# DCR measurement for PDN rails

Source: [https://docs.qualcomm.com/doc/80-PV086-5P/topic/DCR-measurement-for-PDN-rails.html](https://docs.qualcomm.com/doc/80-PV086-5P/topic/DCR-measurement-for-PDN-rails.html)

The FTS bucks are high-current regulators that use remote sense to help achieve low DCR PDN
      specifications on the PCB.

The bulk capacitor must be placed close to the load, and a corresponding sense line must connect to the domain at the bulk capacitor.

![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAArkAAABvCAIAAABnxE/4AAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsMAAA7DAcdvqGQAABLwSURBVHhe7Z1PaCRXfoB7dx0zG8wwg8EeWMg2PmTFQrKaHSS8DbOWD4t1yEGHsd0xsTW69BiMbUEOFuigw4DE4IP6EDOsUTAsBoEO0q1FYGCSky4ZlDksJvRBhxz6ZhEM6ZBs6Pzev6pX/1otjapaVfV9/Jh59eq9VzXdr/v39avqnsYIAAAAIBtcAQAAAMaBKwAAAMA4cAUAAAAYB64AAAAA48AVAAAAYBy4AsDl0e+2GiGdnq1WeLta3b6tvAi9TnRgQ6/7QoNmkH6sK0WvE3045XE+65TzeawAqkypXCH6RmzfceXdLNwI2mS8G9vGlla3Fx0xfF+UNyBT82Jv61AzIolKZlswffyymqOXnYHjGbM+nN8V6vtYAVyY0rmCe5X3VdpXGy79mx1WFcL35SiuUwR/WENQk9oeIItoopItM3uCQipqb0vmre3pZrSeeW7DG1WqOr1ovd3SG0F3u8+NrnAnIXWmIpzm4ZZPyrFCZJROx+yTjraVGyI5ZlCjBkqOqUazGyaZ+w9L9mhyBkGdxjsrM3qsr93sdN3xpMLtcSOldwmO7s7Mq4LqIlPbvVwaMmdiU0TT6rhpkFHvVXszRiaStxkcx3sh6G3F9OdZNVxBv3DVhm7hNlJwnSJEnzCFqpGqXn/aTw+UDJk57nWucNknVh1DTbdgt0xRV7bTUE/CfjgXVYsgQbr65JGkpKvc32k1uiivF++I0fNMPZZDWtue6nUVlFQh+q9QxXBoc8zEmN6xzT8mMnxstLBGSu4fYwi76VaiDbG+dvhwKDkZWzADxQ6XHEH+cqcfPpRQTWQ26Fygyn29EK1ng6oOp0W4kV4v8yQ2Te1YYT5STXTjsG1KrylS4msQVtnMU6meFHlUZSMomz5RVOOA8BlNPiOhSso0sXUAZyFzyU0rIdwK8pCh37OfTjTSLNgbneMyyd1HjbC7TGL5cGPbufrwAN4Iuio8CdcoejLxI3q7Mo7lCEcOS7pD+pheZXj1LxwzHMOeoFQkOiqk0msb+9eo1sFnPHU2UXRT10OPoprLyajVEztO7HAxVCPv8PGjQ7XQkyGYa4KqUE+5mlqu3m+UXh9ORDtzZJcksK68ut388TtaEr2mSmnXFQLU4ymV+i/5hOSK6S/g1F2pw2qM+mWMBZBA5lL4qpbZFmxIOZhH8Qmn3jeCzdTkE2vhvxnZetvNa+iK8rdrnmykBhs3w1OP5QhHDku2Q+Jf4fVOL3pl+1j5FUErS3he