 3, 2010 Thermal Derating Curves 4 3 2 1 0 45 55 65 75 85 OUTPUT CURRENT, Io (A) OUTPUT CURRENT, Io (A) 4 3 2 1 0 45 AMBIENT TEMPERATURE, TA OC 55 85 Vo=1.2V 4 3 2 1 0 45 55 65 75 85 OUTPUT CURRENT, Io (A) 4 OUTPUT CURRENT, Io (A) 75 AMBIENT TEMPERATURE, TA OC Vo=0.6V 3 2 1 0 45 AMBIENT TEMPERATURE, TA OC 55 65 75 85 AMBIENT TEMPERATURE, TA OC Vo=1.8V Vo=2.5V 4 4 3 2 1 0 45 55 65 75 AMBIENT TEMPERATURE, TA OC Vo=3.3V 85 OUTPUT CURRENT, Io (A) OUTPUT CURRENT, Io (A) 65 3 2 1 0 45 55 65 75 85 AMBIENT TEMPERATURE, TA OC Vo=5.0V Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 • Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com 6 NON-ISOLATED DC/DC CONVERTERS 4.5 Vdc - 14 Vdc Input, 0.59 Vdc - 5.5 Vdc /3 A Outputs December 3, 2010 Bel Power, Inc. , a subsidiary of Bel Fuse, Inc. OUTPUT VOLTAGE VO (V) (10mV/div) OUTPUT VOLTAGE VO (V) (10mV/div) Ripple and Noise Waveforms TIME, t (1μs/div) TIME, t (1μs/div) Vin=12V, Vo=1.2V, Io = Io,max OUTPUT VOLTAGE VO (V) (10mV/div) OUTPUT VOLTAGE VO (V) (10mV/div) Vin=12V, Vo=0.6V, Io = Io,max TIME, t (1μs/div) TIME, t (1μs/div) Vin=12V, Vo=2.5V, Io = Io,max OUTPUT VOLTAGE VO (V) (20mV/div) OUTPUT VOLTAGE VO (V) (10mV/div) Vin=12V, Vo=1.8V, Io = Io,max TIME, t (1μs/div) Vin=12V, Vo=3.3V, Io = Io,max TIME, t (1μs/div) Vin=12V, Vo=5.0V, Io = Io,max . Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 • Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com 7 NON-ISOLATED DC/DC CONVERTERS 4.5 Vdc - 14 Vdc Input, 0.59 Vdc - 5.5 Vdc /3 A Outputs Bel Power, Inc. , a subsidiary of Bel Fuse, Inc. December 3, 2010 OUTPUT VOLTAGE VO (V) (100mV/div) Transient Response to Dynamic Load Change from 0% to 50% to 0%. Vo=1.2V TIME, t (20μs /div) Transient Response to Dynamic Load Change from 0% to 50% to 0%. Vo=2.5V OUTPUT VOLTAGE VO (V) (200mV/div) OUTPUT VOLTAGE VO (V) (200mV/div) OUTPUT CURRENT, IO (A) (1Adiv) OUTPUT VOLTAGE VO (V) (100mV/div) OUTPUT CURRENT, IO (A) (1Adiv) TIME, t (20μs /div) Transient Response to Dynamic Load Change from 0% to 50% to 0%. Vo=1.8V OUTPUT CURRENT, IO (A) (1Adiv) TIME, t (20μs /div) OUTPUT VOLTAGE VO (V) (100mV/div) Transient Response to Dynamic Load Change from 0% to 50% to 0%. Vo=0.6V OUTPUT CURRENT, IO (A) (1Adiv) TIME, t (20μs /div) TIME, t (20μs /div) Transient Response to Dynamic Load Change from 0% to 50% to 0%. Vo=3.3V OUTPUT CURRENT, IO (A) (1Adiv) OUTPUT CURRENT, IO (A) (1Adiv) OUTPUT VOLTAGE VO (V) (100mV/div) Transient Response Waveforms TIME, t (20μs /div) Transient Response to Dynamic Load Change from 0% to 50% to 0%. Vo=5.0V Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 • Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com 8 NON-ISOLATED DC/DC CONVERTERS 4.5 Vdc - 14 Vdc Input, 0.59 Vdc - 5.5 Vdc /3 A Outputs Bel Power, Inc. , a subsidiary of Bel Fuse, Inc. December 3, 2010 ON/OFF VOLTAGE OUTPUT VOLTAGE VON/OFF (V) (5V/div) VO (V) (500mV/div) Start-up Using On/Off Voltage (Io = Io,max), Vo=0.6V TIME, t (2 ms/div) ON/OFF VOLTAGE OUTPUT VOLTAGE VO (V) (1V/div) VON/OFF (V) (5V/div) Start-up Using On/Off Voltage (Io = Io,max), Vo=1.8V TIME, t (2 ms/div) Start-up Using On/Off Voltage (Io = Io,max), Vo=3.3V ON/OFF VOLTAGE OUTPUT VOLTAGE VO (V) (500mV/div) VON/OFF (V) (5V/div) TIME, t (2 ms/div) Start-up Using On/Off Voltage (Io = Io,max), Vo=1.2V ON/OFF VOLTAGE OUTPUT VOLTAGE VO (V) (1V/div) VON/OFF (V) (5V/div) TIME, t (2 ms/div) TIME, t (2 ms/div) Start-up Using On/Off Voltage (Io = Io,max), Vo=2.5V ON/OFF VOLTAGE OUTPUT VOLTAGE VO (V) (2V/div) VON/OFF (V) (5V/div) ON/OFF VOLTAGE OUTPUT VOLTAGE VO (V) (200mV/div) VON/OFF (V) (5V/div) Startup Time TIME, t (2 ms/div) Start-up Using On/Off Voltage (Io = Io,max), Vo=5.0V Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 • Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com 9 NON-ISOLATED DC/DC CONVERTERS 4.5 Vdc - 14 Vdc Input, 0.59 Vdc - 5.5 Vdc /3 A Outputs Bel Power, Inc. , a subsidiary of Bel Fuse, Inc. December 3, 2010 INPUT VOLTAGE VIN (V) (5V/div) OUTPUT VOLTAGE VO (V) (500mV/div) Start-up Using Input Voltage (VIN = 12V, Io = Io,max ), Vo=0.6V TIME, t (2 ms/div) INPUT VOLTAGE OUTPUT VOLTAGE VO (V) (1V/div) VIN (V) (5V/div) Start-up Using Input Voltage (VIN = 12V, Io = Io,max ), Vo=1.8V TIME, t (2 ms/div) Start-up Using Input Voltage (VIN = 12V, Io = Io,max ), Vo=3.3V INPUT VOLTAGE OUTPUT VOLTAGE VO (V) (500mV/div) VIN (V) (5V/div) TIME, t (2 ms/div) Start-up Using Input Voltage (VIN = 12V, Io = Io,max ), Vo=1.2V INPUT VOLTAGE OUTPUT VOLTAGE VO (V) (1V/div) VIN (V) (5V/div) TIME, t (2 ms/div) TIME, t (2 ms/div) Start-up Using Input Voltage (VIN = 12V, Io = Io,max ), Vo=2.5V INPUT VOLTAGE OUTPUT VOLTAGE VO (V) (2V/div) VIN (V) (5V/div) INPUT VOLTAGE VIN (V) (5V/div) OUTPUT VOLTAGE VO (V) (200mV/div) Startup Time (continued) TIME, t (2 ms/div) Start-up Using Input Voltage (VIN = 12V, Io = Io,max ), Vo=5.0V Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 • Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com 10 NON-ISOLATED DC/DC CONVERTERS 4.5 Vdc - 14 Vdc Input, 0.59 Vdc - 5.5 Vdc /3 A Outputs Bel Power, Inc. , a subsidiary of Bel Fuse, Inc. December 3, 2010 Test Configurations Input Reflected Ripple Current Test Setup. CURRENT PROBE TO OSCILLOSCOPE LTEST VIN(+) BATTERY 1μH CIN CS 1000μF Electrolytic 2x100μF Tantalum E.S.R.<0.1Ω @ 20°C 100kHz COM NOTE: Measure input reflected ripple current with a simulated source inductance (LTEST) of 1μH. Capacitor CS offsets possible battery impedance. Measure current as shown above. Output Ripple and Noise Test Setup COPPER STRIP RESISTIVE LOAD Vo+ 0.1uF 10uF COM SCOPE USING BNC SOCKET GROUND PLANE NOTE: All voltage measurements to be taken at the module terminals, as shown above. If sockets are used then Kelvin connections are required at the module terminals to avoid measurement errors due to socket contact resistance. Output Voltage and Efficiency Test Setup Rdistribution Rcontact Rcontact VIN(+) RLOAD VO VIN Rdistribution Rcontact Rcontact COM Rdistribution VO Rdistribution COM NOTE: All voltage measurements to be taken at the module terminals, as shown above. If sockets are used then Kelvin connections are required at the module terminals to avoid measurement errors due to socket contact resistance. VO. IO Efficiency η = VIN. IIN x 100 % Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 • Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com 11 NON-ISOLATED DC/DC CONVERTERS 4.5 Vdc - 14 Vdc Input, 0.59 Vdc - 5.5 Vdc /3 A Outputs Bel Power, Inc. , a subsidiary of Bel Fuse, Inc. December 3, 2010 Input Filtering The SLIN-03E2Ax module should be connected to a low ac-impedance source. A highly inductive source can affect the stability of the module. Input capacitance must be placed directly adjacent to the input pin of the module, to minimize input ripple voltage and ensure module stability. To minimize input voltage ripple, ceramic capacitors are recommended at the input of the module. The figure below shows the input ripple voltage for various output voltages at 3A of load current with 1x10 µF or 1x22 µF ceramic capacitors and an input of 12V. Input Ripple Voltage (mVp-p) 250 1x10uF 200 1x22uF 150 100 50 0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5 Output Voltage (Vdc) Output Filtering The SLIN-03E2Ax modules are designed for low output ripple voltage and will meet the maximum output ripple specification with 0.1 µF ceramic and 10 µF ceramic capacitors at the output of the module. However, additional output filtering may be required by the system designer for a number of reasons. First, there may be a need to further reduce the output ripple and noise of the module. Second, the dynamic response characteristics may need to be customized to a particular load step change. To reduce the output ripple and improve the dynamic response to a step load change, additional capacitance at the output can be used. Low ESR polymer and ceramic capacitors are recommended to improve the dynamic response of the module. The figure on the next page provides output ripple information for different external capacitance values at various Vo and for a load current of 3A. For stable operation of the module, limit the capacitance to less than the maximum output capacitance as specified in the electrical specification table. Optimal performance of the module can be achieved by using the Tunable LoopTM feature described later in this data sheet. Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 • Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com 12 NON-ISOLATED DC/DC CONVERTERS 4.5 Vdc - 14 Vdc Input, 0.59 Vdc - 5.5 Vdc /3 A Outputs Bel Power, Inc. , a subsidiary of Bel Fuse, Inc. December 3, 2010 Output Filtering (continued) 110 100 90 80 70 60 50 40 30 20 10 0 Ripple(mVp-p) 1x10uF External Cap 1x47uF External Cap 2x47uF External cap 4x47uF External Cap 0.5 1.5 2.5 3.5 Output Voltage(Volts) 4.5 5.5 Note: Output ripple voltage for various output voltages with external 1x10 µF, 1x47 µF, 2x47 µF or 4x47 µF ceramic capacitors at the output (3A load). Input voltage is 12V. Safety Considerations For safety agency approval the power module must be installed in compliance with the spacing and separation requirements of the end-use safety agency standards, i.e., UL 60950-1, CSA C22.2 No. 60950-1-03, and VDE 0850:2001-12 (EN60950-1) Licensed. For the converter output to be considered meeting the requirements of safety extra-low voltage (SELV), the input must meet SELV requirements. The power module has extra-low voltage (ELV) outputs when all inputs are ELV. The input to these units is to be provided with a fast-acting fuse with a maximum rating of 5A in the positive input lead. Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 • Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com 13 NON-ISOLATED DC/DC CONVERTERS 4.5 Vdc - 14 Vdc Input, 0.59 Vdc - 5.5 Vdc /3 A Outputs Bel Power, Inc. , a subsidiary of Bel Fuse, Inc. December 3, 2010 Remote On/Off Parameter Signal Low (Unit On) Signal High (Unit Off) Signal Low (Unit Off) Signal High (Unit On) Active Low Active High Min -0.2 Typ - Max 0.6 Unit V 3.5 - Vin,max V -0.3 - 0.8 V 3.5 - Vin,max V Notes The remote on/off pin open, Unit on. The remote on/off pin open, Unit on. The SLIN-03E2Ax modules feature an On/Off pin for remote On/Off operation. Two On/Off logic options are available. In the Positive Logic On/Off option, the module turns ON during a logic High on the On/Off pin and turns OFF during a logic Low. With the Negative Logic On/Off option, the module turns OFF during logic High and ON during logic Low. The On/Off signal is always referenced to ground. For either On/Off logic option, leaving the On/Off pin disconnected will turn the module ON when input voltage is present. For positive logic modules, the circuit configuration for using the On/Off pin is shown in below figure. When the external transistor Q1 is in the OFF state, the internal PWM Enable signal is pulled high through an internal 1.5MΩ resistor and the external pullup resistor and the module is ON. When transistor Q1 is turned ON, the On/Off pin is pulled low and the module is OFF. A suggested value for Rpullup is 20kΩ. VIN+ MODULE Rpullup 1.5MEG I ON/OFF + ON/OFF 20K PWM Enable VON/OFF Q1 GND _ Circuit configuration for using positive On/Off logic For negative logic On/Off modules, the circuit configuration is shown below. The On/Off pin should be pulled high with an external pull-up resistor (suggested value for the 4.5V to 14V input range is 20Kohms). When transistor Q2 is in the OFF state, the On/Off pin is pulled high, transistor Q1 is turned ON and the module is OFF. To turn the module ON, Q2 is turned ON pulling the On/Off pin low, turning transistor Q1 OFF resulting in the PWM Enable pin going high. VIN+ MODULE Rpullup1 1.5MEG I ON/OFF ON/OFF + VON/OFF 22K Q2 GND 22K PWM Enable Q1 _ Circuit configuration for using negative On/Off logic Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 • Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com 14 NON-ISOLATED DC/DC CONVERTERS 4.5 Vdc - 14 Vdc Input, 0.59 Vdc - 5.5 Vdc /3 A Outputs Bel