SLIN-03F1AL | DigiCamel IC Datasheet

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SLIN-03F1A BEL | Alldatasheet

Document overview

Manufacturer or author: Provided By ALLDATASHEET.COM(FREE DATASHEET DOWNLOAD SITE)
PDF pages: 27

Technical content

Features

Wide Input Voltage Range • Ability to Sink and Source Current
Fixed Switching Frequency • Cost Efficient Open Frame Design
Remote Sense • Over Temperature Protection
Remote On/Off • Output Over Current Protection
Tunable Loop TM(a registered trademark of Lineage Power Systems) to Optimize Dynamic output voltage response
Flexible output voltage sequencing
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 • Servers and storage applications
Intermediate bus voltage applications • Networking equipment
Telecommunications equipment • Industrial equipment

Description

The SLIN-03F1Ax power modules are non-isolated dc-dc conver ters that can deliver up to 3A of output current. These modules operate over a wide range of input voltage (V IN=2.4Vdc-5.5Vdc) and provide a precisely regulated output voltage from 0.6Vdc to 3.63Vdc, progra mmable via an external resistor. Features include remote On/Off, adjustable output voltage, over current and over temperature protection, and output voltage sequencing. A new feature, the Tunable Loop TM, allows the user to optimize the dynamic response of the converter to match the load with reduced amount of out put capacitance leading to savings on cost and PWB area. Part Selection Output Voltage Input Voltage Max. Output Current Typical Efficiency Model Number Active High Model Number Active Low 0.6 Vdc - 3.63 Vdc 2.4 Vdc - 5.5 Vdc 3 A 91% SLIN-03F1A0 SLIN-03F1AL Notes: Add “G” suffix at the end of the model number to indicate Tray Packaging. Part Number Explanation S LIN – 03 F 1A 0 1 2 3 4 5 6 1---Surface mount 4--- Wide input voltage range (2.4-5.5V) 2---Series code 5--- Wide output voltage range (0.6-3.63V) 3---Output current (3A) 6--- Enable, active high, change “0” to “L” means active low SLIN-03F1Ax RoHS Compliant Rev.B