/hAar0K1il+iEILhVFP9kUOEQXDtYodLHl36uUcluROqhDzV0ZeHq5C5FSIzzs6HaL17aak8oks6Obm5ExldFc2auPxlWmT1mhKVcQX3HMkj6mpSSN2VOh1kIPUkeYtLAGeip05AZOZ4u2JTUPb4NXYmR/GGkv1qXTxarzvJKOFR1JKE2is1YSN7HO9c1D7/iN6BhNRjOcKRw5LqoEvxMaMnZouRMYMWNr/LdvCwJM/Q1cjbq//g6WHsW65tmuirK3QndUhX5Y8S6xIfQbrpXrpl9OhQLfSk1E+28kn7+lJPuZoTei7oyeGmg5k6wZbMjtiLXfUPa/wt01HKKUkn2mtKVMcVdEE/xEFNktRdKcPK02XfbcKbVgAAoF6YnCFJ3FiBygku3diErutdcvfq1YZJLbpS9cpeV9DlqCtk9ZoSpXIFAACAIpFUbT85NvR98zqjx5xA9pktXQwJ19vch0+rBprox9TgE6q/aqUror2mRHVdQT0NMa7CAw4AAGVFEks9EwnrCgAAADAOXAEAAADGgSsAAADAOHAFAOgFv1cQY6L/Zsncwm03Lkgv9uXD6P1G3GoEMF3SXeHo6OgpXHkGg4F9wgByIZ7BU1GikfKTR+cjxRXCitreTwYpHB8f23dAyAf7QEdJcYWDg4PXXn/9N3d/S1zl+PXc/F//6lf2OQPIQvJs8HNK4XexzHZQo9cVVEZ2v2KkU7NtJm1ch7TVA5Pl9Qi2JiR+oKxDJGUj5gr8zAloRBRu3HhlYeGviJyi2Xxte3vbPtweKa7wzTff3Pvg7/rf/0Bc5fjnf/vjX/z85/Y5A8hCkq7L4jafe2ndFfXfYXoOSvbTfvChP/7fR+mmgQa4UR1hlRswGNiUusGZyAnYHRbZbyzCEh8b6ol86pV8Nhr9nsgpNjb+ZmNjwz7cHrhCWQNXgIkIE7bN+X5FKAPGFdwOJwfub5e5o/lckI4eid1extf7oofomF+hdpuRztLSq3BOA3UHV8g7cIWqBa4AE6HStc2zNuN6idcV9d/RRK4TdTSDR/O3IprDo1t+c1eMHSJcV0gMHa2IjQy1BVfIO3CFqgWuABOh0vPE9yv4iVwlat3Q/DfvmmjCTiR4ae5XyH7bL/M/snJnom5jiAwV9tUE5xltBXUDV8g7cIWqRWlcIZFQoFC89AxQdnCFvANXqFrgCjARuAJUCFwh78AVqha4AgDUDVwh78AVqha4AgDUDVwh78AVqha4AgDUDVwh78AVqha4AgDUDVwh78AVqhZlcgX7vTcN99kBlIJ+d9To2PJUUCfQCEN/4sAV8g5coWpRGlcAgDLSaYw6HZOhp4O4Qqtry6P+qNWSP3CFvANXqFrgCgCQGz2dp3vTXFqIuUJHlXGFvANXqFrgCgCQF92WeEKkUDyxaxDaWnCFvANXqFoU7wrffffd48eP5bV6cnJiqxIcHR2ZNqenp7YqynA4PDw8lDkmbWxVgsFgsKuR0WwVABRHL5Kkww/3xRJZV9DXRHq4Qu6BK1QtinQFye43btyYmZn5+OOPFxYWms3m4uKiqIPdrdna2rp27dqbb75p2kh7KfjGIOX79+9LG+krBdNGetndGhlTRrh161ZbY8oHBwd2NwAUQK8z8u9B1kl6CuAK0whcoWpRmCtIypfsHlsnEHuYnZ01awOyS5L62tracDg0ew2PHz+WNmYR4vj4WFRDppbZZZCO0ksGNx1lr7SPrSUMBoOlpSU5B7sNAPli7yIMEXWYytJC7BqE1hdcIe/AFaoWxbiC5PusPC1ZXFK7/Nlut3d3d21tFEn8CwsLRiZEF2xtlO3t7dXVVVEKkYmYbQTcv38/5hkAUENwhbwDV6haFOAK4gGSv2MrCj6iCNJgcXHRbqextrYmbcQG7HYaYhLSZsy1BnGIW7dujTkTAKgDuELegStMMZ6vzzXae17N3kpj7tGT7394sjlvf6GoYRvsLM+vP9Ntnj263fDKur3trqMAV5DkvbS0ZDfSkOQtZ769vW2305DXtrQZf5eiTM1r167ZjQzkTLhxAaDmJFzhYbfV6PSCzd+Pencbrff6/ff8n4ALG2TVEy5whamGyMHyfrC5s6zNIGIA4hPKDMQejDSowvLK7c3nau+eK3hRgCtsbW2tra3ZjQyazebh4aHdSGM4HMprcvySgLn7wW5kINM3dQYDQH1IWVcQOeh8Gmz2OtoAxAnCyk87jTe6fV3Oqidc4ArTDasCqhwogr9yEIRUaqvQCwz7bd0yXGzwogBXmOQugay7EHzObCM+EftWRRJcAWAKnJyMZmZG16+PvvrK1kyR09P//OUv//vHPx599bdeenvYbXkq0HqvbwqeQPS7b7S6D22D1HrCBa4w5XiyOW/WBoKCjv22WQsT7MKD8QPzpxjGyo79044ThLjCzZs3TQYdw/r6+ocffmg3PB48ePD555/bjQzu3Lnz9ddf22kxbeRs33rrLXtmGSwvL3/xxRd2wyPrQQCA8fzrnTt/+tGPRo3G/7700sP1dVs7Jf7l7t3/0yczun5tNPgySG9Bys9yglHv7hn1hAtcYdphlxPSE7/EznLDOMTO8sqOu+igL0nst73rF0GIK7z66qvmJTSeTz75xJY8JPWmplWfd9999+r8GtK33377/vvv2zPL4LPPPhMtsBtRUh8EABiPpOc/6a8s/tdPfzp1V/in3/3uf37yE+UK1/5sNPyHMMPZ5YSH3dbdXlATXT+wtyZk1RMucIXph7qUsOnduODucHR77e2NauFhzt61IIbRnvPXIcIo4BoEANScvT/84R9feunff/az0QRXG3NnOPyPe/f+eP3PR0//Ppbhep03ul3vxoWIE3zaaaQ6hFdPuMAVrkCIHERvUBAtsBcgGnZRQYW6jyFYe9hvJ+9p0IErAEB+PH36dHZ2tt1u37t378z7lgoj8zuTvbsN/0ZFcQL7zqrgexCTB65QtcAVACAPjo+PFzTmruQr9Utoma5AXFLgClULXAEALpeTk5N2uz3rfr7dgCvUKnCFqgWuAACXxWAwWF1dbTabyd9rxxVqFbhC1QJXAIAX5/T0VHLDzMxM1g+w4gq1ClyhaoErAMALIn4gliC5Ycwvq+IKtQpcoWqBKwDAhdnd3W02m6urq4PBwFZlgCvUKnCFqgWuAAAXQNKt+TLkycmJrRoLrlCrwBWqFrgCAJyL2JchJwRXqFXgClULXAEAJiT1y5ATgivUKnCFqgWuAABnYr4MOTMzk/wy5ITgCrUKXKFqgSsAwBiGw6G86ZsvQ0rZ1p4fXKFWgStULXAFAMhC/KDZbMqb/pgvQ04IrlCrwBWqFrgCACQ5ODiY8MuQE4Ir1CpwhaoFrgAAPpJHZ2dnl5aWJvwy5ITgCrUKXKFqgSsAgOH4+HhxcfG8X4acEFyhVoErVC1wBQAIvgx5eHhoqy4bXKFWgSsUFs/X5xrtPa9mb6Ux9+jJs0e3Gx7L+3ZvrL4R9FXjBEQG1IErANSZF/8ypHBwcGDfYl6YPJY0kuAKeQeuUGCIHAQq8P0PO8s604sThJXiAfPrz3RZ6sUkXGOvge8H++2Ga+8CVwCoJ5f1ZcgygivkHbhCkZGmAudyhahtpAauAFBDLvHLkGUEV8g7cIVC48nm/O3N535BOYFdq9NkXoNY2ZHKvRXby7sSEbsMgSsA1IpL/zJkGcEV8g5codiwqwWS6XXuNzXWD/bb/kLCZOsK4hxJV3j55ZetRwBA1Xn77