Power, Inc. , a subsidiary of Bel Fuse, Inc. December 3, 2010 Over Current Protection To provide protection in a fault (output overload) condition, the unit is equipped with internal current-limiting circuitry and can endure current limiting continuously. At the point of current-limit inception, the unit enters hiccup mode. The unit operates normally once the output current is brought back into its specified range. Over Temperature Protection To provide protection in a fault condition, the unit is equipped with a thermal shutdown circuit. The unit will shutdown if the over temperature threshold of 140°C is exceeded at the thermal reference point Tref. The thermal shutdown is not intended as a guarantee that the unit will survive temperatures beyond its rating. Once the unit goes into thermal shutdown it will then wait to cool before attempting to restart. Input Under-voltage Lockout At input voltages below the input under voltage lockout limit, the module operation is disabled. The module will begin to operate at an input voltage above the under voltage lockout turn-on threshold. Output Voltage Programming The output voltage of the SLIN-03E2Ax module can be programmed to any voltage from 0.59dc to 5.5Vdc by connecting a resistor between the Trim and GND pins of the module. Certain restrictions apply on the output voltage set point depending on the input voltage. These are shown in the Output Voltage vs. Input Voltage Set Point Area plot below. The Upper Limit curve shows that for output voltages of 0.9V and lower, the input voltage must be lower than the maximum of 14V. The Lower Limit curve shows that for output voltages of 3.8V and higher, the input voltage needs to be larger than the minimum of 4.5V. 16 Input Voltage (v) 14 12 Upper Limit 10 8 6 4 Lower Limit 2 0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5 5.5 6 Output Voltage (V) Output Voltage vs. Input Voltage Set Point Area plot showing limits where the output voltage can be set for different input voltages. Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 • Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com 15 NON-ISOLATED DC/DC CONVERTERS 4.5 Vdc - 14 Vdc Input, 0.59 Vdc - 5.5 Vdc /3 A Outputs Bel Power, Inc. , a subsidiary of Bel Fuse, Inc. December 3, 2010 Output Trim Equations Without an external resistor between Trim and GND pins, the output of the module will be 0.59Vdc. To calculate the value of the trim resistor, Rtrim, for a desired output voltage, use the following equation: ⎡ ⎤ 5.91 Rtrim = ⎢ kΩ ⎥ ⎣ (Vo − 0.591) ⎦ Rtrim is the external resistor in kΩ Vo is the desired output voltage. Table 1 provides Rtrim values required for some common output voltages. Table 1 VO, set (V) 0.6 1.0 1.2 1.5 1.8 2.5 3.3 5.0 Rtrim (KΩ) 656.7 14.45 9.704 6.502 4.888 3.096 2.182 1.340 By using a ±0.5% tolerance trim resistor with a TC of ±100ppm, a set point tolerance of ±1.5% can be achieved as specified in the electrical specification. Remote Sense The SLIN-03E2Ax modules have a Remote Sense feature to minimize the effects of distribution losses by regulating the voltage at the SENSE pin. The voltage between the SENSE pin and VOUT pin must not exceed 0.5V. Note that the output voltage of the module cannot exceed the specified maximum value. This includes the voltage drop between the SENSE and Vout pins. When the Remote Sense feature is not being used, connect the SENSE pin to the VOUT pin. Circuit configuration for programming output voltage using an external resistor Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 • Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com 16 NON-ISOLATED DC/DC CONVERTERS 4.5 Vdc - 14 Vdc Input, 0.59 Vdc - 5.5 Vdc /3 A Outputs Bel Power, Inc. , a subsidiary of Bel Fuse, Inc. December 3, 2010 Voltage Margining Output voltage margining can be implemented in the SLIN-03E2Ax modules by connecting a resistor, Rmargin-up, from the Trim pin to the ground pin for margining-up the output voltage and by connecting a resistor, Rmargin-down, from the Trim pin to