{"id":511,"date":"2026-05-17T15:25:58","date_gmt":"2026-05-17T07:25:58","guid":{"rendered":"https:\/\/ezblog.cn\/?p=511"},"modified":"2026-10-17T16:03:08","modified_gmt":"2026-10-17T08:03:08","slug":"ldo-%e8%be%93%e5%87%ba%e8%a1%a5%e5%81%bf","status":"publish","type":"post","link":"https:\/\/ezblog.cn\/?p=511","title":{"rendered":"LDO \u8f93\u51fa\u8865\u507f"},"content":{"rendered":"\n<p>LDO\n\u7684\u8f93\u51fa\u7535\u5bb9\u4e0d\u53ea\u662f\u50a8\u5b58\u7535\u8377\u3002\u5b83\u4e0e\u7535\u8def\u4e2d\u7684\u7535\u963b\u5171\u540c\u6539\u53d8\u53cd\u9988\u73af\u8def\u7684\u76f8\u4f4d\u3002\u5728\u67d0\u4e9b\nLDO \u4e2d\uff0c\u7535\u5bb9\u7684\u7b49\u6548\u4e32\u8054\u7535\u963b\uff08ESR\uff09\u63d0\u4f9b\u76f8\u4f4d\u8d85\u524d\uff0c\u5e2e\u52a9\u7ef4\u6301\u73af\u8def\u7a33\u5b9a\u3002<\/p>\n\n<figure><img decoding=\"async\" src=\"https:\/\/ezblog.cn\/wp-content\/uploads\/2026\/10\/03_pmos_ldo_loop.png\" style=\"max-width:100%;height:auto;\" alt=\"PMOS LDO \u53ca\u5176\u8f93\u51fa\u7f51\u7edc\u3002\u6807\u6ce8\u7684\u65ad\u5f00\u5904\u7528\u4e8e\u73af\u8def\u5206\u6790\uff1b\u6b63\u5e38\u5de5\u4f5c\u65f6\u53cd\u9988\u662f\u95ed\u5408\u7684\u3002\u6587\u4e2d\u5355\u7535\u5bb9\u6a21\u578b\u5ffd\u7565\u4e86 \\(C_b\\)\u3002\"><figcaption>PMOS LDO\n\u53ca\u5176\u8f93\u51fa\u7f51\u7edc\u3002\u6807\u6ce8\u7684\u65ad\u5f00\u5904\u7528\u4e8e\u73af\u8def\u5206\u6790\uff1b\u6b63\u5e38\u5de5\u4f5c\u65f6\u53cd\u9988\u662f\u95ed\u5408\u7684\u3002\u6587\u4e2d\u5355\u7535\u5bb9\u6a21\u578b\u5ffd\u7565\u4e86\n<math display=\"inline\" xmlns=\"http:\/\/www.w3.org\/1998\/Math\/MathML\"><semantics><msub><mi>C<\/mi><mi>b<\/mi><\/msub><annotation encoding=\"application\/x-tex\">C_b<\/annotation><\/semantics><\/math>\u3002<\/figcaption><\/figure>\n\n\n<p>\u53cd\u9988\u901a\u8fc7\u7ea0\u6b63\u8f93\u51fa\u7535\u538b\u8bef\u5dee\u5de5\u4f5c\u3002\u6bcf\u4e2a\u6781\u70b9\u90fd\u4f1a\u5f15\u5165\u76f8\u4f4d\u6ede\u540e\uff0c\u4ece\u800c\u5ef6\u8fdf\u8fd9\u79cd\u7ea0\u6b63\u3002\u5982\u679c\u5728\u73af\u8def\u589e\u76ca\u964d\u5230\n1\n\u7684\u9891\u7387\u9644\u8fd1\u7d2f\u79ef\u4e86\u8fc7\u591a\u6ede\u540e\uff0c\u7ea0\u6b63\u672c\u8eab\u5c31\u4f1a\u5f15\u8d77\u632f\u94c3\u751a\u81f3\u4e0d\u7a33\u5b9a\u3002\u8865\u507f\u7684\u4efb\u52a1\u5c31\u662f\u5b89\u6392\u6781\u70b9\u548c\u96f6\u70b9\uff0c\u4f7f\u8be5\u4ea4\u8d8a\u9891\u7387\u5904\u4fdd\u7559\u8db3\u591f\u7684\u76f8\u4f4d\u88d5\u5ea6\u3002<\/p>\n<p>\u8003\u8651\u4e00\u4e2a\u7531\u7535\u5bb9\n<math display=\"inline\" xmlns=\"http:\/\/www.w3.org\/1998\/Math\/MathML\"><semantics><msub><mi>C<\/mi><mi>o<\/mi><\/msub><annotation encoding=\"application\/x-tex\">C_o<\/annotation><\/semantics><\/math>\n\u548c\u6709\u6548\u5c0f\u4fe1\u53f7\u7535\u963b\n<math