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 2.4 Vdc - 5.5 Vdc Input, 0.6 Vdc - 3.63 Vdc /3 A Outputs December 9, 2010 Bel Power, Inc. , a subsidiary of Bel Fuse, Inc. Absolute Maximum Ratings Parameter Min Typ Max Unit Notes Continuous Input Voltage -0.3 - 6 V Sequencing Voltage -0.3 - Vin V Operating Ambient Temperature -40 - 85 °C Storage Temperature -55 - 125 °C 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 operati ons sections of the data sheet. Exposure to absolute maximum ratings for extended periods can adversely affect the device reliability. Input Specifications Parameter Min Typ Max Unit Notes Operating Input Voltage 2.4 - 5.5 V Input Current (full load) - - 3.5 A V IN=2.4V to 5.5V Input Current (no load) Vo=0.6V Vo=3.3V mA mA VIN=5.0V, module enabled Input Stand-by Current - 2.1 - mA V IN = 5.0Vdc, module disabled Input Reflected Ripple Current (pk-pk) - 25 - mA 5Hz to 20MHz, 1μH source impedance; VIN =0 to 5.5V, IO= IOmax ; See Test Configurations I2t Inrush Current Transient - - 1 A 2s Input Ripple Rejection (120Hz) - 40 - dB Turn-on Threshold - - 2.2 V Turn-off Threshold 1.75 - - V Hysteresis 0.08 - 0.2 V 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 po wer architecture. To pres erve maximum flexibility, internal fusing is not included; however, to achieve maximum safety and sy stem protection, always use an input line fuse. The safety agencies require a fast-acting fuse with a maximu m rating of 5A. Based on the information provided in this data sheet on inrush energy and maximum dc input curr ent, 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 3 NON-ISOLATED DC/DC CONVERTERS 2.4 Vdc - 5.5 Vdc Input, 0.6 Vdc - 3.63 Vdc /3 A Outputs December 9, 2010 Bel Power, Inc. , a subsidiary of Bel Fuse, Inc. Output Specifications Parameter Min Typ Max Unit Notes Output Voltage Set Point -1 .5 - +1.5 %Vo,set with 0.5% tolerance for external resistor used to set output voltage Output Voltage -3.0 - +3.0 %Vo,set Over all operating input voltage, resistive load, and temperature conditions until end of life Adjustment Range1 0.6 - 3.63 V selected by an external resistor Remote Sense Range - - 0.5 V Load Regulation VO ≥ 2.5V VO < 2.5V mV mV IO=IO, min to IO, max Line Regulation VO ≥ 2.5V VO < 2.5V 0.4 %Vo,set mV VIN=VIN, min to VIN, max Temperature Regulation (-40°C to +85°C) - - 0.4 %Vo,set Ripple and Noise (pk-pk) - 20 35 mV Ripple and Noise (rms) - 15 25 mV 5Hz to 20MHz BW, VIN=VIN, nom and IO=IO, min to IO, max Co = 0.1μF // 10 μF ceramic capacitors) Output Current Range 0 - 3 A Output DC Current Limit - - 200 %Io,max Hiccup Mode Output Short-Circuit Current - 0.12 - A Vo ≤250mV, Hiccup Mode Output Capacitance1 ESR≥ 1 mΩ ESR≥0.15 mΩ ESR≥ 10 mΩ 1000 3000 uF uF uF Without the Tunable LoopTM With the Tunable LoopTM With the Tunable LoopTM - 2 - mS 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) Turn-On Delay Time - 2 - mS 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) Output voltage Rise time - 5 - mS time for Vo to rise from10% 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 Dynamic Load Response Peak Deviation - 90 - mV △V0%~50% of Max Load Settling Time - 20 - uS Peak Deviation - 100 - mV △V50%~0% of Max Load Settling Time - 20 - uS di/dt=10A/us, Vin=5V, Vo=1.5V, Ta=25°C, Co=0 Notes: 1. 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). 2. 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 2.4 Vdc - 5.5 Vdc Input, 0.6 Vdc - 3.63 Vdc /3 A Outputs December 9, 2010 Bel Power, Inc. , a subsidiary of Bel Fuse, Inc. General Specifications Parameter Min Typ Max Unit Notes Efficiency Vo=0.6V Vo=1.2V Vo=1.8V Vo=2.5V Vo=3.3V 81.2 89.4 91.4 93.9 94.4 Vin= 3.3Vdc, Ta=25°C Io=Io, max , Vo= Vo,set. When Vo=3.3V, Vin=5.0V Switching Frequency - 600 - kHz Over Temperature Protection - 140 - °C Sequencing Delay time 10 - - msec Delay from VIN, min to application of voltage on SEQ pin Tracking Accuracy Power-Up: 2V/ms Power-Down: 2V/ms 100 100 mV mV Vin, min to Vin, max; Io, min to Io, max, Vseq < Vo Weight - 1.55 - g MTBF 16,139,760 hours Calculated Per Bell Core SR-332 (Io=0.8Io, max, Ta=40°C, Telecordia Issue 2 Method 1 Case Dimensions Inches (L × W × H) Millimeters (L × W × H) 0.48 x 0.48 x 0.246 12.19 x 12.19 x 6.25 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 5 NON-ISOLATED DC/DC CONVERTERS 2.4 Vdc - 5.5 Vdc Input, 0.6 Vdc - 3.63 Vdc /3 A Outputs December 9, 2010 Bel Power, Inc. , a subsidiary of Bel Fuse, Inc. Efficiency Data 00 . 511 . 522 . 53 Vin=5.5V Vin=2.4V Vin=3.3V 0 0.5 1 1.5 2 2.5 3 Vin=5.5V Vin=2.4V Vin=3.3V EFFICIENCY, η (%) OUTPUT CURRENT, IO (A) EFFICIENCY, η (%) OUTPUT CURRENT, IO (A) Vo=0.6V Vo=1.2V 00 . 511 . 522 . 53 Vin=5.5V Vin=2.4V Vin=3.3V 100 00 . 511 . 522 . 53 Vin=5.5V Vin=3V Vin=3.3V EFFICIENCY, η (%)) OUTPUT CURRENT, IO (A) EFFICIENCY, η (%) OUTPUT CURRENT, IO (A) Vo=1.8V Vo=2.5V 100 00 . 511 . 522 . 53 Vin=5.5V Vin=4V Vin=5V EFFICIENCY, η (%)) OUTPUT CURRENT, IO (A) 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 6 NON-ISOLATED DC/DC CONVERTERS 2.4 Vdc - 5.5 Vdc Input, 0.6 Vdc - 3.63 Vdc /3 A Outputs December 9, 2010 Bel Power, Inc. , a subsidiary of Bel Fuse, Inc. Thermal Derating Curves 0.5 1. 5 2.5 3.5 20 30 40 50 60 70 80 90