bcv98uQZUQegRs3rttHBPJBrNQ+3B64Ql6xszy/vuml/NAVoiqQ6gp6OcEtLdhN1hUAAGAq4Aq5hQiBf0Oi7wr6hsf0axONUBGkTUBMFCRwBQB4QUr3PQiYFrhCWQNXAIACuFK/rwDTAlcoa+AKAFAAuAIIuEJZA1cAgALAFUDAFcoauAIAFACuAAKuUNbAFQCgAHAFEHCFsgauAAAFkO4K/W7LfgGi0er2bSVUF1yhrIErAEABpLlCrxMagrKGTs+UobLgCmUNXAEACiDpCmIHrCXUDVyhrIErAEABfPDBB0lXYCGhbuAKZQ1cAQBy5fT0dGNj45VXXvnyyy9tlaHXiawr9Hs9vaXWGzoGVdHvdmwrdZki7OHq5W/dDsoArlDWwBUAICeMJZj//Dq5rpC8X8FsBHLQEwnwNr0mZkvqtSjYCigBuEJZA1cAgEvHtwQpS83k34Nw6wry5/h1hZbC7YRSgCuUNXAFALhEkpZgmPz3FUI50AsL4dJByrpC4kIGXG1whbIGrgAAl0KWJRjO4wrB/QpdLQmiA3qr1ekGu/TlByMJ0p7rEGUBVyhr4AoA8IKMtwTD5K4AFQZXKGvgCgBwYSaxBAOuAAKuUNbAFQDgAgyHw62trUkswYArgFBzV3i+Ptdo73k1eyuNuUdPnj26be/w1Szv272x+kbQV40TEBkwCNV3Zcdt7iy7ZhcdE1cAgHMhlrC9vS2WsLa2NoklGHAFEGq/riByEKhAkMIlf4eVkrPn15/pstSLSbjGXgM/l++3G669H6rvfDBsxBUuNCauAAATEljC6urqYDCwtZPxzjvvPHz40G5AXeEaRJoKnMsVoraRGXrMJ5vzxgDOcIUJxsQVAOBMzmsJ0tguZmYzOztrW0NtwBV+kPx9e/O5X1D5274oNEHajtWbawp7K7aXXgwweEsCLrQr6BUC1Sv7GsSkY4or3Lx5cwMAIIOPPvrovGsJ4hZLS0uHh4d2O8rp6enCwsLx8bHdhtqAKwSf7CUru/sJbF6X8n7b/9BvW7pNE4k1gGDxIBLBmLr9edcVkmPiCgAwngcPHpz3ioOQpQuIQp3BFVTsLM+vb3rpOXSFaNpOzev6o79bBrCb41xBLyqE6wQXHZNrEACQE0ldQBRqDq6gQ4TAv3nQdwWd2tOvTTTCdG7SvyFFFCQiY+63fVew/SwTjokrAEB++LqAKACuUNbAFQAgV4wu7O7uIgqAK+QTidWCyLrFZQSuAAB5I7rQbrcRBcAVyhq4AgAAFAOuUNbAFQAAoBhwhbIGrgAAAMWAK5Q1cAUAACgGXKGsgSsAAEAx4AplDVwBAACKAVcoa+AKAABQDLhCWQNXAACAYsAVyhq4AgAAFAOuUNbAFQAAoBhwhbIGrgAAAMWAK5Q1cAUAACiGFFc4ODh47fXXf3P3t8RVjl/Pzf/lL35hnzMAAIDcSHEF4ejo6ClceU5OTuwTBgAAkBOj0f8DtVrdh1bVWDIAAAAASUVORK5CYII=)

The HF buck regulators use a local sense setup, which means the bulk capacitor for the buck remains adjacent to its inductor.

![](data:image/png;base64,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)

The LDOs do not have any external sense nodes. The LDO DC resistance should be measured between the LDO pin on the PMIC and the load pins on the SDM.