display=\"inline\" xmlns=\"http:\/\/www.w3.org\/1998\/Math\/MathML\"><semantics><msub><mi>R<\/mi><mi>x<\/mi><\/msub><annotation encoding=\"application\/x-tex\">R_x<\/annotation><\/semantics><\/math>\n\u7ec4\u6210\u7684\u7b80\u5355\u8f93\u51fa\u7f51\u7edc\u3002<math display=\"inline\" xmlns=\"http:\/\/www.w3.org\/1998\/Math\/MathML\"><semantics><msub><mi>R<\/mi><mi>x<\/mi><\/msub><annotation encoding=\"application\/x-tex\">R_x<\/annotation><\/semantics><\/math>\n\u662f\u8c03\u6574\u7ba1\u8f93\u51fa\u7535\u963b\u3001\u53cd\u9988\u5206\u538b\u7535\u963b\u548c\u8d1f\u8f7d\u589e\u91cf\u7535\u963b\u4e09\u8005\u7684\u5e76\u8054\u7b49\u6548\u7535\u963b\u3002\u5ffd\u7565\u8f83\u5c0f\u7684\u5bc4\u751f\u7535\u5bb9\uff0c\u5e76\u5047\u8bbe\nESR \u8fdc\u5c0f\u4e8e\n<math display=\"inline\" xmlns=\"http:\/\/www.w3.org\/1998\/Math\/MathML\"><semantics><msub><mi>R<\/mi><mi>x<\/mi><\/msub><annotation encoding=\"application\/x-tex\">R_x<\/annotation><\/semantics><\/math>\uff0c\u8f93\u51fa\u6781\u70b9\u7ea6\u4e3a<\/p>\n<p><math display=\"block\" xmlns=\"http:\/\/www.w3.org\/1998\/Math\/MathML\"><semantics><mrow><msub><mi>f<\/mi><mrow><mi>p<\/mi><mo>,<\/mo><mi>o<\/mi><\/mrow><\/msub><mo>\u2248<\/mo><mfrac><mn>1<\/mn><mrow><mn>2<\/mn><mi>\u03c0<\/mi><msub><mi>R<\/mi><mi>x<\/mi><\/msub><msub><mi>C<\/mi><mi>o<\/mi><\/msub><\/mrow><\/mfrac><mi>.<\/mi><\/mrow><annotation encoding=\"application\/x-tex\">\nf_{p,o}\\approx\\frac{1}{2\\pi R_xC_o}.\n<\/annotation><\/semantics><\/math><\/p>\n<p>\u7535\u5bb9\u53ca\u5176 ESR \u8fd8\u4ea7\u751f\u4e00\u4e2a\u5de6\u534a\u5e73\u9762\u96f6\u70b9\uff1a<\/p>\n<p><math display=\"block\" xmlns=\"http:\/\/www.w3.org\/1998\/Math\/MathML\"><semantics><mrow><msub><mi>f<\/mi><mrow><mi>z<\/mi><mo>,<\/mo><mrow><mi mathvariant=\"normal\">E<\/mi><mi mathvariant=\"normal\">S<\/mi><mi mathvariant=\"normal\">R<\/mi><\/mrow><\/mrow><\/msub><mo>=<\/mo><mfrac><mn>1<\/mn><mrow><mn>2<\/mn><mi>\u03c0<\/mi><msub><mi>C<\/mi><mi>o<\/mi><\/msub><msub><mi>R<\/mi><mrow><mi mathvariant=\"normal\">E<\/mi><mi mathvariant=\"normal\">S<\/mi><mi mathvariant=\"normal\">R<\/mi><\/mrow><\/msub><\/mrow><\/mfrac><mi>.<\/mi><\/mrow><annotation encoding=\"application\/x-tex\">\nf_{z,\\mathrm{ESR}}=\\frac{1}{2\\pi C_oR_{\\mathrm{ESR}}}.\n<\/annotation><\/semantics><\/math><\/p>\n<p>\u6781\u70b9\u589e\u52a0\u76f8\u4f4d\u6ede\u540e\uff0c\u96f6\u70b9\u589e\u52a0\u76f8\u4f4d\u8d85\u524d\u3002\u5c06\u8be5\u96f6\u70b9\u653e\u7f6e\u5728\u5408\u9002\u4f4d\u7f6e\uff0c\u53ef\u4ee5\u62b5\u6d88\u4ea4\u8d8a\u9644\u8fd1\u53e6\u4e00\u4e2a\u73af\u8def\u6781\u70b9\u5e26\u6765\u7684\u90e8\u5206\u6ede\u540e\u3002\u8fd9\u89e3\u91ca\u4e86\u4e3a\u4ec0\u4e48\nESR \u5e76\u975e\u8d8a\u4f4e\u8d8a\u597d\uff1a\u51cf\u5c0f