0 LFM

0.5 1. 5 2.5 3.5 20 30 40 50 60 70 80 90 OUTPUT CURRENT, Io (A) AMBIENT TEMPERATURE, TA OC OUTPUT CURRENT, Io (A) AMBIENT TEMPERATURE, TA OC Vo=0.6V Vo=1.2V 0.5 1. 5 2.5 3.5 20 30 40 50 60 70 80 90 0.5 1. 5 2.5 3.5 20 30 40 50 60 70 80 90 OUTPUT CURRENT, Io (A) AMBIENT TEMPERATURE, TA OC OUTPUT CURRENT, Io (A) AMBIENT TEMPERATURE, TA OC Vo=1.8V Vo=2.5V 0.5 1. 5 2.5 3.5 20 30 40 50 60 70 80 90 OUTPUT CURRENT, Io (A) AMBIENT TEMPERATURE, TA OC 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 7 NON-ISOLATED DC/DC CONVERTERS 2.4 Vdc - 5.5 Vdc Input, 0.6 Vdc - 3.63 Vdc /3 A Outputs December 9, 2010 Bel Power, Inc. , a subsidiary of Bel Fuse, Inc. Ripple and Noise Waveforms OUTPUT VOLTAGE VO (V) (20mV/div) TIME, t (1μs/div) OUTPUT VOLTAGE VO (V) (20mV/div) TIME, t (1μs/div) Vin=5V, Vo=0.6V, Io = Io,max Vin=5V, Vo=1.2V, Io = Io,max OUTPUT VOLTAGE VO (V) (20mV/div) TIME, t (1μs/div) OUTPUT VOLTAGE VO (V) (20mV/div) TIME, t (1μs/div) Vin=5V, Vo=1.8V, Io = Io,max Vin=5V, Vo=2.5V, Io = Io,max OUTPUT VOLTAGE VO (V) (20mV/div) TIME, t (1μs/div) Vin=5V, Vo=3.3V, 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 8 NON-ISOLATED DC/DC CONVERTERS 2.4 Vdc - 5.5 Vdc Input, 0.6 Vdc - 3.63 Vdc /3 A Outputs December 9, 2010 Bel Power, Inc. , a subsidiary of Bel Fuse, Inc. Transient Response Waveforms OUTPUT CURRENT, OUTPUT VOLTAGE IO (A) (1A/div) VO (V) (100mV/div) TIME, t (20μs /div) OUTPUT CURRENT, OUTPUT VOLTAGE IO (A) (1A/div) VO (V) (100mV/div) TIME, t (20μs /div) Transient Response to Dynamic Load Change from 0% to 50% to 0%. Vin=5V, Vo=0.6V Transient Response to Dynamic Load Change from 0% to 50% to 0%. Vin=5V, Vo=1.2V OUTPUT CURRENT, OUTPUT VOLTAGE IO (A) (1A/div) VO (V) (200mV/div) TIME, t (20μs /div) OUTPUT CURRENT, OUTPUT VOLTAGE IO (A) (1A/div) VO (V) (200mV/div) TIME, t (20μs /div) Transient Response to Dynamic Load Change from 0% to 50% to 0%. Vin=5V, Vo=1.8V Transient Response to Dynamic Load Change from 0% to 50% to 0%. Vin=5V, Vo=2.5V OUTPUT CURRENT, OUTPUT VOLTAGE IO (A) (1A/div) VO (V) (200mV/div) TIME, t (20μs /div) Transient Response to Dynamic Load Change from 0% to 50% to 0%. Vin=5V, 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 9 NON-ISOLATED DC/DC CONVERTERS 2.4 Vdc - 5.5 Vdc Input, 0.6 Vdc - 3.63 Vdc /3 A Outputs December 9, 2010 Bel Power, Inc. , a subsidiary of Bel Fuse, Inc. Startup Time ON/OFF VOLTAGE OUTPUT VOLTAGE VON/OFF (V) (2V/div) VO (V) (200mV/div) TIME, t (1 ms/div) ON/OFF VOLTAGE OUTPUT VOLTAGE VON/OFF (V) (2V/div) VO (V) (500mV/div) TIME, t (1 ms/div) Start-up Using On/Off Voltage (Io = Io,max), Vo=0.6V Start-up Using On/Off Voltage (I o = Io,max), Vo=1.2V ON/OFF VOLTAGE OUTPUT VOLTAGE VON/OFF (V) (2V/div) VO (V) (500mV/div) TIME, t (1 ms/div) ON/OFF VOLTAGE OUTPUT VOLTAGE VON/OFF (V) (2V/div) VO (V) (1V/div) TIME, t (1 ms/div) Start-up Using On/Off Voltage (Io = Io,max), Vo=1.8V Start-up Using On/Off Voltage (I o = Io,max), Vo=2.5V ON/OFF VOLTAGE OUTPUT VOLTAGE VON/OFF (V) (2V/div) VO (V) (1V/div) TIME, t (1 ms/div) Start-up Using On/Off Voltage (Io = Io,max), 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 2.4 Vdc - 5.5 Vdc Input, 0.6 Vdc - 3.63 Vdc /3 A Outputs December 9, 2010 Bel Power, Inc. , a subsidiary of Bel Fuse, Inc. Startup Time (continued) INPUT VOLTAGE OUTPUT VOLTAGE VIN (V) (2V/div) VO (V) (200mV/div) TIME, t (2 ms/div) INPUT VOLTAGE OUTPUT VOLTAGE VIN (V) (2V/div) VO (V) (500mV/div) TIME, t (1 ms/div) Start-up Using Input Voltage (VIN = 5V, Io = Io,max ), Vo=0.6V Start-up Using Input Voltage (VIN = 5V, Io = Io,max ), Vo=1.2V INPUT VOLTAGE OUTPUT VOLTAGE VIN (V) (2V/div) VO (V) (1V/div) TIME, t (1 ms/div) INPUT VOLTAGE OUTPUT VOLTAGE VIN (V) (2V/div) VO (V) (1V/div) TIME, t (1 ms/div) Start-up Using Input Voltage (VIN = 5V, Io = Io,max ), Vo=1.8V Start-up Using Input Voltage (VIN = 5V, Io = Io,max ), Vo=2.5V INPUT VOLTAGE OUTPUT VOLTAGE VIN (V) (2V/div) VO (V) (1V/div) TIME, t (1 ms/div) Start-up Using Input Voltage (VIN = 5V, Io = Io,max ), 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 2.4 Vdc - 5.5 Vdc Input, 0.6 Vdc - 3.63 Vdc /3 A Outputs December 9, 2010 Bel Power, Inc. , a subsidiary of Bel Fuse, Inc. Test Configurations Input Reflected Ripple Current Test Setup. TO OSCILLOSCOPE CURRENT PROBE LTEST 1μH BATTERY CS 1000μF Electrolytic E.S.R.<0.1Ω @ 20°C 100kHz 2x100μF Tantalum VIN(+) 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. CIN Output Ripple and Noise Test Setup 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+ COM 0.1uF RESISTIVE LOAD SCOPE USING BNC SOCKET COPPER STRIP GROUND PLANE 10uF Output Voltage and Efficiency Test Setup VO COM VIN(+) COM RLOAD Rcontact Rdistribution Rcontact RdistributionRcontact Rcontact Rdistribution Rdistribution VIN VO 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. η = VO. IO VIN. IIN x 100 % Efficiency

