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1foff18 semtech ts51221 triunefproducts features ? fixed output voltage choices: 1.5v, 1.8v, 2.5v, 3.3v, and 5v with +/- 2% output tolerance ? adjustable version output voltage range: 0.9v to 5.5v with +/- 1.5% reference ? wide input voltage range: 4.5v to 24v ? 1mhz +/- 10% fxed switching frequency ? input under voltage lockout ? full protection for over-current, over-temperature, and v out over-voltage ? low external component count summaryfspecifcation ? junction operating temperature -40 c to 125 c ? packaged in a 16pin qfn (3x3) highfefciencyfregulatorficfforf f wirelessfpowerfreceiverfapplications descriptionf the ts51221 is a high-efciency regulator device for low- power wireless power receiver applications. the switching frequency of 1mhz enables the use of small flter components resulting in minimal board space and reduced bom costs. the ts51221 integrates a wide range of protection circuitry including input supply under-voltage lockout, output voltage soft start, current limit, and thermal shutdown. applications ? wireless charging for portable devices ? wear-ables, medical monitors ? bluetooth headsets ? smart watches typicalfapplicationfcircuit load receiver ts51221 transmitter ts5123 1 dc supply application processor application processor ts51221 final datasheet rev 1.1 april 6, 2015 www.semtech.com
2foff18 semtech pinout figuref1:f16fleadf3x3fqfn,ftopfview pinfdescription pinf# pinfname pinffunction description 1 vsw switching voltage node connected to 4.7uh (typical) inductor 2 vcc input voltage input voltage 3 vcc input voltage input voltage 4 gnd gnd primary ground for the majority of the device except the low-side power fet 5 fb feedback input regulator fb voltage. connects to v out for fxed mode and the output resistor divider for adjustable mode 6 nc no connect not connected 7 nc no connect not connected 8 pg power good output open-drain output 9 en enable input above 2.2v the device is enabled. gnd the pin to put device in standby mode. includes internal pull-up 10 bst bootstrap capacitor bootstrap capacitor for the high-side fet gate driver. 22nf ceramic capacitor from bst pin to vsw pin 11 vcc input voltage input voltage 12 vsw switching voltage node connected to 4.7uh (typical) inductor 13 vsw switching voltage node connected to 4.7uh (typical) inductor 14 pgnd power gnd gnd supply for internal low-side fet/integrated diode 15 pgnd power gnd gnd supply for internal low-side fet/integrated diode 16 vsw switching voltage node connected to 4.7uh (typical) inductor vcc vcc gnd vsw vcc bst en vsw pgnd pgnd vsw vsw nc nc fb pg ts 51221 pin 1 ts51221 final datasheet rev 1.1 april 6, 2015 www.semtech.com
3foff18 semtech functionalfblockfdiagram figuref2:ffts51221fblockfdiagram absolutefmaximumfratingf over operating freeCair temperature range unless otherwise noted (1, 2) parameter value unit vcc -0.3 to 26.4 v bst -0.3 to (vcc+6) v vsw -1 to 26.4 v en, pg,fb -0.3 to 6 v electrostatic discharge C human body model +/-2k v electrostatic discharge C charge device model +/-500 v lead temperature (soldering, 10 seconds) 260 c notes: (1) stresses beyond those listed under absolute maximum ratings may cause permanent damage to the device. these are stress ratings only and functional operation of the device at these or any other conditions beyond those indicated under recommended operating conditions is not implied. exposure to absoluteCmaximumCrated conditions for extended periods may affect device reliability. (2) all voltage values are with respect to network ground terminal. ts51221 final datasheet rev 1.1 april 6, 2015 www.semtech.com
4foff18 semtech thermalfcharacteristics symbol parameter value units ja thermal resistance junction to air (note 1) 34.5 c/w jc thermal resistance junction to case (note 1) 2.5 c/w t stg storage temperature range -65 to 150 c t j max maximum junction temperature 150 c t j operating junction temperature range -40 to 125 c note 1: assumes 16ld 3x3 qfn with hi-k jedec board and 13.5 inch2 of 1 oz cu and 4 thermal vias connected to pad recommendedfoperatingfconditions symbol parameter min typ max unit v cc input operating voltage 4.5 12 24 v c bst bootstrap capacitor 17.6 22 26.4 nf l out output filter inductor typical value (note 1) 3.76 4.7 5.64 uh c out output filter capacitor typical value (note 2) 33 44 (2 x 22) uf c out-esr output filter capacitor esr 2 100 m c bypass input supply bypass capacitor typical value (note 3) 8 10 uf note 1: for best performance, an inductor with a saturation current rating higher than the maximum v out load requirement plus the inductor current ripple. note 2: for best performance, a low esr ceramic capacitor should be used. note 3: for best performance, a low esr ceramic capacitor should be used. if c bypass is not a low esr ceramic capacitor, a 0.1uf ceramic capacitor should be added in parallel to c bypass . ts51221 final datasheet rev 1.1 april 6, 2015 www.semtech.com