ESR\n\u4f1a\u4f7f\u96f6\u70b9\u4e0a\u79fb\uff0c\u53ef\u80fd\u628a\u6709\u7528\u7684\u76f8\u4f4d\u8d85\u524d\u4ece\u9700\u8981\u7684\u9891\u6bb5\u79fb\u8d70\u3002<\/p>\n<p>\u8d1f\u8f7d\u7535\u6d41\u53c8\u5e26\u6765\u4e00\u5c42\u590d\u6742\u6027\u3002\u5de5\u4f5c\u70b9\u7684\u53d8\u5316\u4f1a\u6539\u53d8\u8c03\u6574\u7ba1\u7684\u8f93\u51fa\u7535\u963b\uff0c\u4ece\u800c\u4f7f\u8f93\u51fa\u6781\u70b9\u548c\u4ea4\u8d8a\u9891\u7387\u79fb\u52a8\u3002\u7136\u800c\u5728\u7535\u5bb9\u548c\nESR \u56fa\u5b9a\u65f6\uff0cESR\n\u96f6\u70b9\u9891\u7387\u4e0d\u53d8\u3002\u56e0\u6b64\uff0c\u5728\u67d0\u4e00\u8d1f\u8f7d\u4e0b\u6210\u7acb\u7684\u8865\u507f\uff0c\u5fc5\u987b\u5728\u76ee\u6807\u8d1f\u8f7d\u8303\u56f4\u5185\u91cd\u65b0\u9a8c\u8bc1\u3002<\/p>\n<p>\u5b9e\u9645\u9009\u7528\u7684\u7535\u5bb9\u4e0e ESR \u7ec4\u5408\u5e94\u5904\u4e8e\u8be5\u7a33\u538b\u5668\u89c4\u5b9a\u7684\u7a33\u5b9a\u8303\u56f4\u5185\u3002\u4e3a\u4f4e ESR\n\u9676\u74f7\u7535\u5bb9\u8bbe\u8ba1\u7684 LDO \u91c7\u7528\u4e86\u4e0e\u4e4b\u76f8\u9002\u5e94\u7684\u8865\u507f\uff1b\u4f9d\u8d56 ESR\n\u7684\u8bbe\u8ba1\u4e0d\u80fd\u60f3\u5f53\u7136\u5730\u6362\u7528\u540c\u6837\u7684\u7535\u5bb9\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>LDO \u7684\u8f93\u51fa\u7535\u5bb9\u4e0d\u53ea\u662f\u50a8\u5b58\u7535\u8377\u3002\u5b83\u4e0e\u7535\u8def\u4e2d\u7684\u7535\u963b\u5171\u540c\u6539\u53d8\u53cd\u9988\u73af\u8def\u7684\u76f8\u4f4d\u3002\u5728\u67d0\u4e9b LDO \u4e2d\uff0c\u7535\u5bb9\u7684\u7b49\u6548\u4e32\u8054\u7535\u963b\uff08ESR\uff09\u63d0\u4f9b\u76f8\u4f4d\u8d85\u524d\uff0c\u5e2e\u52a9\u7ef4\u6301\u73af\u8def\u7a33\u5b9a\u3002 PMOS LDO \u53ca\u5176\u8f93\u51fa\u7f51\u7edc\u3002\u6807\u6ce8\u7684\u65ad\u5f00\u5904&#8230; <a href=\"https:\/\/ezblog.cn\/?p=511\" class=\"readmore\">Read more<span class=\"screen-reader-text\">LDO \u8f93\u51fa\u8865\u507f<\/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":8,"_links":{"self":[{"href":"https:\/\/ezblog.cn\/index.php?rest_route=\/wp\/v2\/posts\/511"}],"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=511"}],"version-history":[{"count":2,"href":"https:\/\/ezblog.cn\/index.php?rest_route=\/wp\/v2\/posts\/511\/revisions"}],"predecessor-version":[{"id":535,"href":"https:\/\/ezblog.cn\/index.php?rest_route=\/wp\/v2\/posts\/511\/revisions\/535"}],"wp:attachment":[{"href":"https:\/\/ezblog.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=511"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/ezblog.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=511"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/ezblog.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=511"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}