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, 0.6 Vdc - 3.63 Vdc /3 A Outputs December 9, 2010 Bel Power, Inc. , a subsidiary of Bel Fuse, Inc. Input Filtering The SLIN-03F1Ax module should be connected to a low ac -impedance source. A highly inductive source can affect the stability of the module. Input capacitance mu st 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. Figure A shows the input ripple voltage for various output voltages at 3A of load current with 1x22µF or 2x22µF ceramic capacitors and an input of 5V. Figure B shows data for the 3.3Vin case, with 1x22µF or 2x22µF of ceramic capacitors at the input. Input Ripple Voltage (mVp-p) 0 . 51 1 . 522 . 533 . 5 1x22uF 2x22uF Input Ripple Voltage (mVp-p) 0 0 . 511 . 522 . 53 1x22uF 2x22uF Output Voltage (Vdc) Figure A Output Voltage (Vdc) Figure B Output Filtering The SLIN-03F1Ax 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 fo r a number of reasons. First, there may be a need to further reduce the output ripple and no ise of the module. Second, the dy namic response characteristics may need to be customized to a particular load step change. To reduce the output ripple and improve the dynamic resp onse 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. Figure A on the next page provides output ripple information for different external capacitance values at various Vo and for a load current of 3A while maintaining an input voltage of 5V. Figure B shows the performance with a 3.3V input. For stable operat ion of the module, limit the capacitance to less than the maximum output capacitance as specified in the electr ical specification table. Optimal performance of the module can be achieved by using the Tunable Loop TM 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 NON-ISOLATED DC/DC CONVERTERS 2.4 Vdc - 5.5 Vdc Input, 0.6 Vdc - 3.63 Vdc /3 A Outputs December 9, 2010 Bel Power, Inc. , a subsidiary of Bel Fuse, Inc. Output Filtering (continued) 0 . 511 . 522 . 533 . 5 Output Voltage(Volts) Ripple(mVp-p) 1x10uF External Cap 1x47uF External cap 2x47uF External Cap 4x47uF external Cap 0 . 511 . 522 . 53 Output Voltage(Volts) Ripple(mVp-p) 1x10uF External Cap 1x47uF External cap 2x47uF External Cap 4x47uF external Cap Figure A Output ripple voltage for various output Figure B Output ripple voltage for various output voltage at Vin=5V, 3A load voltage at Vin=3.3V, 3A load Safety Considerations For safety agency approval the power module must be inst alled 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 modul e has extra-low voltage (E LV) outputs when all inputs are ELV. The input to these units is to be provided with a fast-act ing 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 NON-ISOLATED DC/DC CONVERTERS 2.4 Vdc - 5.5 Vdc Input, 0.6 Vdc - 3.63 Vdc /3 A Outputs December 9, 2010 Bel Power, Inc. , a subsidiary of Bel Fuse, Inc. Remote On/Off Parameter Min Typ Max Unit Notes Signal Low (Unit On) -0.2 - Vin-1.6 V Signal High (Unit Off) Active Low Vin-0.8 - Vin,max V The remote on/off pin open, Unit on. Signal Low (Unit Off) -0.3 - 0.3 V Signal High (Unit On) Active High 1.2 - Vin,max V The remote on/off pin open, Unit on. The SLIN-03F1Ax modules feature an On/Off pin for remo te On/Off operation. Two On/Off logic options are available. In the Positive Logic On/Off option, the m odule 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 the figure below. When the external transistor Q1 is in the OFF state, Q2 is ON, the internal PWM Enable signal is pulled low and the module is ON. When transistor Q1 is turned ON, the On/Off pin is pulled low, Q2 is turned off and the internal PWM Enable signal is pulled high through the 100K internal pull-up resistor and the module is OFF. 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 2.4V to 5.5V input range is 3.6Kohms). When transistor Q1 is in the OFF state, the On/Off pin is pulled high and the module is OFF. The On/Off threshold for logic High on the On/Off pin depends on the input voltage and its minimum value is VIN – 1.6V. To turn the module ON, Q1 is turned ON pulling the On/Off pin low. 100K GND PWM Enable ON/OFF VIN+ ON/OFF V I MODULE Rpullup ON/OFF 2.05K 20K Circuit configuration for using negative On/Off logic 100K GND PWM Enable ON/OFF VIN+ ON/OFF I V MODULE ON/OFF 20K 20K

