{"text_format":"1","workbook":"xlsx","n_sheets":3,"sheets":["LM5088 Calculator","Power Dissipation","Bode Plots"],"not_rendered":{"charts":4,"images":3,"macros":1,"external_links":0,"defined_names":56,"comments":2,"pivot_tables":0},"unopened":[],"bounds":{"document_bytes":16777216,"sheet_cells":100000,"rows_first":2000,"rows_last":500,"rows_between":2000,"halvings":0,"cell_chars":16384,"cell_head_chars":4096},"cells_cut":0,"cells_raw":0,"read":"whole","date_system":"1900"}

{"sheet":"LM5088 Calculator","index":0,"n_rows":63,"n_cols":36,"rows_kept":63,"cut":false,"hidden":false,"merged":[[31,4,31,7]]}
["LM(2)5088-1/2 Quick Start Component Calculator",null,null,"Date:1 Dec 2008",null,"Ajay Hari","Version 1.1"]
[]
[]
[]
[]
[]
["Step 1 General Requirements"]
["Enter Design parameters in the shaded","Vin(min)(V)",35,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,"Controller Selection"]
["Cells","Vin(max)(V)",36,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,"Dither"]
[null,"Vout(V)",32,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,"Restart"]
[null,"Max. Load Current (A)",1.5]
[null,"Ripple Current % of Max. Load Current",0.2,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,"Yes"]
[null,"Peak-Peak output voltage ripple(mV) ",20,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,"No"]
[null,"Max. output volts deviation(mV)",100]
["Step 2 Controller Selection",{"$f":"IF(Vin_min<Vout,\"It is a Buck converter\",\"\")","v":""}]
[null,"Select the Controller Version ","Restart"]
[null,"Recommended Device",{"$f":"IF(ControllerSelect=\"Restart\", (IF(Vin_max>42,\"LM5088-2\",\"LM25088-2\")),(IF(Vin_max>42,\"LM5088-1\",\"LM25088-1\")))","v":"LM25088-2"}]
[]
["Step 3 Switching Frequency","Fsw(kHz)",250]
[{"$f":"IF(Fsw>MIN(Fswmax,Fswmin),\"Part will enter into low dropout mode at VinMin, Decrease Fsw or, Change Vin/Vout range\",\" \")","v":"Part will enter into low dropout mode at VinMin, Decrease Fsw or, Change Vin/Vout range"}]
["Step 4 Frequency Programming","RRT(kΩ)",{"$f":"((0.001/Fsw)-280*0.000000001)/(152*0.000000001)","v":24.473684210526315}]
[]
["Step 5 Inductor Value","L(μH)",{"$f":"(Vout/(I_load_ripple*Max_Ave_Iload*Fsw*10000))*(1-(Vout/Vin_max))*10000000","v":47.407407407407426}]
[]
["Step 6 Current Limit","Target(% Beyond Max. Load)",0.1]
[null,"Peak Load Current at Current Limit (A)",{"$f":"(1+ILoad_margin)*Max_Ave_Iload*(1+(I_load_ripple/2))","v":1.8150000000000004}]
[null,"Current Sense Resistor (Rs)(mΩ)",{"$f":"0.12/(Ipk_load+(Vout/(L*Fsw*0.001)))*1000","v":26.578073089701004}]
[]
["Step 7 Ramp Configuration","CRamp(pF)",{"$f":"5*100*L/Rs","v":891.85185185185196}]
[null,{"$f":"IF(C30=\"\",\" \",\"Rramp(kΩ)\")","v":"Rramp(kΩ)"},{"$f":"IF(Vout>5, (VCC-Vramp)*1000/(Ios-25), \"NA\")","v":51.880767811000375}]
[]
["Step 8 Output Capacitors","COUT1(uF)",{"$f":"(L*((Max_Ave_Iload+(I_load_ripple*Max_Ave_Iload/2))^2))/(((Op_Deviation/1000)+Vout)^2-Vout^2)","v":20.135205408216077},null,"LM5088 List of Components"]
