View SLIN-03F2A_1089602.PDF datasheet online --- IC-ON-LINE

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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 2.4 vdc - 5.5 vdc input, 0.6 vdc - 3.63 vdc /3 a output december 10, 2010 bel power inc., a subsid iary of bel fuse inc. features ? wide input voltage range ? over temperature protection ? output voltage programmable ? output over current protection ? fixed switching frequency ? ability to sink and source current ? remote on/off ? cost efficient open frame design ? remote sense ? tunable loop tm (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 ? ul * 60950-1 recognized, 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-03F2Ax 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, programm able via an external resistor. features include remote on/off, adjustable output volta ge, over current protection, and over temperature protection. a new feature, the tunable loop tm , allows the user to optimize the dynamic re sponse of the converter to match the load with reduced amount of output capacitance le ading 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-03F2A0 SLIN-03F2Al notes: add ?g? suffix at the end of the model number to indicate tray packaging. part number explanation s lin ? 03 f 2a 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 volt age range (0.6-3.63v) 3---output current (3a) 6--- enable, active high, change ?0? to ?l? means active low SLIN-03F2Ax rohs com p liant 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 output december 10, 2010 bel power inc., a subsid iary of bel fuse inc. absolute maximum ratings parameter min typ max unit notes continuous input voltage -0.3 - 6 v operating ambient tem perature -40 - 85 c storage temperature -55 - 125 c note: stresses in excess of the absolute maximum rating s can cause permanent dama ge to the device. these are absolute stress ratings only, functional operati on of the device is not implied at these or any other conditions in excess of those given in the operatio ns sections of the data sheet. exposure to absolute maximum ratings for extended periods can adv ersely affect the device reliability. input specifications parameter min typ max unit notes operating input vo ltage 2.4 - 5.5 v input current (full load) - - 3.5 a v in =2.4v to 5.5v, i o =i o, max - 26 - ma v in =5.0v, vo=0.6v, i o =0, module enabled input current (no load) - 75 - ma v in =5.0v, vo=3.3v, i o =0, module enabled input stand-by current - 2.1 - ma v in = 5v, module disabled input reflected ripple current (pk-pk) - 25 - ma 5hz to 20mhz, 1 h source impedance; v in =0 to 5.5v , i o = i omax i 2 t inrush current transient - - 1 a 2 s 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 appl ications, 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 rati ng of 5a. based on the inform ation 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 da ta 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 output december 10, 2010 bel power inc., a subsid iary 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 conditio ns until end of life adjustment range 0.6 - 3.63 v selected by an external resistor remote sense range - - 0.5 v - - 0.4 %vo,set line regulation, v in =v in, min to v in, max output regulation (for v o 2.5vdc) - - 10 mv load regulation, i o =i o, min to i o, max - - 10 mv line regulation, v in =v in, min to v in, max output regulation (for v o < 2.5vdc) - - 5 mv load regulation, i o =i o, min to i o, max temperature regulation - - 0.4 %vo,set t ref =t a, min to t a, max ripple and noise (pk-pk) - 20 35 mv ripple and noise (rms) - 15 25 mv 5hz to 20mhz bw, v in =v in, nom and i o =i o, min to i o, max , co = 0.1 f // 10 f 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 capacitance esr 1 m ? esr 0.15 m ? esr 10 m ? 