{"id":235402,"date":"2016-01-18T23:00:00","date_gmt":"2016-01-18T23:00:00","guid":{"rendered":"https:\/\/eenewseurope.artwhere.co\/regulateur-ldo-45-v-a-bas-niveau-de-bruit-et-a-decharge-active-de-la-sortie\/"},"modified":"2016-01-18T23:00:00","modified_gmt":"2016-01-18T23:00:00","slug":"regulateur-ldo-45-v-a-bas-niveau-de-bruit-et-a-decharge-active-de-la-sortie","status":"publish","type":"post","link":"https:\/\/www.ecinews.fr\/fr\/regulateur-ldo-45-v-a-bas-niveau-de-bruit-et-a-decharge-active-de-la-sortie\/","title":{"rendered":"R\u00e9gulateur LDO 45 V \u00e0 bas niveau de bruit et \u00e0 d\u00e9charge active de la sortie"},"content":{"rendered":"<p>Ce composant comprend un NMOS interne de for&ccedil;age &agrave; la masse (pull-down) qui d&eacute;charge la tension de sortie si la broche SHDN est &agrave; l&rsquo;&eacute;tat bas ou si la tension d&rsquo;entr&eacute;e est arr&ecirc;t&eacute;e. Cette d&eacute;charge rapide de la tension de sortie contribue &agrave; prot&eacute;ger la charge dans les applications requ&eacute;rant un conditionnement de l&rsquo;alimentation &agrave; la fois au d&eacute;marrage et &agrave; l&rsquo;arr&ecirc;t, comme les capteurs d&rsquo;imagerie haut de gamme.<br \/>\nA partir de la large gamme de tensions d&rsquo;entr&eacute;e de 1,8 V &agrave; 45 V, ce circuit fournit une tension de sortie r&eacute;glable de 0,6 V &agrave; 19 V. Un seul condensateur sur la broche REF\/BYP assure un fonctionnement programmable &agrave; faible niveau de bruit de seulement 25 &micro;V<sub>eff.<\/sub> sur la bande passante 10 Hz &agrave; 100 kHz, et &eacute;galement, la fonctionnalit&eacute; d&rsquo;un d&eacute;marrage progressif de la r&eacute;f&eacute;rence de tension, emp&ecirc;chant les surtensions en sortie &agrave; la mise en marche.<br \/>\nLa tol&eacute;rance sur la tension de sortie atteint une pr&eacute;cision de &plusmn;2% en fonction de la ligne, la charge et la temp&eacute;rature. Un seul condensateur suppl&eacute;mentaire, sur la broche INFILT, am&eacute;liore le PSRR de 15 dB &agrave; 20 dB, pour les fr&eacute;quences de 20 kHz &agrave; 1 MHz, avec un PSRR atteignant 60 dB &agrave; 1 MHz.<\/p>\n<p>Ce r&eacute;gulateur fonctionne avec un tr&egrave;s petit condensateur de 3,3 &micro;F en sortie, &agrave; di&eacute;lectrique c&eacute;ramique et de faible co&ucirc;t, optimisant la stabilit&eacute; et la r&eacute;ponse aux transitoires. Un indicateur de tension &eacute;tablie PWRGD renseigne sur l&rsquo;&eacute;tat de r&eacute;gulation de la tension de sortie. Une r&eacute;sistance assure la programmation de la pr&eacute;cision de la limite du courant externe, jusqu&rsquo;&agrave; &plusmn;10% sur la gamme de temp&eacute;rature. Ses caract&eacute;ristiques suppl&eacute;mentaires incluent une protection contre une tension inverse de batterie, une autre en cas de courant inverse, un circuit de limitation du courant par repliement de caract&eacute;ristique et une limitation thermique.\n<\/p>\n<hr \/>\n<p>Avec ses gammes &eacute;tendues de tensions d&rsquo;entr&eacute;e et de sortie, sa r&eacute;ponse rapide aux transitoires, son faible courant de repos de 64 &micro;A en fonctionnement et inf&eacute;rieur &agrave; 2 &micro;A &agrave; l&rsquo;arr&ecirc;t, ce r&eacute;gulateur convient particuli&egrave;rement pour les alimentations de l&rsquo;industrie, de l&rsquo;avionique, de l&rsquo;automobile et les syst&egrave;mes et instruments aliment&eacute;s sur batterie requ&eacute;rant une autonomie optimum. Il est &eacute;galement bien adapt&eacute; pour les alimentations de puissance de grande fiabilit&eacute; requ&eacute;rant une protection plus grande.<br \/>\nPropos&eacute;es en bo&icirc;tiers DFN 12 broches, de 3 x 4mm, et MSOP-12, les deux &agrave; performance thermique renforc&eacute;e et empreinte compacte, les versions de classes E et I de ce composant offrent une temp&eacute;rature de jonction de -40 &deg;C &agrave; +125 &deg;C. <\/p>\n<\/p>\n<p><a href=\"http:\/\/www.linear.com\/product\/LT3066\" target=\"_blank\" title=\"www.linear.com\/product\/LT3066\" rel=\"noopener\">www.linear.com\/product\/LT3066<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>En plus d\u2019une limite de courant programmable et d\u2019une d\u00e9charge active de tension  en sortie, le r\u00e9gulateur lin\u00e9aire de tension \u00e9lev\u00e9e LT3066 de Linear Technology offre un bas niveau de bruit, un indicateur de tension r\u00e9gul\u00e9e et la possibilit\u00e9 d\u2019am\u00e9liorer le taux de r\u00e9jection de l\u2019alimentation (PSRR). Il g\u00e9n\u00e8re jusqu\u2019\u00e0 500 mA en sortie avec une faible tension de d\u00e9chet de 300 mV \u00e0 pleine charge. <\/p>\n","protected":false},"author":22,"featured_media":235403,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[881],"tags":[],"domains":[47],"ppma_author":[1149],"class_list":["post-235402","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-nouveaux-produits","domains-electronique-eci"],"acf":[],"yoast_head":"<title>R\u00e9gulateur LDO 45 V \u00e0 bas niveau de bruit et \u00e0 d\u00e9charge act...<\/title>\n<meta name=\"description\" content=\"En plus d\u2019une limite de courant programmable et d\u2019une d\u00e9charge active de tension  en sortie, le r\u00e9gulateur lin\u00e9aire de tension \u00e9lev\u00e9e LT3066 de...\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.ecinews.fr\/fr\/wp-json\/wp\/v2\/posts\/235402\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"R\u00e9gulateur LDO 45 V \u00e0 bas niveau de bruit et \u00e0 d\u00e9charge active de la sortie\" \/>\n<meta property=\"og:description\" content=\"En plus d\u2019une limite de courant programmable et d\u2019une d\u00e9charge active de tension en sortie, le r\u00e9gulateur lin\u00e9aire de tension \u00e9lev\u00e9e LT3066 de Linear Technology offre un bas niveau de bruit, un indicateur de tension r\u00e9gul\u00e9e et la possibilit\u00e9 d\u2019am\u00e9liorer le taux de r\u00e9jection de l\u2019alimentation (PSRR). 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