[null,"COUT2(uF)",390,null,"Component","Description","Value","Rating"]
[null,"Max. Allowable ESR(mΩ)",{"$f":"DeltaVout/(I_load_ripple*Max_Ave_Iload)","v":66.666666666666657},null,"Cin ","Input capacitor",5.3666666666666654,{"$f":"Vin_max*1.3","v":46.800000000000004}]
[null,"COUT_TOTAL (uF)",{"$f":"Cout1+Cout2","v":410.13520540821605},null,"CRamp","Ramp capacitor",{"$f":"Cramp","v":891.85185185185196},"5 V"]
[null,null,null,null,"Css","Soft start capacitor",{"$f":"Css","v":8.3333333333333332E-3},"5 V"]
["Step 9 Input Capacitors","Input Capacitor Cin(uF)",{"$f":"Max_Ave_Iload/2/Fsw*1000","v":3},null,"COUT1","Output capacitor",{"$f":"Cout1","v":20.135205408216077},{"$f":"Vout*1.1","v":35.200000000000003}]
[null,null,null,null,"COUT2","Output capacitor",{"$f":"Cout2","v":390},{"$f":"Vout*1.1","v":35.200000000000003}]
["Step 10 VIN UV Shutdown","Select \"Yes\" or \"No\"","Yes",null,"CCOMP","Compensation capacitor",{"$f":"Ccomp","v":2859.6492281029168},{"$f":"Vout*1.1","v":35.200000000000003}]
[null,{"$f":"IF(C39=\"YES\",\"UV Voltage (V)\",\"\")","v":"UV Voltage (V)"},4.5,null,"CHF","Compensation capacitor",{"$f":"Chf","v":28.596492281029168},{"$f":"Vout*1.1","v":35.200000000000003}]
[null,{"$f":"IF(C39=\"YES\",\"Ruv2(kΩ)\",\"\")","v":"Ruv2(kΩ)"},54.9,null,"CVCC","VCC bypass capacitor",{"$f":"CVCC","v":0.61688311688311692},"16V"]
[null,{"$f":"IF(C39=\"YES\",\"Ruv1(kΩ)\",\"\")","v":"Ruv1(kΩ)"},{"$f":"(1.2*_Ruv2)/(Vin_UV+(5*0.001*_Ruv2)-1.2)","v":18.430549727234578},null,"CBOOT","Highside Bootstrap capacitor",{"$f":"Cboot","v":61.688311688311693},"16V"]
[null,null,null,null,"CDITHER (LM(2)5088-1)","Dither Capacitor",{"$f":"Cdither","v":"NA"},{"$f":"IF(OR(Controller=\"LM5088-1\",Controller=\"LM25088-1\"),\"5V\",\"NA\")","v":"NA"}]
["Step 11 Feedback Resistors","RFB1 (kΩ)",1.62,null,"CRESTART(LM(2)5088-2)","Hiccup Restart",{"$f":"Crestart","v":11.666666666666666},{"$f":"IF(OR(Controller=\"LM5088-2\",Controller=\"LM25088-2\"),\"5V\",\"NA\")","v":"5V"}]
[null,"RFB2 (kΩ)",{"$f":"_Rfb1*((Vout/1.205)-1)","v":41.400746887966804},null,"RFB1","Feedback resistor",{"$f":"_Rfb1","v":1.62},{"$f":"IF((Vref*Vref/(_Rfb1*1000))<0.0625,\"1/16 W\",\"1/8 W\")","v":"1/16 W"}]
[null,null,null,null,"RFB2","Feedback resistor",{"$f":"_Rfb2","v":41.400746887966804},{"$f":"IF((_Rfb2*(1/1000)*(Vref/_Rfb1)^2)<0.0625,\"1/16 W\",\"1/8 W\")","v":"1/16 W"}]
["Step 12 Compensation Network","Bandwidth (kHz)",20,null,"RUV1","UVLO divider resistor",{"$f":"IF(UV_Selector=\"Yes\", _Ruv1, \"-\")","v":18.430549727234578},{"$f":"IF(UV_Selector=\"YES\",(IF((Vin_max*_Ruv1/(_Ruv2+_Ruv1))^2/(_Ruv1*1000)>0.0625,\"1/8W\",\"1/16W\")),\"-\")","v":"1/16W"}]
