{"id":509,"date":"2026-05-17T11:05:12","date_gmt":"2026-05-17T03:05:12","guid":{"rendered":"https:\/\/ezblog.cn\/?p=509"},"modified":"2026-10-17T16:02:49","modified_gmt":"2026-10-17T08:02:49","slug":"ldo-%e8%b4%9f%e8%bd%bd%e7%9e%ac%e6%80%81","status":"publish","type":"post","link":"https:\/\/ezblog.cn\/?p=509","title":{"rendered":"LDO \u8d1f\u8f7d\u77ac\u6001"},"content":{"rendered":"\n<p>\u8d1f\u8f7d\u9636\u8dc3\u671f\u95f4\uff0cLDO\n\u7684\u8f93\u51fa\u7535\u538b\u4f1a\u53d1\u751f\u53d8\u5316\uff0c\u56e0\u4e3a\u5176\u8c03\u6574\u7ba1\u65e0\u6cd5\u77ac\u95f4\u6539\u53d8\u7535\u6d41\u3002\u5728\u8c03\u6574\u7ba1\u54cd\u5e94\u4e4b\u524d\uff0c\u7535\u6d41\u5dee\u989d\u7531\u8f93\u51fa\u7535\u5bb9\u8865\u8db3\u6216\u5438\u6536\u3002\u56e0\u6b64\uff0c\u7535\u538b\u504f\u5dee\u8bb0\u5f55\u7684\u5c31\u662f\u7535\u8377\u7684\u4e0d\u5e73\u8861\u3002<\/p>\n\n<figure><img decoding=\"async\" src=\"https:\/\/ezblog.cn\/wp-content\/uploads\/2026\/10\/02_load_transient.png\" style=\"max-width:100%;height:auto;\" alt=\"\u793a\u610f\u6027\u8d1f\u8f7d\u9636\u8dc3\u54cd\u5e94\uff1a\\(\\Delta t_1\\) \u548c \\(\\Delta t_3\\) \u6807\u8bb0\u73af\u8def\u54cd\u5e94\uff0c\\(\\Delta t_2\\) \u4e3a\u5efa\u7acb\u8fc7\u7a0b\uff0c\\(\\Delta t_4\\) \u4e3a\u5378\u8f7d\u540e\u7684\u653e\u7535\uff1b\u6b64\u56fe\u5e76\u975e\u6309\u6bd4\u4f8b\u7ed8\u5236\u7684\u5b9e\u6d4b\u6ce2\u5f62\u3002\"><figcaption>\u793a\u610f\u6027\u8d1f\u8f7d\u9636\u8dc3\u54cd\u5e94\uff1a<math display=\"inline\" xmlns=\"http:\/\/www.w3.org\/1998\/Math\/MathML\"><semantics><mrow><mi>\u0394<\/mi><msub><mi>t<\/mi><mn>1<\/mn><\/msub><\/mrow><annotation encoding=\"application\/x-tex\">\\Delta t_1<\/annotation><\/semantics><\/math>\n\u548c\n<math display=\"inline\" xmlns=\"http:\/\/www.w3.org\/1998\/Math\/MathML\"><semantics><mrow><mi>\u0394<\/mi><msub><mi>t<\/mi><mn>3<\/mn><\/msub><\/mrow><annotation encoding=\"application\/x-tex\">\\Delta t_3<\/annotation><\/semantics><\/math>\n\u6807\u8bb0\u73af\u8def\u54cd\u5e94\uff0c<math display=\"inline\" xmlns=\"http:\/\/www.w3.org\/1998\/Math\/MathML\"><semantics><mrow><mi>\u0394<\/mi><msub><mi>t<\/mi><mn>2<\/mn><\/msub><\/mrow><annotation encoding=\"application\/x-tex\">\\Delta t_2<\/annotation><\/semantics><\/math>\n\u4e3a\u5efa\u7acb\u8fc7\u7a0b\uff0c<math display=\"inline\" xmlns=\"http:\/\/www.w3.org\/1998\/Math\/MathML\"><semantics><mrow><mi>\u0394<\/mi><msub><mi>t<\/mi><mn>4<\/mn><\/msub><\/mrow><annotation