output pin for margining-down. Vo Rmargin-down MODULE Q2 Trim Rmargin-up Rtrim Q1 GND Circuit Configuration for margining Output voltage Monotonic Start-up and Shutdown The SLIN-03E2Ax modules have monotonic start-up and shutdown behavior for any combination of rated input voltage, output current and operating temperature range. Startup into Pre-biased Output The SLIN-03E2Ax modules can start into a prebiased output as long as the prebias voltage is 0.5V less than the set output voltage. Power Good The SLIN-03E2Ax modules provide a Power Good (PGOOD) signal that is implemented with an open-drain output to indicate that the output voltage is within the regulation limits of the power module. The PGOOD signal will be de-asserted to a low state if any condition such as over temperature, over current or loss of regulation occurs that would result in the output voltage going ±10% outside the set-point value. The PGOOD terminal should be connected through a pull-up resistor (suggested value 100KΩ) to a source of 5VDC or lower. Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 • Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com 17 NON-ISOLATED DC/DC CONVERTERS 4.5 Vdc - 14 Vdc Input, 0.59 Vdc - 5.5 Vdc /3 A Outputs Bel Power, Inc. , a subsidiary of Bel Fuse, Inc. December 3, 2010 Tunable LoopTM The SLIN-03E2Ax modules have a new feature that optimizes transient response of the module called Tunable LoopTM. External capacitors are usually added to the output of the module for two reasons: to reduce output ripple and noise and to reduce output voltage deviations from the steady-state value in the presence of dynamic load current changes. Adding external capacitance however affects the voltage control loop of the module, typically causing the loop to slow down with sluggish response. Larger values of external capacitance could also cause the module to become unstable. The Tunable LoopTM allows the user to externally adjust the voltage control loop to match the filter network connected to the output of the module. The Tunable LoopTM is implemented by connecting a series R-C between the SENSE and TRIM pins of the module, as shown below. This R-C allows the user to externally adjust the voltage loop feedback compensation of the module. VOUT SENSE RTUNE MODULE CO CTUNE TRIM GND RTrim Circuit diagram showing connection of RTUNE and CTUNE to tune the control loop of the module Recommended values of RTUNE and CTUNE for different output capacitor combinations are given in below Tables 2 and 3. Table 2 shows the recommended values of RTUNE and CTUNE for different values of ceramic output capacitors up to 470uF that might be needed for an application to meet output ripple and noise requirements. Selecting RTUNE and CTUNE according to Table 2 will ensure stable operation of the module. In applications with tight output voltage limits in the presence of dynamic current loading, additional output capacitance will be required. Table 3 lists recommended values of RTUNE and CTUNE in order to meet 2% output voltage deviation limits for some common output voltages in the presence of a 1.5A to 3A step change (50% of full load), with an input voltage of 12V. Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 • Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com 18 NON-ISOLATED DC/DC CONVERTERS 4.5 Vdc - 14 Vdc Input, 0.59 Vdc - 5.5 Vdc /3 A Outputs Bel Power, Inc. , a subsidiary of Bel Fuse, Inc. December 3, 2010 Tunable LoopTM (continued) Table 2.General recommended values of RTUNE and CTUNE for Vin=12V and various external ceramic capacitor combinations. Co RTUNE CTUNE 1x47μF 270 2200pF 2x47μF 180 4700pF 4x47μF 100 18nF 6x47μF 75 18nF 10x47μF 75 22nF Table 3.Recommended values of RTUNE and CTUNE to obtain transient deviation of ≤2% of Vout for a 1.5A step load with Vin=12V. Vo 5V 3.3V 2.5V 1.8V 1.2V Co 1x22μF 1x47μF 2x47μF 2x47μF 3x47μF RTUNE CTUNE 270 820pF 100mV 270 2200pF 64mV 180 4700pF 37mV 150 4700pF 36mV 150 10nF 22mV ΔV 0.6V 1x47μF+330μF Polymer 100 15nF 12mV Thermal Considerations Power modules operate in a variety of thermal environments; however, sufficient cooling should always be provided to help ensure reliable operation. Considerations include ambient temperature, airflow, module power dissipation, and the need for increased reliability. A reduction in the operating temperature of the module will result in an increase in reliability. The thermal data presented here is based on physical measurements taken in a wind tunnel. 