5foff18 semtech electricalfcharacteristics electrical characteristics, t j = -40c to 125c, vcc = 12v (unless otherwise noted) symbol parameter condition min typ max unit vccfsupplyfvoltage v cc input supply voltage 4.5 24 v i cc-norm quiescent current normal mode v cc = 12v, i load = 0a 5.2 ma i cc-noswitch quiescent current normal mode C non-switching v cc =12v, i load =0a, non-switching 2.3 ma i cc-stby quiescent current standby mode v cc = 12v, en = 0v 5 10 ua vccfunderfvoltageflockout v cc-uv input supply under voltage threshold v cc increasing 4.3 4.5 v v cc-uv_hyst input supply under voltage threshold hysteresis 650 mv osc f osc oscillator frequency 0.9 1 1.1 mhz pgfopenfdrainfoutput t pg pg release timer 10 ms i oh-pg high-level output leakage v pg = 5v 0.5 ua v ol-pg low-level output voltage i pg = -0.3ma 0.01 v enfinputfvoltagefthresholds v ih-en high level input voltage 2.2 v v il-en low level input voltage 0.8 v v hyst-en input hysteresis 480 mv i in-en input leakage v en =5v 3.5 ua v en =0v -1.5 ua thermalfshutdown tsd thermal shutdown junction temperature note: not tested in production 150 170 c tsd hyst tsd hysteresis note: not tested in production 10 c ts51221 final datasheet rev 1.1 april 6, 2015 www.semtech.com
6foff18 semtech regulatorfcharacteristics electrical characteristics, t j = -40c to 125c, vcc = 12v (unless otherwise noted) symbol parameter condition min typ max unit switchfmodefregulator:ffl=4.7uhfandfc=2fxf22uf v out-pwm output voltage tolerance in pwm mode i load =1a v out C 2% v out v out + 2% v v out-pfm output voltage tolerance in pfm mode i load = 0a v out C 1% v out + 1% v out + 3.5% v r dson high side switch on resistance i vsw = -1a (note 1) 180 m low side switch on resistance i vsw = 1a (note 1) 120 m i out output current 1 a i ocd over current detect hs switch current 1.4 1.8 2.4 a fb th feedback reference (adjustable mode) (note 3) 0.886 0.9 0.914 v fb th-tol feedback reference tolerance (note 3) -1.5 1.5 % t ss soft start ramp time 4 ms fb th-pfm pfm mode fb comparator threshold v out + 1% v v out-uv v out under voltage threshold 91% v out 93% v out 95% v out v out-uv_hyst v out under voltage hysteresis 1.5% v out v out-ov v out over voltage threshold 103% v out v out-ov_hyst v out over voltage hysteresis 1% v out duty max max duty cycle (note 2) 95% 97% 99% note 1: r dson is characterized at 1a and tested at lower current in production. note 2: regulator vsw pin is forced off for 240ns every 8 cycles to ensure the bst cap is replenished. note 3: for the adjustable version, the ratio of vcc/v out cannot exceed 16. note 4: based on over current detect testing ts51221 final datasheet rev 1.1 april 6, 2015 www.semtech.com
7foff18 semtech functionalfdescription the ts51221 wireless power receiver device is a switching converter that includes fexibility to be used for a wide range of input voltages and is optimized for high efciency power conversion with low r dson integrated synchronous switches. a 1mhz internal switching frequency facilitates low cost lc flter combinations. additionally, the fxed output versions enable a minimum external component count to provide a complete regulation solution with only 4 external components: an input bypass capacitor, an inductor, an output capacitor, and the bootstrap capacitor. detailedfpinfdescripttion unregulatedfinput,fvcc this terminal is the unregulated input voltage source from the rectifed receiver coil voltage. it is recommended that a 10uf bypass capacitor be placed close to the device for best performance. since this is also the main supply for the ic, good layout practices need to be followed for this connection. bootstrapfcontrol,fbst this terminal will provide the bootstrap voltage required for the upper internal nmos switch of the buck regulator. an external ceramic capacitor placed between the bst input terminal and the vsw pin will provide the necessary voltage for the upper switch. in normal operation the capacitor is re-charged on