![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAArkAAAB7CAIAAAD/gw91AAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsMAAA7DAcdvqGQAAA9kSURBVHhe7d3PiyTlHcfxOcyyOeYQPBk0IiLiQQVFm+w6CsFBctCLLASyK0IZAgshOTigyQqCsIRgsyQxirA5BBcMegihT8LkHxDx3OewkEP2EHA1OUy+z+/v81R1b8/O9NPzTL1ffN196qmnnmp7uro+W9W9u3UAAACwGFkBAAAsQ1YAAADLkBUAAMAyZAUAALAMWQHYqFm3lUymc99tzacTv6Kb+a67IdMUE3uzbrj/aBbu7kQxz232rN75Ya/n6QJaQFYANkqyQjxlZecvsxDOTTJoDaepNk7qa3L4rDDqpwtjR1YANkpnBb2Un5nm89lcn6bM2q4zVx3s8HhxIm3sO8wcfqq8My5mC2EGWe46P2l8eMWgcqeBDBvYXWDWukcu/TM3Jg3ozVnsU3f4nfiNQyvNP/wg/fZ2TPbA04bq/yhtPvX7lZ2kndr16YFNptPec1I8ABnVf2KBE4+sAGyUnEvUOSOdhvL+koyLZ9j81GU2StvalhtQdMrvccP+Xs38bnTcTBp+kFk5EflOo0W7c+zGZkvdcFPFRtwm9YRJimnTgNCS35c8M2at3d40wkxO6gmDis0lLRT7ku74PNjN457T7vo9fre+A2gCWQHYqPyUkU4uy08l6iRkRiqm2523hJvBDS46Y39su7XF+Tu29GDR32nkRsYJi/+LOE+/MThnnCc+MLek/9d0K/UMTFiszB6amdl3+GHF5p0EA79xHCC/uk8xmJ5JeKTWwAx+nJsktYCTj6wAbFR+ykpLy08lem150gtkjD1FqT8Qq07ZIk5iTmluCmnZrjR/aKUea9FOhR4p7bg7J67tN/pz9h+YE6dN/2v9Rz4w4bKVZk7f4YcVI/TGtj2bTsx6ExakaW9A5LvrPwA1iZ4OOOnICsBG6dOJnD7yhXAykUH6VJmfaNJAv72eRrZ0fyA2Hw3QnbJBnCQ+hrifNL8e5LvsMOEW9d4su8XA7pw432CjmLP3wMIK35c+dRC3jbPpzrhd2t7MGGayzKo0VxisNteRy/SIMLyTx+EupfR31+vxk6QWcPKRFYCNMuesqDh5pHXlWaU40cSB9uSlO8yWYXBvOtth2mGN/djdwlOaNN0wt5veTr2Fu7PifP2GKOfsPbDetH4x3iHQs4lyQrPeLps7BtkDNxua6GHEFdnmdiFMbubxbdXs7a7sSQ8vtYCTj6wAAACWOclZIQZyY9LZCG4SvF2MgTz0ZH9E8OwMekUYbE26mUr1c3PH0a+YTPUaAADG7KRnBXWRz7bjyT6EhdixelaI1wLTLH5k2Fm5GQAA49VIVohnfXeyN/cu3Rqz7P5qk8NmhWx+vSuRDQMAYNSavK7QzcIqs+j/rrTDZ4W0kHUbRXYAkJNjZvgIWfUfTZBj7MiHmDlwswPfHslRtgo4On2r2l+HLl917ssxQ/3p5W7PTF56ldrxbtH8rR12bbxTPrxJRQ19XsE+Zf7ZtL+572XJ+40dOPT09VaoH4ZeyLoNsyFZATg0OZZWOXJkmPkO4tBRewjmwM2myPYuRzEHMY6RPaH415Q97bi2Pn/oc86i/myFZ0KIjHDdcb3bhxk4sEllrdyDCMIzZn83zIDsx6D1VmRPuJq/2NXmfy7A5sjrv/ftweyIc8vSkl/dLUBhRoZRZlDcQh9anhxwMtxs3TvK0mZuXbkL32cW7YPMZpAVaWerXuEAVrLoNBEbodMP0v3ZtmahfN3aF7iQfr1d0NukulazQnhy7XozcPB57K1QPwQVC4UdqX/CG/65AJtjjgB3MJhWONzcESFHil0lPfJ71m8brl916FbQGxylHjXGb97rMQ2/zrM9SbYOOJLey01ekPZg0CtMX2gXr8b4Ulf98ft9XTeLF8jN+vA3husL6o6+l1FTs1nBP3m2qX88GbtCiX9YsuKdIIvvTAKOHFvhwPNNOZLCAeabbkUaGVqxRxrucOodmWmjOJsWN9ShxK8wrWWb63VmZVoAjsi+MPXLTV5gKSsE6lSuN3Bj3ELYznVmL1g7xP6eD1i0SUUnOSsA2AR5PwrvRr4pb1XhTdI33Yo0MrTUtoYsmjfQuLWw74SaHm9WxjfUYkLf0ntQj8vK916uBY7CvDjVa9J+wsC/It2r1jbSCzD29xaCvNPMb5ZUb+hKBuep4bRkBfsE5tR7BoDVmaPJHT6mZd6Xwu/2zcuukh753f3qt1H9eou0TVgo3/vSyrTWvElmEw5NbQYtnqzcE3A05vVmX5XudkE4y5gXpH+p2WZ4Cap+vSI1s9F+ejPe9GczL9ykIq4rAMjJ+9Hizzam9z55x3K/pmVpxPdT17LSe5sMCzNGMi71hY3iPwAxsAvTsoOG/k0Hu8IJq7IdAHcvu1Ut/9n72PZVp15sYSF/NWZHQbgZnh0NelP1nUm7bsEmFZEVAOTSSRnAQuaMvqEzd31kBQA5sgKAHFkBAAAsQ1YAAADLkBUAAMAyZAUAALAMWQEAACxjssJ9993vvriJJvzmyhX3wwOA0bpy5S3/noh1uv/+78uzbbKCLMz//R+qibr6+z/99OJFe6QAwHhduvST69flzfADaq0lCUGebbJCY0VWAABBVqhTZIUmi6wAAIKsUKfICk0WWQEABFmhTpEVmiyyAgAIskKdIis0WWQFABBkhTpFVmiyyAoAIMgKdYqs0GSRFQBAkBXqFFmhySIrAIAgK9QpskKTRVYAAEFWqFNkhSaLrABgROZTOUWlmvluQVaoU2SFJousAGBEJCtMpr4tSWFrcjD3C2SFOkVWaLLICgBGpMgKqU1WqFRkhSZr1azQbR1MQ/wGgEYV9yC6dBOCrFCnyApN1kpZQY6uTsJ45xcBoFHcg9h0kRWarJWyQmc/ATSd6M8BAUB7sqwQ3twsskKdIis0WStkBYne9opCcYwBQHPK6wrpcilZoU6RFZqsO2eF6SR9UkFlcABoj2QFOVfFUm9oZIU6RVY43vrqzSe3Hn/3K935+btPyXObufiZX/vJq77HeOrNL+JWZp5A9/u6U1aQ3K2OKykuLQA4jXpZ4Z3pZGsyfUf1fDCfPuDfTb0HpvOwdnbO9xmqn8pLnh15tskKx1dy+n/y6uepx5z1L7x79fHU+dmFePqXwTE3pMoDh8kTr36U1pq6Q1aYdfpzwpLJDybpo0AAcGoMXFeQ0//klXnqMemh685tdZd9z/yVyda5mWvL4MF+Ki+ywrGXnOnVlYAvbEpwv4YxH13cuvCJbQ9mhTJtyPjy0sLSrCDJoPfdhzI9AMBpMHQPQsKBukIgCUCig84EBx/Muq1uZtuL+qm8yArHX+amQ0gAEgvMFYIsK+TXFaIwQDYv7mL065OfX/7z008f3LplDxYAGKXbtz/64TP/+Nn54sRmbjqEBCCnf3NLIs8EMsDfp1jUT+Ul5yh5vskKx1uSBtxdg9CQrGDzgJPdX+hdV9BZQaKG469D2PrX1d9+e/bst9vbBw8/bA8XABilF174Znv7f2e3Dy4/l5/bLnf+bkJokBWOVnIakuebrHDM5e4ypAsM6bqCuqggteo9iCwrfH3uvPy0pL7Z2vquTRIAUMf29rZvnQBf23dCUz/4XnFuc3cT0gWGRfcaFvVTecmzTVZYQ5lw