[null,"RCOMP(kΩ)",{"$f":"(_Rfb2*6.28*Fbw*Cout1)*(10*Rs*0.000001)","v":27.827703749085039},null,"RUV2","UVLO divider resistor",{"$f":"IF(UV_Selector=\"Yes\",_Ruv2, \"-\")","v":54.9},{"$f":"IF(UV_Selector=\"YES\",(IF((Vin_max*_Ruv2/(_Ruv2+_Ruv1))^2/(_Ruv2*1000)>0.0625,\"1/8W\",\"1/16W\")),\"-\")","v":"1/16W"}]
[null,"CCOMP(pF)",{"$f":"10*1000000/(2*PI()*Fbw*Rcomp)","v":2859.6492281029168},null,"Rs","Sense Resistor",{"$f":"Rs","v":26.578073089701004},{"$f":"IF(Iload*Iload*Rs*0.001<0.25, \"1/4 W\", IF(Iload*Iload*Rs*0.001<0.5, \"1/2 W\", IF(Iload*Iload*Rs*0.001<1,\"1 W\")))","v":"1/4 W"}]
[null,"CHF(pF)",{"$f":"IF(Chf<47,\"47\",Chf)","v":"47"},null,"RRT","Oscillator Timing resistor",{"$f":"RT","v":24.473684210526315},{"$f":"IF((Vref*Vref/RT)<0.0625,\"1/16 W\",\"1/8 W\")","v":"1/16 W"}]
[null,null,null,null,"L","Inductor",{"$f":"L","v":47.407407407407426},{"$f":"Ipk_load*1.1","v":1.9965000000000006}]
["Step 13 Soft Start Capacitor","Soft-Start Time (ms)",1,null,"RRamp","Optional Ramp resistor",{"$f":"IF(Vout>5, (VCC-Vramp)*1000/(Ios-25), \"NA\")","v":51.880767811000375},{"$f":"IF(G52=\"-\",\"-\",\"1/16 W\")","v":"1/16 W"}]
[null,"Soft-Start Capacitor Css (uF)",{"$f":"(10*tss*0.001)/1.2","v":8.3333333333333332E-3},null,"RCOMP","Compensation resistor",{"$f":"Rcomp","v":27.827703749085039},"1/8 W"]
[null,null,null,null,"D","Schottky Diode","Voltage Rating",{"$f":"1.1*Vin_max","v":39.6}]
["Step 14 CBOOT & VCC Capacitor","FET total gate charge QT (nano Coulombs)",19,null,"Q","MOSFET","Voltage Rating",{"$f":"1.1*Vin_max","v":39.6}]
[null,"CBOOT(nF)",{"$f":"Qg/(0.04*7.7)","v":61.688311688311693}]
[null,"CVCC(uF)",{"$f":"IF(CVCC<0.1,\"0.1\",CVCC)","v":0.61688311688311692}]
[]
["Step 15 Dither Capacitor(LM(2)5088-1)",{"$f":"IF(OR(Controller=\"LM5088-1\",Controller=\"LM25088-1\"),\"Cdither(uF)\",\"NA\")","v":"NA"},{"$f":"IF(ControllerSelect=\"Dither\",(2500/(Fsw*1000*0.12)),\"NA\")","v":"NA"}]
[]
["Step 16 Restart Capacitor(LM(2)5088-2)",{"$f":"IF(OR(Controller=\"LM5088-2\",Controller=\"LM25088-2\"),\"Allowable current limit overload time (ms)\",\"NA\")","v":"Allowable current limit overload time (ms)"},280]
[null,{"$f":"IF(OR(Controller=\"LM5088-2\",Controller=\"LM25088-2\"),\"Hiccup Sleep Time (ms)\",\"NA\")","v":"Hiccup Sleep Time (ms)"},{"$f":"IF(ControllerSelect=\"Restart\",(Crestart*1000)/(1.2*1),\"NA\")","v":9722.2222222222226}]
[null,{"$f":"IF(OR(Controller=\"LM5088-2\",Controller=\"LM25088-2\"),\"Cres(uF)\",\"NA\")","v":"Cres(uF)"},{"$f":"IF(ControllerSelect=\"Restart\",(50*n)/(1.2*1000),\"NA\")","v":11.666666666666666}]

{"sheet":"Power Dissipation","index":1,"n_rows":14,"n_cols":12,"rows_kept":14,"cut":false,"hidden":false,"merged":[]}
[]
[]
[]
[]
[]
["Assumptions"]
["Ambient Temperature",85]
["Package RJA",40]
[]
[]