every low side synchronous switching action. in the case of where the switch mode approaches 100% duty cycle for the high side fet, the device will automatically reduce the duty cycle switch to a minimum of time on every 8th cycle to allow this capacitor to re-charge. senseffeedback,ffb f this is the input terminal for the output voltage feedback. for the fxed mode versions, this should be hooked directly to v out . the connection on the pcb should be kept as short as possible, and should be made as close as possible to the capacitor. the trace should not be shared with any other connection. (figure 23) for adjustable mode versions, this should be connected to the external resistor divider. to choose the resistors, use the following equation: v out = 0.9 (1 + r top /r bot ) the input to the fb pin is high impedance, and input current should be less than 100na. as a result, good layout practices are required for the feedback resistors and feedback traces. when using the adjustable version, the feedback trace should be kept as short as possible and minimum width to reduce stray capacitance and to reduce the injection of noise. for the adjustable version, the ratio of vcc/v out cannot exceed 16. switchingfoutput,fvsw this is the switching node of the regulator. it should be connected directly to the 4.7uh inductor with a wide, short trace and to one end of the bootstrap capacitor. it is switching between vcc and pgnd at the switching frequency. ground,fgnd this ground is used for the majority of the device including the analog reference, control loop, and other circuits. powerfground,fpgnd this is a separate ground connection used for the low side synchronous switch to isolate switching noise from the rest of the device. (figure 23) enable,fhigh-voltage,fen this is the input terminal to activate the regulator. the input threshold is ttl/cmos compatible. it also has an internal pull- up to ensure a stable state if the pin is disconnected. powerfgoodfoutput,fpg this is an open drain, active low output. the switched mode output voltage is monitored and the pg line will remain low until the output voltage reaches the v out -uv threshold. once the internal comparator detects the output voltage is above the desired threshold, an internal delay timer is activated and the pg line is de-asserted to high once this delay timer expires. in the event the output voltage decreases below v out -uv , the pg line will be asserted low and remain low until the output rises above v out -uv and the delay timer times out. see figure 2 for the circuit schematic for the pg signal. ts51221 final datasheet rev 1.1 april 6, 2015 www.semtech.com
8foff18 semtech vccfunder-voltageflockout the device is held in the of state until vcc reaches 4.5v (typical). there is a 500mv hysteresis on this input, which requires the input to fall below 4.0v (typical) before the device will disable. internalfprotectionfdetailsf internalfcurrentflimit the current through the high side fet is sensed on a cycle by cycle basis and if current limit is reached, it will abbreviate the cycle. in addition, the device senses the fb pin to identify hard short conditions and will direct the vsw output to skip 4 cycles if current limit occurs when fb is low. this allows current built up in the inductor during the minimum on time to decay sufciently. current limit is always active when the regulator is enabled. soft start ensures current limit does not prevent regulator startup. under extended over current conditions (such as a short), the device will automatically disable. once the over current condition is removed, the device returns to normal operation automatically. (alternately the factory can confgure the devices nvm to shutdown the regulator if an extended over current event is detected and require a toggle of the enable pin to return the device to normal operation.) thermalfshutdown if the temperature of the die exceeds 170c (typical), the vsw outputs will tri-state to protect the device from damage. the pg and all other protection circuitry will stay active to inform the system of the failure mode. once the device cools to 160c (typical), the device will start up again, following the normal soft start sequence. if the device reaches 170c, the shutdown/ restart sequence will repeat. referencefsoftfstart the reference in this device is ramped at a rate of 4ms to prevent the output from overshoot during startup. this ramp restarts whenever there is a rising edge sensed on the enable pin. this occurs in both the fxed and adjustable versions. during the soft start ramp, current limit is still active, and will still protect the device in case of a short on the output. outputfovervoltage if the output of the regulator exceeds 103% of the regulation voltage, the vsw outputs will tri-state to protect the device from damage. this check occurs at the start of each switching cycle. if it occurs during the middle of a cycle, the switching for that cycle will complete, and the vsw outputs will tri-state at the beginning of the next cycle. ts51221 final datasheet rev 1.1 april 6, 2015 www.semtech.com