0 0 0 - - - 47 1000 3000 uf uf uf without the tunable loop tm with the tunable loop tm with the tunable loop tm - 2 - ms case 1: on/off input is enabled and then input power is applied (delay from instant at which v in = v in, 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 from 10% of vo, set to 90% of vo, set output voltage overshoot - - 3 %vo v in =v in, min to v in, max , i o =i o, 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=25c, co=0 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 2.4 vdc - 5.5 vdc input, 0.6 vdc - 3.63 vdc /3 a output december 10, 2010 bel power inc., a subsid iary 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=25c io=io, max , vo= vo,set vin=5.0v, when vo=3.3v switching frequency - 600 - khz over temperature protection - 140 - c weight - 1.55 - g mtbf 16,139,760 hours calculated mtbf (io=80% full load, ta=40deg c) telcordia issue 2, method i case 3 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 appl y 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 output december 10, 2010 bel power inc., a subsid iary of bel fuse inc. efficiency data 70 72 74 76 78 80 82 84 86 00.511.522.53 vin=5.5v vin=2.4v vin=3.3v 70 75 80 85 90 95 0 0.5 1 1.5 2 2.5 3 vin=5.5v vin=2.4v vin=3.3v efficiency, vo=0.6v vo=1.2v 70 75 80 85 90 95 00.511.522.53 vin=5.5v vin=2.4v vin=3.3v 70 75 80 85 90 95 100 00.5 11.522.53 vin=5.5v vin=3v vin=3.3v efficiency, (%) ) output current, i o (a) efficiency, vo=1.8v vo=2.5v 70 75 80 85 90 95 100 00.5 11.522.53 vin=5.5v vin=4v vin=5v efficiency, 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 output december 10, 2010 bel power inc., a subsid iary of bel fuse inc. thermal derating curves 0 0.5 1 1. 5 2 2.5 3 3.5 20 30 40 50 60 70 80 90 0 lfm 0 0.5 1 1. 5 2 2.5 3 3.5 20 30 40 50 60 70 80 90 0 lfm output current, io ( a ) ambient temperature, t a o c output current, io ( a ) ambient temperature, t a o c vo=0.6v vo=1.2v 0 0.5 1 1. 5 2 2.5 3 3.5 20 30 40 50 60 70 80 90 0 lfm 0 0.5 1 1. 5 2 2.5 3 3.5 20 30 40 50 60 70 80 90 0 lfm output current, io (a) ambient temperature, t a o c output current, io ( a ) ambient temperature, t a o c vo=1.8v vo=2.5v 0 0.5 1 1. 5 2 2.5 3 3.5 20 30 40 50 60 70 80 90 0 lfm output current, io ( a ) ambient temperature, t a o c 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 output december 10, 2010 bel power inc., a subsid iary of bel fuse inc. ripple and noise waveforms output voltage v o ( v ) ( 20mv/div ) time, t (1 s/div) output voltage v o ( v ) ( 20mv/div ) time, t (1 s/div) vin=5v, vo=0.6v, io = io,max vin=5v, vo=1.2v, io = io,max output voltage v o (v) (20mv/div) time, t (1 s/div) output voltage v o ( v ) ( 20mv/div ) time, t (1 s/div) vin=5v, vo=1.8v, io = io,max vin=5v, vo=2.5v, io = io,max output voltage v o ( v ) ( 20mv/div ) time, t (1 s/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 output december 10, 2010 bel power inc., a subsid iary of bel fuse inc. transient response waveforms output current, output voltage i o ( a ) ( 1a/div ) v o ( v ) ( 100mv/div ) time, t (20 s /div) output current, output voltage i o ( a ) ( 1a/div ) v o ( v ) ( 100mv/div ) time, t (20 s /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 i o (a) (1a/div) v o (v) (200mv/div) time, t (20 s /div) output current, output voltage i o ( a ) ( 1a/div ) v o ( v ) ( 200mv/div ) time, t (20 s /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 i o ( a ) ( 1a/div ) v o ( v ) ( 200mv/div ) time, t (20 s /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 output december 10, 2010 bel power inc., a subsid iary of bel fuse inc. startup time on/off voltage output voltage v on/off (v) (2v/div) v o (v) (200mv/div) time, t (1 ms/div) on/off voltage output voltage v on/off ( v ) ( 2v/div ) v o ( v ) ( 500 m v/div ) time, t (1 ms/div) start-up using on/off voltage (i o = i o,max ), vo=0.8v start-up using on/off voltage (i o = i o,max ), vo=1.2v on/off voltage output voltage v on/off ( v ) ( 2v/div ) v o ( v ) ( 500mv/div ) time, t (1 ms/div) on/off voltage output voltage v on/off ( v ) ( 2v/div ) v o ( v ) ( 1v/div ) time, t (1 ms/div) start-up using on/off voltage (i o = i o,max ), vo=1.8v start-up using on/off voltage (i o = i o,max ), vo=2.5v on/off voltage output voltage v on/off (v) (2v/div) v o (v) (1v/div) time, t (1 ms/div) start-up using on/off voltage (i o = i o,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 10 non-isolated dc/dc converters 2.4 vdc - 5.5 vdc input, 0.6 vdc - 3.63 vdc /3 a output december 10, 2010 bel power inc., a subsid iary of bel fuse inc. startup time (continued) input voltage output voltage v in (v) (2v/div) v o (v) (200mv/div) time, t (1 ms/div) input voltage output voltage v in ( v ) ( 2v/div ) v o ( v ) ( 500mv/div ) time, t (1 ms/div) start-up using input voltage (v in = 5v, i o = i o,max ), vo=0.8v start-up using input voltage (v in = 5v, i o = i o,max ), vo=1.2v