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, 0.6 Vdc - 3.63 Vdc /3 A Outputs December 9, 2010 Bel Power, Inc. , a subsidiary of Bel Fuse, Inc. Over Current Protection To provide protection in a fault (output overload) condi tion, the unit is equipped with internal current-limiting circuitry and can endure current limiting continuously. At the point of curre nt-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 t he 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 lim it, 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-03F1Ax module can be pr ogrammed to any voltage from 0.6dc to 3.63Vdc 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 ar e shown in the Output Voltage vs. Input Voltage Set Point Area plot below. The Upper Limit curve shows t hat the entire output voltage range is available with the maximum input voltage of 5.5V. The Lower Limit curve sh ows that for output voltages of 1.8V and higher, the input voltage needs to be larger than the minimum of 2.4V. 0 . 511 . 522 . 533 . 54 Output Voltage (V) Input Voltage (v) Upper Limit Lower Limit 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 NON-ISOLATED DC/DC CONVERTERS 2.4 Vdc - 5.5 Vdc Input, 0.6 Vdc - 3.63 Vdc /3 A Outputs December 9, 2010 Bel Power, Inc. , a subsidiary of Bel Fuse, Inc. Output Trim Equations Without an external resistor between Trim and GND pins, the output of the module will be 0.6Vdc. To calculate the value of the trim resistor, Rtrim, for a desired output voltage, use the following equation: () Ω⎥⎦ −= kVoRtrim 6.0 2.1 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) Rtrim (KΩ)

0.6 Open

1.0 3.0 1.2 2.0 1.5 1.333 1.8 1.0 2.5 0.632 3.3 0.444 By using a ±0.5% tolerance trim resistor with a TC of ±25ppm, a set point tolerance of ±1.5% can be achieved as specified in the electrical specification. Circuit configuration for programming output voltage using an external resistor Remote Sense The SLIN-03F1Ax 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.

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, 0.6 Vdc - 3.63 Vdc /3 A Outputs December 9, 2010 Bel Power, Inc. , a subsidiary of Bel Fuse, Inc. Voltage Margining Output voltage margining can be implemented in the SLIN-03F1Ax modules by connecting a resistor, R margin-up, from the Trim pin to the ground pin for margining- up the output voltage and by connecting a resistor, R margin-down, from the Trim pin to output pin for margining-down. Vo MODULE GND Trim Rtrim Rmargin-up Rmargin-down Circuit Configuration for margining Output voltage Monotonic Start-up and Shutdown The SLIN-03F1Ax modules have monotonic start-up and s hutdown behavior for any combination of rated input voltage, output current and operating temperature range. Startup into Pre-biased Output The SLIN-03F1Ax modules can start into a prebiased output as long as the prebias voltage is 0.5V less than the set output voltage. Note that prebias operation is not supported when output voltage sequencing is used. Output Voltage Sequencing The SLIN-03F1Ax 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 not using the sequencing feature, either tie the SEQ pin to VIN or leave it unconnected. When an analog voltage is applied to the SEQ pin, the output voltage tracks this voltage until the output reaches the set-point voltage. The final value of the SEQ volt age must be set higher than the set-point voltage of the module. The output voltage follows the voltage on the SEQ pin on a one-to-one volt basis. By connecting the SEQ pins of multiple modules together, all modules c an track their output voltages to the voltage applied on the SEQ pin. For proper voltage sequencing, first, input voltage is applie d to the module. The On/Off pin of the module is left unconnected (or tied to GND for negative logic modules or tied to VIN for positive logic modules) so that the module is ON by default.