9foff18 semtech typicalfperformancefcharacteristics t j = -40c to 125c, vcc = 12v (unless otherwise noted) - 9 - ts51221 version 1.1 specifications subject to change www.triunesystems.com copyright ? 2012 , triune systems, llc typical performance characteristics t j = -40c to 125c, vcc = 12v (unless otherwise noted) figure 3. startup response figure 4. 100ma to 1a load step (vcc=12v, v out =1.8v) figure 5. 100ma to 2a load (v cc =12v, v out =1.8v) figure 6. 100ma to 1a load step (v cc =12v, v out =3.3v) figure 7. 100ma to 2a load step (v cc =12v, v out =3.3v) figure 8. line transient response (vcc=12v, v out =3.3v) 5v/div 1 v/div 500ma /div 50m v/div 1a /div 100m v/div 1a /div 100m v/div 5v /div 50m v/div 2a /div 100m v/div ts51221 final datasheet rev 1.1 april 6, 2015 www.semtech.com
10foff18 semtech typicalfperformancefcharacteristics t j = -40c to 125c, vcc = 12v (unless otherwise noted) - 10 - ts51221 version 1.1 specifications subject to change www.triunesystems.com copyright ? 2012 , triune systems, llc typical performance characteristics t j = -40c to 125c, vcc = 12v (unless otherwise noted) figure 9. load regulation figure 10. line regulation (i out =1a) figure 11. efficiency vs. output current ( v out = 1.8v) figure 12. efficiency vs. output current ( v out = 3.3v) figure 13 . efficiency vs. output current ( v out = 5v) figure 14 . efficiency vs. input voltage (v out = 3.3v) ts51221 final datasheet rev 1.1 april 6, 2015 www.semtech.com
11foff18 semtech typicalfperformancefcharacteristics t j = -40c to 125c, vcc = 12v (unless otherwise noted) - 11 - ts51221 version 1.1 specifications subject to change www.triunesystems.com copyright ? 2012 , triune systems, llc typical performance characteristics t j = -40c to 125c, vcc = 12v (unless otherwise noted) figure 15. standby current vs. input voltage figure 16. standby current vs. temperature figure 17. output voltage vs. temperature figure 18. oscillator frequency vs. temperature (io ut=300ma) figure 19. quiescent current vs. temperature (no l oad) figure 20. input current vs. temperature (no load, no switching) 4.0 4.5 5.0 5.5 6.0 6.5 7.0 -50 0 50 100 150 standby current (ua) temperature ( c) iout=300ma iout=30ma 3.280 3.285 3.290 3.295 3.300 3.305 3.310 -50 0 50 100 150 output voltage (v) temperature ( c) 0.95 0.97 0.99 1.01 1.03 1.05 -50 0 50 100 150 oscillator frequency (mhz) temperature ( c) 4.00 4.50 5.00 5.50 6.00 -50 0 50 100 150 quiscent current (ma) temperature ( c) 1.84 1.86 1.88 1.9 1.92 1.94 1.96 1.98 2 -50 0 50 100 150 input current no sw (ma) temperature (c) ts51221 final datasheet rev 1.1 april 6, 2015 www.semtech.com
12foff18 semtech pcbflayout for proper operation and minimum emi, care must be taken during pcb layout. an improper layout can lead to issues such as poor stability and regulation, noise sensitivity and increased emi radiation. (fgure 23) the main guidelines are the following: ? provide low inductive and resistive paths for loops with high di/dt, ? provide low capacitive paths with respect to all the other nodes for traces with high di/dt, ? sensitive nodes not assigned to power transmission should be referenced to the analog signal ground (gnd) and be always separated from the power ground (pgnd). the negative ends of c bypass , c out and the schottky diode d catch (optional) should be placed close to each other and connected using a wide trace. vias must be used to connect the pgnd node to the ground plane. the pgnd node must be placed as close as possible to the ts51221 pgnd pins to avoid additional voltage drop in traces. the bypass capacitor c bypass (optionally paralleled to a 0.1f capacitor) must be placed close to the vcc pins of ts51221. the inductor must be placed close to the vsw pins and connected directly to c out in order to minimize the area between the vsw pin, the inductor, the c out capacitor