encoding=\"application\/x-tex\">\\Delta t_4<\/annotation><\/semantics><\/math>\n\u4e3a\u5378\u8f7d\u540e\u7684\u653e\u7535\uff1b\u6b64\u56fe\u5e76\u975e\u6309\u6bd4\u4f8b\u7ed8\u5236\u7684\u5b9e\u6d4b\u6ce2\u5f62\u3002<\/figcaption><\/figure>\n\n\n<p>\u5ffd\u7565\u7535\u5bb9\u7684\u4e32\u8054\u7535\u963b\uff0c\u8f93\u51fa\u7aef\u7684\u7535\u6d41\u5e73\u8861\u7ed9\u51fa<\/p>\n<p><math display=\"block\" xmlns=\"http:\/\/www.w3.org\/1998\/Math\/MathML\"><semantics><mrow><msub><mi>C<\/mi><mi>o<\/mi><\/msub><mfrac><mrow><mi>d<\/mi><msub><mi>V<\/mi><mi>o<\/mi><\/msub><\/mrow><mrow><mi>d<\/mi><mi>t<\/mi><\/mrow><\/mfrac><mo>=<\/mo><msub><mi>I<\/mi><mrow><mi mathvariant=\"normal\">p<\/mi><mi mathvariant=\"normal\">a<\/mi><mi mathvariant=\"normal\">s<\/mi><mi mathvariant=\"normal\">s<\/mi><\/mrow><\/msub><mo>\u2212<\/mo><msub><mi>I<\/mi><mrow><mi mathvariant=\"normal\">l<\/mi><mi mathvariant=\"normal\">o<\/mi><mi mathvariant=\"normal\">a<\/mi><mi mathvariant=\"normal\">d<\/mi><\/mrow><\/msub><mo>\u2212<\/mo><msub><mi>I<\/mi><mrow><mi mathvariant=\"normal\">b<\/mi><mi mathvariant=\"normal\">l<\/mi><mi mathvariant=\"normal\">e<\/mi><mi mathvariant=\"normal\">e<\/mi><mi mathvariant=\"normal\">d<\/mi><\/mrow><\/msub><mi>.<\/mi><\/mrow><annotation encoding=\"application\/x-tex\">\nC_o\\frac{dV_o}{dt}=I_{\\mathrm{pass}}-I_{\\mathrm{load}}-I_{\\mathrm{bleed}}.\n<\/annotation><\/semantics><\/math><\/p>\n<p>\u5176\u4e2d\n<math display=\"inline\" xmlns=\"http:\/\/www.w3.org\/1998\/Math\/MathML\"><semantics><msub><mi>I<\/mi><mrow><mi mathvariant=\"normal\">b<\/mi><mi mathvariant=\"normal\">l<\/mi><mi mathvariant=\"normal\">e<\/mi><mi mathvariant=\"normal\">e<\/mi><mi mathvariant=\"normal\">d<\/mi><\/mrow><\/msub><annotation encoding=\"application\/x-tex\">I_{\\mathrm{bleed}}<\/annotation><\/semantics><\/math>\n\u5305\u62ec\u6d41\u8fc7\u53cd\u9988\u5206\u538b\u5668\u6216\u5176\u4ed6\u653e\u7535\u8def\u5f84\u7684\u7535\u6d41\u3002\u8d1f\u8f7d\u7a81\u7136\u589e\u5927\u65f6\uff0c\u7535\u5bb9\u8865\u8db3\u7535\u6d41\u7f3a\u53e3\uff0c\u5176\u7535\u538b\u4e0b\u964d\u3002\u53cd\u9988\u73af\u8def\u68c0\u6d4b\u5230\u8fd9\u4e2a\u8dcc\u843d\u5e76\u589e\u5927\u8c03\u6574\u7ba1\u7535\u6d41\u3002\u5f53\u8c03\u6574\u7ba1\u7535\u6d41\u8d85\u8fc7\u65b0\u7684\u8d1f\u8f7d\u9700\u6c42\u5e76\u5f00\u59cb\u8865\u5145\u635f\u5931\u7684\u7535\u8377\u65f6\uff0c\u6062\u590d\u5f00\u59cb\u3002<\/p>\n<p>\u8fd9\u4e00\u54cd\u5e94\u9700\u8981\u65f6\u95f4\u3002\u73af\u8def\u5e26\u5bbd\u6709\u9650\uff0c\u4e14\u5927\u8c03\u6574\u7ba1\u5b58\u5728\u5fc5\u987b\u5145\u653e\u7535\u7684\u6805\u7535\u5bb9\uff0c\u6709\u9650\u7684\u9a71\u52a8\u7535\u6d41\u4f1a\u9650\u5236\u6805\u7535\u538b\u53d8\u5316\u7684\u901f\u5ea6\u3002\u82e5\u7535\u6d41\u5931\u914d\n<math