25.4_ (1.0) Wind Tunnel PWBs Power Module 76.2_ (3.0) x 12.7_ (0.50) Probe Location for measuring airflow and ambient temperature Air flow Thermal Test Setup Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 • Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com 19 NON-ISOLATED DC/DC CONVERTERS 4.5 Vdc - 14 Vdc Input, 0.59 Vdc - 5.5 Vdc /3 A Outputs Bel Power, Inc. , a subsidiary of Bel Fuse, Inc. December 3, 2010 Thermal Considerations (continued) The thermal reference points, Tref used in the specifications are also shown below. For reliable operation the temperatures at these points should not exceed 120oC. The output power of the module should not exceed the rated power of the module (Vo,set x Io,max). Preferred airflow direction and location of hot-spot of the module (Tref). Example Application Circuit Requirements: Vin: Vout: Iout: ΔVout: Vin, ripple 12V 1.8V 2.25A max., worst case load transient is from 1.5A to 2.25A 1.5% of Vout (27mV) for worst case load transient 1.5% of Vin (180mV, p-p) Vin+ VIN Vout+ VOUT SENSE RTUNE + CI2 MODULE CI1 CTUNE Q3 ON/OFF GND CI1 CI2 CO1 CTune RTune RTrim CO1 TRIM RTrim 10μF/16V ceramic capacitor (e.g. Murata GRM Series) 47μF/16V bulk electrolytic 2 x 47μF/6.3V ceramic capacitor (e.g. TDK C Series) 4.7nF ceramic capacitor (can be 1206, 0805 or 0603 size) 180 ohms SMT resistor (can be 1206, 0805 or 0603 size) 4.87kΩ SMT resistor (can be 1206, 0805 or 0603 size, recommended tolerance of 0.1%) Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 • Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com 20 NON-ISOLATED DC/DC CONVERTERS 4.5 Vdc - 14 Vdc Input, 0.59 Vdc - 5.5 Vdc /3 A Outputs Bel Power, Inc. , a subsidiary of Bel Fuse, Inc. December 3, 2010 Mechanical Outline PIN 7 PIN 8 PIN 1 2 3 4 5 6 7 8 9 10 FUNCTION ON/OFF VIN GND VOUT SENSE TRIM GND NC NC PGOOD Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 • Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com 21 NON-ISOLATED DC/DC CONVERTERS 4.5 Vdc - 14 Vdc Input, 0.59 Vdc - 5.5 Vdc /3 A Outputs Bel Power, Inc. , a subsidiary of Bel Fuse, Inc. December 3, 2010 Mechanical Outline (continued) Recommended Pad Layout PIN 8 PIN 7 Dimensions are in millimeters and (inches). Tolerances: x.x mm ± 0.5 mm (x.xx in. ± 0.02 in.) [unless otherwise indicated] x.xx mm ± 0.25 mm (x.xxx in ± 0.010 in.) Note: This module is recommended and compatible with Pb-Free Reflow Soldering and must be soldered using a reflow profile with a peak temperature of no more than 260ºC for less than 5 seconds. Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 • Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com 22 NON-ISOLATED DC/DC CONVERTERS 4.5 Vdc - 14 Vdc Input, 0.59 Vdc - 5.5 Vdc /3 A Outputs Bel Power, Inc. , a subsidiary of Bel Fuse, Inc. December 3, 2010 Packaging Details The SLIN-03E2Ax modules are supplied in tape & reel as standard. All Dimensions are in millimeters and (in inches). Reel Dimensions: Outside Dimensions: Inside Dimensions: Tape Width: 330.2 mm (13.00) 177.8 mm (7.00”) 24.00 mm (0.945”) Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 • Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com 23 NON-ISOLATED DC/DC CONVERTERS 4.5 Vdc - 14 Vdc Input, 0.59 Vdc - 5.5 Vdc /3 A Outputs Bel Power, Inc. , a subsidiary of Bel Fuse, Inc. December 3, 2010 Surface Mount Information Pick and Place The SLIN-03E2Ax modules use an open frame construction and are designed for a fully automated assembly process. The modules are fitted with a label designed to provide a large surface area for