input voltage output voltage v in ( v ) ( 2v/div ) v o ( v ) ( 1v/div ) time, t (1 ms/div) input voltage output voltage v in ( v ) ( 2v/div ) v o ( v ) ( 1v/div ) time, t (1 ms/div) start-up using input voltage (v in = 5v, i o = i o,max ), vo=1.8v start-up using input voltage (v in = 5v, i o = i o,max ), vo=2.5v input voltage output voltage v in (v) (2v/div) v o (v) (1v/div) time, t (1 ms/div) start-up using input voltage (v in = 5v, i o = i o,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 11 non-isolated dc/dc converters 2.4 vdc - 5.5 vdc input, 0.6 vdc - 3.63 vdc /3 a output december 10, 2010 bel power inc., a subsid iary of bel fuse inc. test configurations input reflected ripple current test setup. to oscilloscope current probe l test 1 h battery c s 1000 f electrolytic e.s.r.<0.1 f tantalum v in (+) com note: measure input reflected ripple current with a simulated source inductance (l test ) of 1 h. capacitor c s offsets possible battery impedance. measure current as shown above. c in 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 u sing bnc socket copper strip ground plane 10uf output voltage and efficiency test setup. v o com v in (+) com r load r contact r distribution r contact r distribution r contact r contact r distribution r distribution v in v o 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. = v o . i o v in . i in 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 12 non-isolated dc/dc converters 2.4 vdc - 5.5 vdc input, 0.6 vdc - 3.63 vdc /3 a output december 10, 2010 bel power inc., a subsid iary of bel fuse inc. input filtering the SLIN-03F2Ax module should be connected to a low ac -impedance source. a highly inductive source can affect the stability of the module. an input capacitor mu st be placed directly adjacen t to the input pin of the module, to minimize input ripple voltage and ensure module stability. to minimize input voltage ripple, low-esr ceramic c apacitors are recommended at the input of the module. figure a shows the input ripple voltage for various output vo ltages at 3a of load current with 1x22 f or 2x22 f ceramic capacitors and an input of 5v. figure b shows dat a for the 3.3vin case, with 1x22f or 2x22f of ceramic capacitors at the input. figure a figure b input ripple voltage (mvp-p) 0 10 20 30 40 50 60 0.51 1.522.533.5 1x22uf 2x22uf input ripple voltage (mvp-p) 0 10 20 30 40 50 60 0.511.522.53 1x22uf 2x22uf output voltage (vdc) output voltage (vdc) output filtering the SLIN-03F2Ax modules are designed for low output ripple voltage and will meet the maximum output ripple specification with 0.1 f ceramic and 10 f ceramic capa citors 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 resp onse to a step load change, additional capacitance at the output can be used. low esr ceramic and polymer 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 load currents of 3a while maintaining an input voltage of 5v. figure b on the next page shows the performance with a 3.3v inpu t. 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 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 13 non-isolated dc/dc converters 2.4 vdc - 5.5 vdc input, 0.6 vdc - 3.63 vdc /3 a output december 10, 2010 bel power inc., a subsid iary of bel fuse inc. fig. a fig. b 0 5 10 15 20 25 30 0.5 1 1.5 2 2.5 3 3.5 output voltage(volts) ripple(mvp-p) 1x10uf external cap 1x47uf external cap 2x47uf external cap 4x47uf external cap 0 5 10 15 20 0.5 1 1.5 2 2.5 3 output voltage(volts) ripple(mvp-p) 1x10uf external cap 1x47uf external cap 2x47uf external cap 4x47uf external cap 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 requir ements 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-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 14 non-isolated dc/dc converters 2.4 vdc - 5.5 vdc input, 0.6 vdc - 3.63 vdc /3 a output december 10, 2010 bel power inc., a subsid iary 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-03F2Ax modules feature an on/off pin for re mote 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 logi c 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 figure a 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. for negative logic on/off modules, the circuit configuration is shown in figure b below. the on/off pin should be pulled high with an external pull-up resistor (suggested va lue for the 2.4v to 5.5vin range is 3.6kohms). when transistor q1 is in the off state, the on/off pin is pu lled 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 v in ? 1.6v. to turn the module on, q1 is turned on pulling the on/off pin low. fig. a fig. b 100k q1 gnd pwm enable on/off vin+ on/off _ + v i module rpullup on/off 2.05k 20k 100 k q1 gnd pwm enable on/ of f vin+ on/off _ + i v modul e on/off 20 k q 2 2 0 k