and the pgnd pins. the trace area and length of the switching nodes vsw and bst should be minimized. for the adjustable output voltage version of the ts51221, feedback resistors r bot and r top are required for vout settings greater than 0.9v and should be placed close to the ts51221 in order to keep the traces of the sensitive node fb as short as possible and away from switching signals. rbot should be connected to the analog ground pin (gnd) directly and should never be connected to the ground plane. the analog ground trace (gnd) should be connected in only one point to the power ground (pgnd). a good connection point is under the ts51221 package to the exposed thermal pad and vias which are connected to pgnd. r bot will be connected to the vout node using a trace that ends close to the actual load. for fxed output voltage versions of the ts51221, r bot and r top are not required and the fb pin should be connected directly to the v out . the exposed thermal pad must be soldered to the pcb for mechanical reliability and to achieve good power dissipation. vias must be placed under the pad to transfer the heat to the ground plane. figuref1:ffts51221fapplicationfschematic typicalfapplicationfschematic ts51221 final datasheet rev 1.1 april 6, 2015 www.semtech.com
13foff18 semtech externalfcomponentfbillfoffmaterials designator function description suggestedf manufacturer manufacturerfcode qty c bypass input supply bypass capacitor 10uf 10% 35v tdk cga5l3x5r1v106k160ab 1 c out output filter capacitor 22uf 10% 10v tdk c2012x5r1a226k125ab 2 l out output filter inductor 4.7uh 2a tdk wurth slf7045t-4r7m2r0-pf 7447745047 1 c bst boost capacitor 22nf 10v tdk c1005x7r1c223k 1 r top voltage feedback resistor (optional) 17.8k (note 1) 1 r bot voltage feedback resistor (optional) 10k (note 1) 1 r plp pg pin pull-up resistor (optional) 10k 1 d catch catch diode (optional) 30v 2a sod-123fl on semiconductor mbr230lsft1g 1 note 1: the voltage divider resistor values are calculated for an output voltage of 2.5v. for fxed output versions, the fb pin is connected directly to v out . figuref:ffts51221fpcbflayout,ftopfview pcbflayout ts51221 final datasheet rev 1.1 april 6, 2015 www.semtech.com
14foff18 semtech externalfcomponentfselection the 1mhz internal switching frequency of the ts51221 facilitates low cost lc flter combinations. additionally, the fxed output versions enable a minimum external component count to provide a complete regulation solution with only 4 external components: an input bypass capacitor, an inductor, an output capacitor, and the bootstrap capacitor. the internal compensation is optimized for a 44uf output capacitor and a 4.7uh inductor. for best performance, a low esr ceramic capacitor should be used for c bypass . if c bypass is not a low esr ceramic capacitor, a 0.1uf ceramic capacitor should be added in parallel to c bypass . the minimum allowable value for the output capacitor is 33uf. to keep the output ripple low, a low esr (less than 35mohm) ceramic is recommended. multiple capacitors can be paralleled to reduce the esr. the inductor range is 4.7uh +/-20%. for optimal over-current protection, the inductor should be able to handle up to the regulator current limit without saturation. otherwise, an inductor with a saturation current rating higher than the maximum i out load requirement plus the inductor current ripple should be used. for high current modes, the optional schottky diode will improve the overall efciency and reduce the heat. it is up to the user to determine the cost/beneft of adding this additional component in the users application. the diode is typically not needed. for the adjustable output version of the ts51221, the output voltage can be adjusted by sizing r top and r bot feedback resistors. the equation for the output voltage is for the adjustable version, the ratio of vcc/v out cannot exceed 16. r pup is only required when the power good signal (pg) is utilized. thermalfinformation ts51221 is designed for a maximum operating junction temperature t j of 125c. the maximum output power is limited by the power losses that can be dissipated over the thermal resistance given by the package and the pcb structures. the pcb must provide heat sinking to keep the ts51221 cool. the exposed metal on the bottom of the qfn package must be soldered to a ground plane. this ground should be tied to other copper layers below with thermal vias. adding more copper to the top and the bottom layers and tying this copper to the internal planes with vias can reduce thermal resistance further. for a hi-k jedec board and 13.5 square inch of 1 oz cu, the thermal resistance from junction to ambient can be reduced to ja = 38c/w. the power dissipation of other power components (catch diode, inductor) cause additional copper heating and can further increase what the ts51221 sees as ambient temperature. 0.9 1 top bot r vout r ?? ?? = ?+ ?? ?? ?? ?? ?? ts51221 final datasheet rev 1.1 april 6, 2015 www.semtech.com