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, 0.6 Vdc - 3.63 Vdc /3 A Outputs December 9, 2010 Bel Power, Inc. , a subsidiary of Bel Fuse, Inc. Output Voltage Sequencing (continued) After applying input voltage to the module, a minimu m 10msec delay is required before applying voltage on the SEQ pin. This delay gives the module enough time to comple te its internal power-up soft-start cycle. During the delay time, the SEQ pin should be held close to ground (n ominally 50mV ± 20 mV). This is required to keep the internal op-amp out of saturation thus preventing output overshoot during the start of the sequencing ramp. By selecting resistor R1 (see figure below) according to the following equation 05.0 249501 −= INVR the voltage at the sequencing pin will be 50mV when the sequencing signal is at zero. GND VIN+ SEQ OUT 10K 499K MODULE Circuit showing connection of the sequencing signal to the SEQ pin After the 10msec delay, an analog voltage is applied to t he SEQ pin and the output voltage of the module will track this voltage on a one-to-one volt basis until the output reaches the set-point voltage. To initiate simultaneous shutdown of the modules, the SEQ pin vo ltage is lowered in a controlled manner. The output voltage of the modules tracks the voltages below their se t-point voltages on a one-to-one basis. A valid input voltage must be maintained until the tracking and output voltages reach ground potential. When using the sequencing feature to control start-up of the module, pre-bias immunity during start-up is disabled. The pre-bias immunity feature of the module relies on the m odule being in the diode-mode during start-up. When using the sequencing feature, modules goes through an internal set-up time of 10msec, and will be in synchronous rectification mode when the voltage at t he SEQ pin is applied. This will result in the module sinking current if a pre-bias voltage is present at the output of the module. When pre-bias immunity during start- up is required, the sequencing featur e must be disabled. For additional guidelines on using the sequencing feature please contact the Bel Power technical representative for additional information. ohms

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, 0.6 Vdc - 3.63 Vdc /3 A Outputs December 9, 2010 Bel Power, Inc. , a subsidiary of Bel Fuse, Inc. Tunable LoopTM The SLIN-03F1Ax modules have a new feature that optim izes transient response of the module called Tunable LoopTM. External capacitors are usually added to the output of t he module for two reasons: to reduce output ripple and noise and to reduce output voltage deviations from the st eady-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 Loop TM allows the user to externally adjust the vo ltage control loop to match the filter network connected to the output of the module. The Tunable Loop TM 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. MODULE VOUT SENSE TRIM GND RTUNE CTUNE RTrim C O 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 Tables 2, 3, 4 and 5. Tables 2 and 4 show the recommended values of R TUNE 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 for 5Vin and 3.3Vin respectively. Selecting R TUNE 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. Tables 3 and 5 list recommended values of R TUNE 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 5Vin and 3.3Vin respectively. Please contact your Bel Power technical representative to obtain more details of this feature as well as for guidelines on how to select the right value of external R-C to tune the module for best transient performance and stable operation for other output capacitance values or input voltages other than 3.3 or 5V.

December 9, 2010 Bel Power, Inc. , a subsidiary of Bel Fuse, Inc. Table 4. General recommended values of RTUNE and CTUNE for Vin=3.3V and various external ceramic capacitor Table 5. Recommended values of RTUNE and CTUNE to obtain transient deviation of ≤2% of Vout for a 1.5A step

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, 0.6 Vdc - 3.63 Vdc /3 A Outputs December 9, 2010 Bel Power, Inc. , a subsidiary of Bel Fuse, Inc. Thermal Considerations Power modules operate in a variety of thermal environm ents; 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 t he operating temperature of t he module will result in an increase in reliability. The thermal data presented here is based on physical measurements taken in a wind tunnel. Air flow x Power Module Wind Tunnel PWBs 12.7_ (0.50) 76.2_ (3.0) Probe Location for measuring airflow and ambient temperature 25.4_ (1.0) Thermal Test Setup The thermal reference point, T ref, used in the specifications is also shown below. For reliable operation the temperatures at this point should not exceed 125 oC. 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).

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, 0.6 Vdc - 3.63 Vdc /3 A Outputs December 9, 2010 Bel Power, Inc. , a subsidiary of Bel Fuse, Inc. Example Application Circuit Requirements: Vin: 3.3V Vout: 1.8V Iout: 2.25A max., worst case load transient is from 1.5A to 2.25A ΔVout: 1.5% of Vout (27mV) for worst case load transient Vin, ripple 1.5% of Vin (50mV, p-p) MODULE VOU T SENSE GND TRIM RTUNE CTUNE RTrim VI N CO1 CI2 CI1 Vin+ Vout+ ON/OFFQ3 CI1 22 μF/6.3V ceramic capacitor CI2 47 μF/6.3V bulk electrolytic CO1 2 x 47 μF/6.3V ceramic capacitor (e.g. Murata GRM31CR60J476ME19) CTune 27nF ceramic capacitor (can be 1206, 0805 or 0603 size) RTune 33 ohms SMT resistor (can be 1206, 0805 or 0603 size) RTrim 1k Ω 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 NON-ISOLATED DC/DC CONVERTERS 2.4 Vdc - 5.5 Vdc Input, 0.6 Vdc - 3.63 Vdc /3 A Outputs December 9, 2010 Bel Power, Inc. , a subsidiary of Bel Fuse, Inc. Mechanical Outline PIN FUNCTION