8OqF+MEFfQ/CXGMIn1UczArllykkXmRZ4Z9//ezbs2dvnzlz8OKL8oPDa6+99uCDD/oFAONx+fLXZ8789ztnDq5dKM5t9mMK57r4wQWdCfhs4+GLrLCmsl961PlAXSowdxbcov68Qh4I4t0Hofv92l+//cfz5+2xgoMPP/zw5Zdf9gsAxuR3P3ru72/Jn5rKc5v7+kP6QoRkgkR98nFRP5WXPDvybJMVGqsV/t7GEbl+/fqlS5f8AoAx4e9iqlNkhSaLrKCRFYDRIivUKbJCk0VW0MgKwGiRFeoUWaHJIitoZAVgtMgKdYqs0GSRFTSyAjBaZIU6RVZossgKGlkBGC2yQp0iKzRZZAWNrACMFlmhTpEVmiyygkZWAEaLrFCnyApNFllBIysAo0VWqFNkhSaLrKCRFYDRIivUKbJCk0VW0MgKwGiRFeoUWaHJIitoZAVgtMgKdYqs0GSRFTSyAjBaZIU6RVZossgKGlkBGC2yQp0iKzRZZAWNrACMFlmhTpEVmiyygkZWAEaLrFCnyApN1niywu3bt/fv5I033tjd3fULi928edNPCuC0ICvUKbJCkzWerHDjxo2dO3niiSceeughv7DY3t6enxTAaUFWqFNkhSaLexAAIMgKdYqs0GSRFQBAkBXqFFmhySIrAICQrLC3t7u//ytqrUVWaLLICgAg3n//Dzs7z1Drrpde+rE822SFxmo8WWGV70GsyH4PYj6dyCvd6GZ+FwCAVZAVGqvxZIVVvgfx6KOP3nvvvX5hsb291yUoTKZzO/Gsi00AwArICo0V9yC0Vf8upvl0ouLBfD6bkxUAYGVkhcaKrKCtmhVmHTceAOCukRUaK7KCRlYAgArICo0VWUG7u3sQkenunJmsnU87P8i24mJoyO92HACMDFmhsSIraCv/21HmSxDqs42+HdPATEKAWnStuBiWuDQBYKTICo0VWUFbOSsIExGceIkhXFeQX5dfV5gYYSUAjA1ZobEiK2iHyQoDUjiwFxbSpYMyK9jGrBu6jwEApx9ZobEiK2hHzgrx8wpTGxIkDtilibsl4dfG2xfSw30IACNEVmisyAraEbMCAGAVZIXGiqygkRUAoAKyQmNFVtDICgBQAVmhsSIraGQFAKiArNBYkRU0sgIAVEBWaKzIChpZAQAqICs0VmQFjawAABWQFRorsoJGVgCACsgKjRVZQSMrAEAFZIXGiqygkRUAoAKyQmNFVtCuXbv2/PPP+wUAwHqQFRqrMWeF/f39ndwjjzxyzz33+AVrd3f35s2bfgMAwHEgKzRWY84Kt27deuyxx9577z0JDdGnn37qW/v7lyw/GgBwTMgKjdXI70FIXNjZ2fnyyy/9ssJnFwBgTcgKjRWfVxiMCwQFAFgfskJjRVYQRVwgKADAWpEVGiuyghPjAkEBANaNrNBYkRUiFxcICgCwbmSFxoqsoElc8C0AwNqQFRorsgIAoDKyQmNFVgAAVEZWaKzICgCAysgKjRVZAQBQGVmhsSIrAAAqIys0VmQFAEBlZIXGiqwAAKiMrNBYkRUAAJWRFRorsgIAoDKyQmNFVgAAVEZWaKzICgCAynxW+MvfZlQT9fovfklWAADUZLKCnHvOP/ss1Up9/PEN98MDAGDtDg7+D/oViiuORkwbAAAAAElFTkSuQmCC)

**Parent Topic:** [PCB design considerations](https://docs.qualcomm.com/doc/80-PV086-5P/topic/PCB-design-considerations.html)

Last Published: Jul 07, 2023

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