15foff18 semtech packagefmechanicalfdrawingsf(allfdimensionsfinfmm) units millimeters dimensions limits min nom max number of pins n 16 pitch e 0.50 bsc overall height a 0.80 0.90 1.00 standof a1 0.00 0.02 0.05 contact thickness a3 0.20 ref overall length d 3.00 bsc exposed pad width e2 1.55 1.70 1.80 overall width e 3.00 bsc exposed pad length d2 1.55 1.70 1.80 contact width b 0.20 0.25 0.30 contact length l 0.20 0.30 0.40 contact-to-exposed pad k 0.20 - - top vi e w bo ttom vi e w ex pose d pa d ts51221 final datasheet rev 1.1 april 6, 2015 www.semtech.com
16foff18 semtech recommendedffpcbflandfpattern units millimeters dimensions limits min nom max contact pitch e 0.50 bsc optional center pad width w2 - - 1.70 optional center pad length t2 - - 1.70 contact pad spacing c1 - 3.00 - contact pad spacing c2 - 3.00 - contact pad width (x16) x1 - - 0.35 contact pad length (x16) y1 - - 0.65 distance between pads g 0.15 - - notes: dimensions and tolerances per asme y14.5m. bsc: basic dimension. theoretically exact values shown without tolerances. ref: reference dimension, usually without tolerance, for information only. ts51221 final datasheet rev 1.1 april 6, 2015 www.semtech.com
17foff18 semtech packagefinformation pb-freef(rohs) : the ts51221 devices are fully compliant for all materials covered by european union directive 2002/95/ec, and meet all ipc-1752 level 3 materials declaration requirements. msl,fpeakftemp : the ts51221 family has a moisture sensitivity level (msl) 1 rating per jedec j-std-020d. these devices also have a peak profle solder temperature (tp) of 260c. orderingfinformation ts51221-mvvvqfnr vvv outputfvoltage 015 1.5 v 018 1.8 v 025 2.5 v 033 3.3 v 050 5.0 v 000 adjustable ts51221 final datasheet rev 1.1 april 6, 2015 www.semtech.com
18foff18 semtech ts51221 final datasheet rev 1.1 april 6, 2015 contactfinformation semtechfcorporation 200fflynnfroad,fcamarillo,fcaf93012 phone:f(805)f498-2111,ffax:f(805)f498-3804 www.semtech.com importantfnotice informationfrelatingftofthisfproductfandfthefapplicationforfdesignfdescribedfhereinfisfbelievedftofbefreliable,fhoweverfsuchfinformationfisfprovidedfasfaf guidefonlyfandfsemtechfassumesfnofliabilityfforfanyferrorsfinfthisfdocument,forfforfthefapplicationforfdesignfdescribedfherein.fsemtechfreservesfthefrightf tofmakefchangesftofthefproductforfthisfdocumentfatfanyftimefwithoutfnotice.fbuyersfshouldfobtainftheflatestfrelevantfinformationfbeforefplacingfordersf andfshouldfverifyfthatfsuchfinformationfisfcurrentfandfcomplete.fsemtechfwarrantsfperformancefoffitsfproductsftofthefspecifcationsfapplicablefatftheftimef offsale,fandfallfsalesfarefmadefinfaccordancefwithfsemtechsfstandardftermsfandfconditionsfoffsale.f semtechfproductsfarefnotfdesigned,fintended,fauthorizedforfwarrantedftofbefsuitablefforfusefinflife-supportfapplications,fdevicesf orfsystems,forfinfnuclearfapplicationsfinfwhichftheffailurefcouldfbefreasonablyfexpectedftofresultfinfpersonalfinjury,flossfofflifef orfseverefpropertyforfenvironmentalfdamage.ffinclusionfoffsemtechfproductsfinfsuchfapplicationsfisfunderstoodftofbefundertakenf solelyfatfthefcustomersfownfrisk.fshouldfafcustomerfpurchaseforfusefsemtechfproductsfforfanyfsuchfunauthorizedfapplication,fthefcustomerfshallf indemnifyfandfholdfsemtechfandfitsfofcers,femployees,fsubsidiaries,fafliates,fandfdistributorsfharmlessfagainstfallfclaims,fcostsfdamagesfandfattorneyf feesfwhichfcouldfarise. thefsemtechfnamefandflogofarefregisteredftrademarksfoffthefsemtechfcorporation.fallfotherftrademarksfandftradefnamesfmentionedfmayfbefmarksfandf namesfoffsemtechforftheirfrespectivefcompanies.fsemtechfreservesfthefrightftofmakefchangesfto,forfdiscontinuefanyfproductsfdescribedfinfthisfdocumentf withoutffurtherfnotice.fsemtechfmakesfnofwarranty,frepresentationforfguarantee,fexpressforfimplied,fregardingfthefsuitabilityfoffitsfproductsfforfanyf particularfpurpose.fallfrightsfreserved. ?fsemtechf2015

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