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 2.4 vdc - 5.5 vdc input, 0.6 vdc - 3.63 vdc /3 a output december 10, 2010 bel power inc., a subsid iary of bel fuse inc. over current protection to provide protection in a fault (out put overload) condition, the unit is e quipped with internal current-limiting circuitry and can endure current limiting continuously. at t he 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 140c is exceeded at the thermal reference point tref. the thermal shutdown is not intended as a guarantee that the unit will survive temperatur es 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 operat ion 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-03F2Ax 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 rest rictions 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 in the figure below. the upper limit cu rve shows that the entire output voltage range is available with the maximum input voltage of 5.5v. the lower limi t curve shows that for output voltages of 1.8v and higher, the input voltage needs to be larger than the minimum of 2.4v. 0 1 2 3 4 5 6 0.511.522.533.54 output voltage (v) input voltage (v) upper limit lower limit
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 2.4 vdc - 5.5 vdc input, 0.6 vdc - 3.63 vdc /3 a output december 10, 2010 bel power inc., a subsid iary 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: () ? ? ? ? ? ? ? = k vo rtrim 6 . 0 2 . 1 rtrim is the external resistor in k ? vo is the desired output voltage. 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. table 1 provides rtrim values required for some common output voltages. table 1 circuit configuration for prog ramming output voltage using an external resistor remote sense the SLIN-03F2Ax power modules have a remote sense featur e 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 t he remote sense feature is not being used, connect the sense pin to the vout pin . v o, set (v) rtrim ( k ? ) 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
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 2.4 vdc - 5.5 vdc input, 0.6 vdc - 3.63 vdc /3 a output december 10, 2010 bel power inc., a subsid iary of bel fuse inc. voltage margining output voltage margining can be implemented in the SLIN-03F2Ax 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. t he figure below shows the circui t configuration for output voltage margining. vo module gnd trim q1 rtrim rmargin-up q2 rmargin-down circuit configuration for margining output voltage monotonic start-up and shutdown the SLIN-03F2Ax 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-03F2Ax modules can start into a prebiased output as long as the prebias voltage is 0.5v less than the set output voltage.
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 2.4 vdc - 5.5 vdc input, 0.6 vdc - 3.63 vdc /3 a output december 10, 2010 bel power inc., a subsid iary of bel fuse inc. tunable loop tm the SLIN-03F2Ax modules have a new feature that optim izes transient response of the module called tunable loop tm . 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 st eady-state value in the presence of dynamic load current changes. adding external capacitance however a ffects 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. 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 r tune and c tune to tune the control loop of the module recommended values of r tune and c tune 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 c tune for different values of ceramic output capacitors up to 470uf that might be needed for an applicat ion to meet output ripple and noise requirements for 5vin and 3.3vin respectively. selecting r tune and c tune according to table 2 will en sure 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 c tune in order to meet 2% output voltage deviation limits for some common output vo ltages 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.