["VIN",{"$f":"Vin_min","v":35},{"$f":"Vin_min+(Vin_max-Vin_min)/10","v":35.1},{"$f":"Vin_min+2*(Vin_max-Vin_min)/10","v":35.200000000000003},{"$f":"Vin_min+3*(Vin_max-Vin_min)/10","v":35.299999999999997},{"$f":"Vin_min+4*(Vin_max-Vin_min)/10","v":35.4},{"$f":"Vin_min+5*(Vin_max-Vin_min)/10","v":35.5},{"$f":"Vin_min+6*(Vin_max-Vin_min)/10","v":35.6},{"$f":"Vin_min+7*(Vin_max-Vin_min)/10","v":35.700000000000003},{"$f":"Vin_min+8*(Vin_max-Vin_min)/10","v":35.799999999999997},{"$f":"Vin_min+9*(Vin_max-Vin_min)/10","v":35.9},{"$f":"Vin_min+10*(Vin_max-Vin_min)/10","v":36}]
["IC Power",{"$f":"B11*(7*0.001+Qg*Fsw*0.000001)","v":0.41125},0.41242500000000004,0.41360000000000002,0.41477499999999995,0.41594999999999999,0.41712500000000002,0.41830000000000001,0.41947500000000004,0.42064999999999997,0.42182500000000001,0.42299999999999999]
["Delta TJ above TA",{"$f":"B12*RJA","v":16.45},16.497,16.544,16.590999999999998,16.637999999999998,16.685000000000002,16.731999999999999,16.779000000000003,16.826000000000001,16.873000000000001,16.919999999999998]
["Junction temperature",{"$f":"TA+B12*RJA","v":101.45},101.497,101.544,101.59099999999999,101.63800000000001,101.685,101.732,101.779,101.82599999999999,101.873,101.92]

{"sheet":"Bode Plots","index":2,"n_rows":31,"n_cols":21,"rows_kept":31,"cut":false,"hidden":false,"merged":[]}
[null,null,"Frequency (Hz)","Frequency (rad/sec)","Modulator\nGain\n(dB)","Modulator\nPhase\n(deg)","Error Amplifier Gain\n(dB)","Error Amplifier Phase (deg)","Overall Loop\nGain\n(dB)","Loop\nPhase\n(deg)"]
[null,null,0.1,{"$f":"2*PI()*C2","v":0.62831853071795862},{"$f":"20*LOG( DC_GAIN_MOD/SQRT( (D2*Rload*Cout1*0.000001)^2 + 1))","v":38.090704240968293},{"$f":"-ATAN(D2*Rload*Cout1*0.000001)*(180/PI())","v":-1.5463837378031238E-2},{"$f":"20*LOG(SQRT((D2*Rcomp*Ccomp*0.000000001)^2+1))   -   20*LOG((_Rfb2*Ccomp*0.000000001*D2))-20*LOG(SQRT((Rcomp*Chf*0.000000001*D2)^2+1))","v":82.569983828078861},{"$f":"ATAN(D2*Rcomp*Ccomp*0.000000001)*180/PI() -90 - ATAN(D2*Rcomp*Chf*0.000000001)*180/PI()","v":-89.997163858916494},{"$f":"E2+G2","v":120.66068806904715},{"$f":"F2+H2+180","v":89.98737230370547}]
[null,null,0.2,{"$f":"2*PI()*C3","v":1.2566370614359172},38.090703291905839,-3.0927672503190621E-2,76.549383947368071,-89.994327717847298,{"$f":"E3+G3","v":114.64008723927391},{"$f":"F3+H3+180","v":89.974744609649505}]
[null,null,0.5,3.1415926535897931,38.090696648474491,-7.7319141832760466E-2,68.590584001909122,-89.985819294868932,106.68128065038361,89.936861563298308]
[null,null,1,6.2831853071795862,38.090672922016928,-0.15463800205801612,62.569984902850088,-89.971638591528347,100.66065782486702,89.873723406413632,null,null,null,null,null,null,null,"Additional Definitions"]
[null,null,2,12.566370614359172,38.090578017482876,-0.3092737512929169,56.549388246451315,-89.94327719738061,94.639966263934184,89.74744905132647,null,null,null,null,null,null,null,null,null,"UVLO Selector"]
[null,null,5,31.415926535897931,38.089913743807593,-0.77314495796261318,48.590610871108176,-89.858193244119221,86.680524614915768,89.368661797918165,null,null,null,null,null,null,null,"RLOAD",{"$f":"Vout/Max_Ave_Iload","v":21.333333333333332},"Yes"]