1 ON/OFF

2 VIN

3 GND

4 VOUT

5 SENSE

6 TRIM

7 GND

9 SEQ

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, 0.6 Vdc - 3.63 Vdc /3 A Outputs December 9, 2010 Bel Power, Inc. , a subsidiary of Bel Fuse, Inc. Mechanical Outline (continued) Recommended Pad Layout Dimensions are in millimeters and (inches). 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. PIN 8 PIN 7 PIN 10

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, 0.6 Vdc - 3.63 Vdc /3 A Outputs December 9, 2010 Bel Power, Inc. , a subsidiary of Bel Fuse, Inc. Packaging Details The SLIN-03F1Ax modules are supplied in tape & reel as standard. All Dimensions are in millimeters and (in inches). Reel Dimensions: Outside Dimensions: 330.2 mm (13.00) Inside Dimensions: 177.8 mm (7.00”) Tape Width: 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 NON-ISOLATED DC/DC CONVERTERS 2.4 Vdc - 5.5 Vdc Input, 0.6 Vdc - 3.63 Vdc /3 A Outputs December 9, 2010 Bel Power, Inc. , a subsidiary of Bel Fuse, Inc. Surface Mount Information Pick and Place The SLIN-03F1Ax 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 usi ng 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 re liable 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-03F1Ax modules are lead-free (Pb-free) and Ro HS compliant and fully compatible in a Pb-free soldering process. Failure to observe the instructions bel ow 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 (Moist ure/Reflow Sensitivity Classification for Nonhermetic Solid State Surface Mount Devices) for both Pb-free sold er profiles and MSL classification procedures. This standard provides a recommended forced-air-convection re flow profile based on the volume and thickness of the package (table 4-2). The suggested Pb-free solder paste is Sn/Ag/Cu (SAC). The recommended linear reflow profile using Sn/Ag/Cu solder is shown in t he figure below. Soldering outside of the recommended profile requires testing to verify results and performance. MSL Rating The SLIN-03F1Ax 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, Pa cking, 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 ti me 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 s helf life for dry packed SMT pa ckages will be a minimum of 12 months from the bag seal date, when stored at the following conditions: < 40° C, < 90% relative humidity. Per J-STD-020 Rev. C 100 150 200 250 300 Reflow Time (Seconds) Reflow Temp (°C) Heating Zone 1°C/Second Peak Temp 260°C * Min. Time Above 235°C

15 Seconds

*Time Above 217°C

60 Seconds

Recommended linear reflow profile using Sn/Ag/Cu solder.

206 Van Vorst Street 8F/ 8 Luk Hop Street Preston Technology Management Centre

Jersey City, NJ 07302 San Po Kong Marsh Lane, Suite G7, Preston Tel 201-432-0463 Kowloon, Hong Kong Lancashire, PR1 8UD, U.K. Fax 201-432-9542 Tel 852-2328-5515 Tel 44-1772-556601 www.belfuse.com Fax 852-2352-3706 Fax 44-1772-888366 www.belfuse.com www.belfuse.com NON-ISOLATED DC/DC CONVERTERS 2.4 Vdc - 5.5 Vdc Input, 0.6 Vdc - 3.63 Vdc /3 A Outputs December 9, 2010 Bel Power, Inc. , a subsidiary of Bel Fuse, Inc. 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 Approval 2009-10-12 A First release. T. Bubriski 2010-12-9 B Updated Figure A on page 13. 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.

Product Information

SLIN-03F1AL specifications and overview.

Summary

NON-ISOLATED DC/DC CONVERTERS

Description

NON-ISOLATED DC/DC CONVERTERS

Source title SLIN-03F1AL Datasheet(PDF) - Bel Fuse Inc.

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