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 2.4 vdc - 5.5 vdc input, 0.6 vdc - 3.63 vdc /3 a output december 10, 2010 bel power inc., a subsid iary of bel fuse inc. tunable loop tm (continued) table 2 .general recommended values of r tune and c tune for vin=5v and various external ceramic capacitor combinations. co 1x47 f 2x47 f 4x47 f 6x47 f 10x47 f r tune 33 33 33 33 33 c tune 6800pf 15nf 33nf 47nf 56nf table 3 .recommended values of r tune and c tune to obtain transient deviation of 2% of vout for a 1.5a step load with vin=5v. vo 3.3v 2.5v 1.8v 1.2v 0.6v co 1 x 47 f 2 x 47 f 2 x 47 f 4 x 47 f 2 x 47 f +330 f polymer r tune 33 33 33 33 33 c tune 6800pf 15nf 15nf 33nf 82nf v 59mv 35mv 35mv 21mv 12mv table 4 . general recommended values of r tune and c tune for vin=3.3v and various external ceramic capacitor combinations. cext 1x47 f 2x47 f 4x47 f 6x47 f 10x47 f r tune 33 33 33 33 33 c tune 15nf 27nf 47nf 56nf 68nf table 5 . recommended values of r tune and c tune to obtain transient deviation of 2% of vout for a 1.5a step load with vin=3.3v. vo 2.5v 1.8v 1.2v 0.6v co 2 x 47 f 2 x 47 f 4 x 47 f 4 x 47 f +330 f polymer r tune 33 33 33 33 c tune 22nf 27nf 47nf 150nf v 46mv 32mv 24mv 12mv
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 2.4 vdc - 5.5 vdc input, 0.6 vdc - 3.63 vdc /3 a output december 10, 2010 bel power inc., a subsid iary of bel fuse inc. thermal considerations power modules operate in a variety of thermal envir onments; 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 meas urements taken in a wind tunnel. the test set-up is shown below. a ir flow x power module w ind 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 shown below. for reliable operation the temperatures at this point should not exceed 125 o c. the output power of the modul e should not exceed the rated power of the module (vo,set x io,max).
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 2.4 vdc - 5.5 vdc input, 0.6 vdc - 3.63 vdc /3 a output december 10, 2010 bel power inc., a subsid iary 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 vout: 1.5% of vout (27mv) for worst case load transient vin, ripple 1.5% of vin (50mv, p-p) ci1 22 f/6.3v ceramic capacitor ci2 47 f/6.3v bulk electrolytic co1 2 x 47 f/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 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 22 non-isolated dc/dc converters 2.4 vdc - 5.5 vdc input, 0.6 vdc - 3.63 vdc /3 a output december 10, 2010 bel power inc., a subsid iary of bel fuse inc. mechanical outline pin function 1 on/off 2 vin 3 gnd 4 vout 5 sense 6 trim 7 gnd 8 nc 9 nc 10 nc pin 7 pin 8 pin 10
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 2.4 vdc - 5.5 vdc input, 0.6 vdc - 3.63 vdc /3 a output december 10, 2010 bel power inc., a subsid iary of bel fuse inc. mechanical outline (continued) recommended pad layout 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.) pin 10 pin 8 pin 7
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 2.4 vdc - 5.5 vdc input, 0.6 vdc - 3.63 vdc /3 a output december 10, 2010 bel power inc., a subsid iary of bel fuse inc. packaging details the SLIN-03F2Ax modules are supplied in tape & reel as standard. all dimensions are in m illimeters 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 25 non-isolated dc/dc converters 2.4 vdc - 5.5 vdc input, 0.6 vdc - 3.63 vdc /3 a output december 10, 2010 bel power inc., a subsid iary of bel fuse inc. surface mount information pick and place the SLIN-03F2Ax 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 surf ace mount processing, as well as safety standards, and is able to withstand reflow temperatures of up to 300 o c. 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 sh ould 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-03F2Ax modules are lead-free (pb-free) and rohs compliant and are both forward and backward compatible in a pb-free and a snpb soldering process. failure to observe the instru ctions 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 refl ow 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 below. per j-std-020 rev. c 0 50 100 150 200 250 300 reflow time (seconds) reflow temp (c) heating zone 1c/second peak temp 260c * min. time above 235c 15 seconds *time above 217c 60 seconds cooling zone recommended linear reflow profile using sn/ag/cu solder msl rating the SLIN-03F2Ax modules have a msl rating of 2.
? 2010 bel fuse inc. specifications subject to change without notice. 121010 26 corporate far east europe bel fuse inc. bel fuse ltd. bel fuse europe ltd. 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 output december 10, 2010 bel power inc., a subsid iary of bel fuse inc. storage and handling the recommended storage environment and handling proc edures 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 <= 30c 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 condi tions: < 40 c, < 90% relative humidity. post solder cleaning and drying considerations post solder cleaning is usually the final circuit-board as sembly process prior to elec trical 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 2010-4-14 a first release t. bubriski 2010-12-10 b updated output short-circuit current on page 3. t. bubriski rohs compliance complies with the european directive 2002/95/e c, calling for the elimination of lead and other hazardous substances from electronic products.

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