[null,null,10,62.831853071795862,38.0875421668987,-1.5460084606478253,42.570092378628559,-89.716388278696201,80.657634545527259,88.737603260655973,null,null,null,null,null,null,null,"DC GAIN MOD",{"$f":"Rload/(10*Rs*0.001)","v":80.266666666666637},"No"]
[null,null,20,125.66370614359172,38.078068788692676,-3.0897689614115809,36.549818133282152,-89.432790880248731,74.627886921974834,87.477440158339689,null,null,null,null,null,null,null,"VCC",7.7]
[null,null,50,314.15926535897933,38.012327513639484,-7.6854902914547951,28.593296951701923,-88.582227760415208,66.605624465341407,83.732281948129994]
[null,null,100,628.31853071795865,37.785341833212001,-15.103961482368577,22.580826544408719,-87.166242661257471,60.366168377620724,77.729795856373954]
[null,null,200,1256.6370614359173,36.980187560776429,-28.359719498011238,16.592593298826742,-84.346702622914862,53.572780859603171,67.293577879073894]
[null,null,500,3141.5926535897929,33.586548678272955,-53.460472836107776,8.8538459744054112,-76.10699568244182,42.440394652678364,50.432531481450411]
[null,null,1000,6283.1853071795858,28.908133364177576,-69.669595646074853,3.5389753750398283,-63.721425333199086,32.447108739217406,46.608979020726053]
[null,null,2000,12566.370614359172,23.299661242562145,-79.504527640930149,-0.44075041218584465,-45.572938697683483,22.858910830376299,54.922533661386367]
[null,null,5000,31415.926535897932,15.463628502830195,-85.761961258816299,-2.8087496964216001,-23.233505670516461,12.654878806408595,71.004533070667236]
[null,null,10000,62831.853071795864,9.4608535638820381,-87.878078252998861,-3.2911265159914271,-14.172337700131962,6.1697270478906105,77.949584046869177]
[null,null,20000,125663.70614359173,3.4447213489356527,-88.938675209983288,-3.4506160960570305,-11.421186274999272,-5.8947471213777192E-3,79.640138515017441]
[null,null,50000,314159.26535897929,-4.5128270449214298,-89.57542929312163,-3.7069623246169816,-16.326853510565009,-8.219789369538411,74.097717196313369]
[null,null,100000,628318.53071795858,-10.533248103089214,-89.787711732351184,-4.4179793955529494,-27.710814015253092,-14.951227498642163,62.501474252395724]
[null,null,200000,1256637.0614359172,-16.553803301439952,-89.893855501888126,-6.4604817799282159,-45.572938697683469,-23.014285081368168,44.533205800428391]
[null,null,500000,3141592.653589793,-24.512590954618112,-89.957542159954741,-12.053926675205753,-68.427772409402294,-36.566517629823863,21.614685430642965]
[null,null,1000000,6283185.307179586,-30.533189079285847,-89.978771077063044,-17.600332204020681,-78.804658932217578,-48.133521283306528,11.216569990719393]
[]
[]
[]
[]
[]
[]
[null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,{"$f":"(Vout/Vin_max)/(120*0.000000001*1000)","v":7407.407407407406}]
[null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,{"$f":"(1-(Vout/Vin_min))/(0.00000055*1000)","v":155.84415584415589}]