display=\"inline\" xmlns=\"http:\/\/www.w3.org\/1998\/Math\/MathML\"><semantics><mrow><mi>\u0394<\/mi><mi>I<\/mi><\/mrow><annotation encoding=\"application\/x-tex\">\\Delta I<\/annotation><\/semantics><\/math>\n\u6301\u7eed\u7ea6\n<math display=\"inline\" xmlns=\"http:\/\/www.w3.org\/1998\/Math\/MathML\"><semantics><mrow><mi>\u0394<\/mi><mi>t<\/mi><\/mrow><annotation encoding=\"application\/x-tex\">\\Delta t<\/annotation><\/semantics><\/math>\uff0c\u7535\u5bb9\u7535\u538b\u7684\u53d8\u5316\u7ea6\u4e3a<\/p>\n<p><math display=\"block\" xmlns=\"http:\/\/www.w3.org\/1998\/Math\/MathML\"><semantics><mrow><mrow><mo stretchy=\"true\" form=\"prefix\">|<\/mo><mi>\u0394<\/mi><msub><mi>V<\/mi><mi>o<\/mi><\/msub><mo stretchy=\"true\" form=\"postfix\">|<\/mo><\/mrow><mo>\u2248<\/mo><mfrac><mrow><mi>\u0394<\/mi><mi>I<\/mi><mspace width=\"0.167em\"><\/mspace><mi>\u0394<\/mi><mi>t<\/mi><\/mrow><msub><mi>C<\/mi><mi>o<\/mi><\/msub><\/mfrac><mi>.<\/mi><\/mrow><annotation encoding=\"application\/x-tex\">\n|\\Delta V_o|\\approx\\frac{\\Delta I\\,\\Delta t}{C_o}.\n<\/annotation><\/semantics><\/math><\/p>\n<p>\u5bf9\u4e8e\u540c\u6837\u7684\u7535\u8377\u7f3a\u53e3\uff0c\u66f4\u5927\u7684\u7535\u5bb9\u53ef\u4ee5\u51cf\u5c0f\u504f\u5dee\uff1b\u66f4\u5feb\u7684\u54cd\u5e94\u5219\u4ece\u4e00\u5f00\u59cb\u5c31\u51cf\u5c11\u7535\u8377\u635f\u5931\u3002\u7535\u5bb9\u7684\u4e32\u8054\u7535\u963b\u4f1a\u5728\u4e0a\u8ff0\u5145\u653e\u7535\u54cd\u5e94\u5efa\u7acb\u4e4b\u524d\u5f15\u5165\u4e00\u4e2a\u77ac\u65f6\u7684\u7535\u538b\u9636\u8dc3\u3002<\/p>\n<p>\u8d1f\u8f7d\u7a81\u7136\u51cf\u5c0f\u65f6\uff0c\u7535\u6d41\u4e0d\u5e73\u8861\u7684\u65b9\u5411\u53cd\u8f6c\uff1a\u591a\u4f59\u7684\u8c03\u6574\u7ba1\u7535\u6d41\u7ed9\u7535\u5bb9\u5145\u7535\uff0c\u9020\u6210\u8fc7\u51b2\u3002\u73af\u8def\u53ef\u4ee5\u964d\u4f4e\u8be5\u7535\u6d41\uff0c\u4f46\u53ea\u80fd\u5411\u8d1f\u8f7d\u63d0\u4f9b\u7535\u6d41\u7684\nLDO\n\u65e0\u6cd5\u4e3b\u52a8\u5c06\u8f93\u51fa\u62c9\u4f4e\u3002\u8c03\u6574\u7ba1\u5173\u65ad\u540e\uff0c\u5269\u4f59\u7684\u8d1f\u8f7d\u548c\u53cd\u9988\u5206\u538b\u5668\u5fc5\u987b