pick and place operations. The label meets all the requirements for surface mount processing, as well as safety standards, and is able to withstand reflow temperatures of up to 300oC. The label also carries product information such as part number and serial number. Nozzle Recommendations The module weight has been kept to a minimum by using open frame construction. Variables such as nozzle size, tip style, vacuum pressure and placement speed should be considered to optimize this process. The minimum recommended inside nozzle diameter for reliable operation is 3mm. The maximum nozzle outer diameter, which will safely fit within the allowable component spacing, is 7 mm. Lead Free Soldering The SLIN-03E2Ax modules are lead-free (Pb-free) and RoHS compliant and fully compatible in a Pb-free soldering process. Failure to observe the instructions below may result in the failure of or cause damage to the modules and can adversely affect long-term reliability. Pb-Free Reflow Profile Power Systems will comply with J-STD-020 Rev. C (Moisture/Reflow Sensitivity Classification for Nonhermetic Solid State Surface Mount Devices) for both Pb-free solder profiles and MSL classification procedures. This standard provides a recommended forced-air-convection reflow profile based on the volume and thickness of the package. The suggested Pb-free solder paste is Sn/Ag/Cu (SAC). The recommended linear reflow profile using Sn/Ag/Cu solder is shown in the figure below. Soldering outside of the recommended profile requires testing to verify results and performance. MSL Rating The SLIN-03E2Ax modules have a MSL rating of 2. Storage and Handling The recommended storage environment and handling procedures for moisture-sensitive surface mount packages is detailed in J-STD-033 Rev. A (Handling, Packing, Shipping and Use of Moisture/Reflow Sensitive Surface Mount Devices). Moisture barrier bags (MBB) with desiccant are required for MSL ratings of 2 or greater. These sealed packages should not be broken until time of use. Once the original package is broken, the floor life of the product at conditions of ≤ 30°C and 60% relative humidity varies according to the MSL rating (see J-STD-033A). The shelf life for dry packed SMT packages will be a minimum of 12 months from the bag seal date, when stored at the following conditions: < 40° C, < 90% relative humidity. 300 Per J-STD-020 Rev. C Peak Temp 260°C Reflow Temp (°C) 250 200 * Min. Time Above 235°C 15 Seconds Cooling Zone 150 Heating Zone 1°C/Second *Time Above 217°C 60 Seconds 100 50 0 Reflow Time (Seconds) Recommended linear reflow profile using Sn/Ag/Cu solder. Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 • Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com 24 NON-ISOLATED DC/DC CONVERTERS 4.5 Vdc - 14 Vdc Input, 0.59 Vdc - 5.5 Vdc /3 A Outputs Bel Power, Inc. , a subsidiary of Bel Fuse, Inc. December 3, 2010 Post Solder Cleaning and Drying Considerations Post solder cleaning is usually the final circuit-board assembly process prior to electrical board testing. The result of inadequate cleaning and drying can affect both the reliability of a power module and the testability of the finished circuit-board assembly. Revision History Date Revision Changes Detail 2009-6-10 A First release 2009-6-25 B Section “Surface Mount Information” added. Approval T. Bubriski TM T. Bubriski 2009-9-1 C Tunable Loop logo added. T. Bubriski 2009-10-8 D Updated Startup Time waveforms on page 10. T. Bubriski 2010-1-19 E Updated Remote ON/OFF table on page 14. T. Bubriski 2010-12-3 F Updated UVLO Turn-on and Turn-off Thresholds on page 2, Output Short-circuit Current on page 3, Derating Curves on page 6, and Example Application Circuit on page 21. T. Bubriski RoHS Compliance Complies with the European Directive 2002/95/EC, calling for the elimination of lead and other hazardous substances from electronic products. ©2009 Bel Fuse Inc. Specifications subject to change without notice 12/3/10 25 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