\u79fb\u9664\u591a\u4f59\u7535\u8377\u3002\u5728\u6781\u8f7b\u8d1f\u8f7d\u4e0b\uff0c\u5373\u4f7f\u53cd\u9988\u73af\u8def\u7a33\u5b9a\uff0c\u4e5f\u4f1a\u51fa\u73b0\u7f13\u6162\u7684\u6062\u590d\u5c3e\u6bb5\u3002<\/p>\n<p>\u56e0\u6b64\u4e24\u4e2a\u65b9\u5411\u9700\u8981\u4e0d\u540c\u7684\u5173\u6ce8\uff1a\u52a0\u8f7d\u8003\u9a8c\u7a33\u538b\u5668\u8865\u5145\u7f3a\u5931\u7535\u6d41\u7684\u901f\u5ea6\uff1b\u5378\u8f7d\u8fd8\u8003\u9a8c\u50a8\u5b58\u7684\u7535\u8377\u662f\u5426\u6709\u6709\u6548\u7684\u653e\u7535\u8def\u5f84\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u8d1f\u8f7d\u9636\u8dc3\u671f\u95f4\uff0cLDO \u7684\u8f93\u51fa\u7535\u538b\u4f1a\u53d1\u751f\u53d8\u5316\uff0c\u56e0\u4e3a\u5176\u8c03\u6574\u7ba1\u65e0\u6cd5\u77ac\u95f4\u6539\u53d8\u7535\u6d41\u3002\u5728\u8c03\u6574\u7ba1\u54cd\u5e94\u4e4b\u524d\uff0c\u7535\u6d41\u5dee\u989d\u7531\u8f93\u51fa\u7535\u5bb9\u8865\u8db3\u6216\u5438\u6536\u3002\u56e0\u6b64\uff0c\u7535\u538b\u504f\u5dee\u8bb0\u5f55\u7684\u5c31\u662f\u7535\u8377\u7684\u4e0d\u5e73\u8861\u3002 \u793a\u610f\u6027\u8d1f\u8f7d\u9636\u8dc3\u54cd\u5e94\uff1a\u0394t1\\Delta&#8230; <a href=\"https:\/\/ezblog.cn\/?p=509\" class=\"readmore\">Read more<span class=\"screen-reader-text\">LDO \u8d1f\u8f7d\u77ac\u6001<\/span><span class=\"fa fa-angle-double-right\" aria-hidden=\"true\"><\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[12],"tags":[],"views":13,"_links":{"self":[{"href":"https:\/\/ezblog.cn\/index.php?rest_route=\/wp\/v2\/posts\/509"}],"collection":[{"href":"https:\/\/ezblog.cn\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/ezblog.cn\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/ezblog.cn\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/ezblog.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=509"}],"version-history":[{"count":2,"href":"https:\/\/ezblog.cn\/index.php?rest_route=\/wp\/v2\/posts\/509\/revisions"}],"predecessor-version":[{"id":534,"href":"https:\/\/ezblog.cn\/index.php?rest_route=\/wp\/v2\/posts\/509\/revisions\/534"}],"wp:attachment":[{"href":"https:\/\/ezblog.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=509"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/ezblog.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=509"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/ezblog.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=509"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}