{"id":1292,"date":"2024-04-12T10:36:46","date_gmt":"2024-04-12T02:36:46","guid":{"rendered":"https:\/\/xujiwei.com\/blog\/?p=1292"},"modified":"2024-04-28T23:03:53","modified_gmt":"2024-04-28T15:03:53","slug":"diy101-ldo-dcdc","status":"publish","type":"post","link":"https:\/\/xujiwei.com\/blog\/2024\/04\/diy101-ldo-dcdc\/","title":{"rendered":"\u7535\u5b50 DIY \u5165\u95e8\u77e5\u8bc6\u6574\u7406\uff1a\u7535\u6e90\u82af\u7247 LDO\u3001DC-DC"},"content":{"rendered":"<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_65 ez-toc-wrap-right counter-hierarchy ez-toc-counter ez-toc-light-blue ez-toc-container-direction\">\n<p class=\"ez-toc-title\">\u6587\u7ae0\u76ee\u5f55<\/p>\n<label for=\"ez-toc-cssicon-toggle-item-69de30208a901\" class=\"ez-toc-cssicon-toggle-label\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" 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href=\"https:\/\/xujiwei.com\/blog\/2024\/04\/diy101-ldo-dcdc\/#%E5%89%8D%E8%A8%80\" title=\"\u524d\u8a00\">\u524d\u8a00<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/xujiwei.com\/blog\/2024\/04\/diy101-ldo-dcdc\/#LDO_%E4%BD%8E%E5%8E%8B%E5%B7%AE%E7%A8%B3%E5%8E%8B%E5%99%A8\" title=\"LDO \u4f4e\u538b\u5dee\u7a33\u538b\u5668\">LDO \u4f4e\u538b\u5dee\u7a33\u538b\u5668<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/xujiwei.com\/blog\/2024\/04\/diy101-ldo-dcdc\/#%E7%89%B9%E7%82%B9\" title=\"\u7279\u70b9\">\u7279\u70b9<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/xujiwei.com\/blog\/2024\/04\/diy101-ldo-dcdc\/#%E5%B8%B8%E8%A7%81%E5%B0%81%E8%A3%85\" title=\"\u5e38\u89c1\u5c01\u88c5\">\u5e38\u89c1\u5c01\u88c5<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/xujiwei.com\/blog\/2024\/04\/diy101-ldo-dcdc\/#%E9%80%89%E5%9E%8B\" title=\"\u9009\u578b\">\u9009\u578b<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/xujiwei.com\/blog\/2024\/04\/diy101-ldo-dcdc\/#%E5%B8%B8%E7%94%A8%E5%9E%8B%E5%8F%B7\" title=\"\u5e38\u7528\u578b\u53f7\">\u5e38\u7528\u578b\u53f7<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/xujiwei.com\/blog\/2024\/04\/diy101-ldo-dcdc\/#%E5%85%B8%E5%9E%8B%E5%BA%94%E7%94%A8\" title=\"\u5178\u578b\u5e94\u7528\">\u5178\u578b\u5e94\u7528<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/xujiwei.com\/blog\/2024\/04\/diy101-ldo-dcdc\/#%E6%9B%B4%E5%A4%9A%E9%98%85%E8%AF%BB\" title=\"\u66f4\u591a\u9605\u8bfb\">\u66f4\u591a\u9605\u8bfb<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/xujiwei.com\/blog\/2024\/04\/diy101-ldo-dcdc\/#DC-DC_%E7%9B%B4%E6%B5%81-%E7%9B%B4%E6%B5%81%E8%BD%AC%E6%8D%A2%E5%99%A8\" title=\"DC-DC \u76f4\u6d41-\u76f4\u6d41\u8f6c\u6362\u5668\">DC-DC \u76f4\u6d41-\u76f4\u6d41\u8f6c\u6362\u5668<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/xujiwei.com\/blog\/2024\/04\/diy101-ldo-dcdc\/#%E5%B8%B8%E8%A7%81%E5%B0%81%E8%A3%85-2\" title=\"\u5e38\u89c1\u5c01\u88c5\">\u5e38\u89c1\u5c01\u88c5<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-11\" href=\"https:\/\/xujiwei.com\/blog\/2024\/04\/diy101-ldo-dcdc\/#%E9%80%89%E5%9E%8B-2\" title=\"\u9009\u578b\">\u9009\u578b<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-12\" href=\"https:\/\/xujiwei.com\/blog\/2024\/04\/diy101-ldo-dcdc\/#%E5%B8%B8%E7%94%A8%E5%9E%8B%E5%8F%B7-2\" title=\"\u5e38\u7528\u578b\u53f7\">\u5e38\u7528\u578b\u53f7<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-13\" href=\"https:\/\/xujiwei.com\/blog\/2024\/04\/diy101-ldo-dcdc\/#DC-DC_%E5%BA%94%E7%94%A8\" title=\"DC-DC \u5e94\u7528\">DC-DC \u5e94\u7528<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-14\" href=\"https:\/\/xujiwei.com\/blog\/2024\/04\/diy101-ldo-dcdc\/#%E5%85%B8%E5%9E%8B%E5%BA%94%E7%94%A8-2\" title=\"\u5178\u578b\u5e94\u7528\">\u5178\u578b\u5e94\u7528<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-15\" href=\"https:\/\/xujiwei.com\/blog\/2024\/04\/diy101-ldo-dcdc\/#%E6%9B%B4%E5%A4%9A%E9%98%85%E8%AF%BB-2\" title=\"\u66f4\u591a\u9605\u8bfb\">\u66f4\u591a\u9605\u8bfb<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-16\" href=\"https:\/\/xujiwei.com\/blog\/2024\/04\/diy101-ldo-dcdc\/#%E5%B0%8F%E7%BB%93\" title=\"\u5c0f\u7ed3\">\u5c0f\u7ed3<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-17\" href=\"https:\/\/xujiwei.com\/blog\/2024\/04\/diy101-ldo-dcdc\/#%E7%94%B5%E5%AD%90_DIY_%E5%85%A5%E9%97%A8%E7%9F%A5%E8%AF%86%E7%B3%BB%E5%88%97\" title=\"\u7535\u5b50 DIY \u5165\u95e8\u77e5\u8bc6\u7cfb\u5217\">\u7535\u5b50 DIY \u5165\u95e8\u77e5\u8bc6\u7cfb\u5217<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-18\" href=\"https:\/\/xujiwei.com\/blog\/2024\/04\/diy101-ldo-dcdc\/#%E5%8F%82%E8%80%83%E8%B5%84%E6%96%99\" title=\"\u53c2\u8003\u8d44\u6599\">\u53c2\u8003\u8d44\u6599<\/a><\/li><\/ul><\/nav><\/div>\n<p>\u5728\u5f00\u59cb\u7ee7\u7eed\u5f00\u59cb\u73a9\u7535\u5b50 DIY \u4e4b\u540e\uff0c\u5c31\u9010\u6e10\u8f6c\u5230\u81ea\u5df1\u5236\u4f5c PCB \u5e76\u4e14\u4f7f\u7528\u8d34\u7247\u5143\u4ef6\u4ee3\u66ff\u6a21\u5757\u6765\u5236\u4f5c\u4ea7\u54c1\u4e86\u3002\u4e4b\u524d\u4e00\u76f4\u4f7f\u7528\u7684\u5206\u7acb\u5143\u4ef6\uff0c\u90fd\u662f\u7528\u675c\u90a6\u7ebf\u8fde\u63a5\u5404\u4e2a\u6210\u54c1\u6a21\u5757\uff0c\u5728\u6362\u6210\u8d34\u7247\u5143\u4ef6\u4e4b\u540e\uff0c\u5bf9\u8fd9\u4e9b\u5143\u4ef6\u7684\u5404\u79cd\u5c01\u88c5\u89c4\u683c\u4ec0\u4e48\u7684\u5b8c\u5168\u662f\u4e00\u8138\u8ff7\u7cca\u3002<\/p>\n<p>\u524d\u9762\u4e00\u7bc7 <a href=\"https:\/\/xujiwei.com\/blog\/2024\/03\/diy101-ric\/\">\u300a\u7535\u5b50 DIY \u5165\u95e8\u77e5\u8bc6\u6574\u7406\uff1a\u7535\u963b\u3001\u7535\u5bb9\u3001\u7535\u611f\u300b<\/a> \u4ecb\u7ecd\u4e86\u7535\u963b\u3001\u7535\u5bb9\u3001\u7535\u611f\u7684\u4ecb\u7ecd\u3001\u5c01\u88c5\u548c\u9009\u578b\uff0c\u8fd9\u6b21\u7ee7\u7eed\u6765\u4ecb\u7ecd\u7535\u6e90\u76f8\u5173\u7684\u5185\u5bb9\uff0c\u4e3b\u8981\u662f LDO \u548c DC-DC\uff0c\u5206\u4eab\u7ed9\u540c\u6837\u5f00\u59cb\u60f3\u4f7f\u7528\u8d34\u7247\u5143\u4ef6\u8fdb\u884c\u7535\u5b50 DIY \u7684\u670b\u53cb\u4eec\u3002<\/p>\n<p>PS. \u6211\u4f5c\u4e3a\u4e00\u4e2a\u65b0\u5165\u95e8\u7535\u5b50 DIY \u73a9\u5bb6\uff0c\u4ee5\u4e0b\u90fd\u662f\u4ece\u4e00\u4e2a\u521d\u5b66\u8005\u7684\u89d2\u5ea6\u6574\u7406\u7684\uff0c\u5e76\u4e14\u4e3b\u8981\u4ecb\u7ecd\u6211\u4f7f\u7528\u8fc7\uff0c\u7a0d\u5fae\u4e86\u89e3\u4e00\u70b9\u7684\u5143\u4ef6\uff0c\u5982\u6709\u9519\u8bef\u8fd8\u8bf7\u6307\u6b63\u3002<\/p>\n<h2><span class=\"ez-toc-section\" id=\"%E5%89%8D%E8%A8%80\"><\/span>\u524d\u8a00<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>\u5bf9\u4e8e\u8bbe\u8ba1\u4e00\u4e2a\u7535\u5b50\u7535\u8def\u6765\u8bf4\uff0c\u53ef\u80fd\u4e09\u5206\u4e4b\u4e00\u5de5\u4f5c\u5185\u5bb9\u90fd\u662f\u5728\u786e\u5b9a\u7535\u6e90\u4f9b\u5e94\u3001\u7535\u6e90\u5bf9\u7535\u8def\u7684\u5e72\u6270\u3001\u7535\u6e90\u7684\u7a33\u5b9a\u6027\u7b49\u76f8\u5173\u7684\u5185\u5bb9\u3002<\/p>\n<p>\u5728\u63a5\u89e6\u8fc7\u51e0\u6b3e Linux \u5f00\u53d1\u677f\u7684\u539f\u7406\u56fe\u4ee5\u53ca PCB \u8bbe\u8ba1\u540e\uff0c\u5927\u6982\u603b\u7ed3\u4e86\u4e00\u4e0b\u53d1\u73b0\uff0c\u5176\u5b9e\u8fd9\u4e9b\u5f00\u53d1\u677f\u4e2d\u76f8\u5f53\u4e00\u90e8\u5206\u5185\u5bb9\u90fd\u662f\u8ddf\u7535\u6e90\u76f8\u5173\uff0c\u4f8b\u5982\u5bf9\u4e8e\u7535\u538b\u4f1a\u6709 3.3V\u30012.5V\u30011.8V \u7b49\u4e0d\u540c\u7684\u9700\u8981\uff0c\u5bf9\u4e8e\u6bcf\u4e00\u79cd\u7535\u538b\uff0c\u4e5f\u4f1a\u6709\u4e0d\u540c\u7684\u7535\u6d41\u9700\u6c42\uff0c\u6709\u4e00\u4e9b SoC \u751a\u81f3\u4f1a\u5bf9\u4e0a\u7535\u65f6\u5e8f\u4e5f\u6709\u4e00\u5b9a\u7684\u8981\u6c42\uff0c\u56e0\u6b64\u641e\u5b9a\u7535\u6e90\u7684\u8bbe\u8ba1\u4e4b\u540e\uff0c\u4e00\u822c Linux \u5f00\u53d1\u677f\u4e09\u5206\u4e4b\u4e00\u7684\u5de5\u4f5c\u5df2\u7ecf\u5b8c\u6210\u4e86\u3002<\/p>\n<p>\u5f53\u7136\u5bf9\u4e8e\u7b80\u5355\u7684\u7535\u8def\u6765\u8bf4\uff0c\u57fa\u672c\u4e0a\u53ef\u4ee5 AMS1117 3.3V \u8d70\u5929\u4e0b\uff0c\u5728\u4e00\u4e9b\u7279\u6b8a\u7684\u573a\u5408\u518d\u8003\u8651\u4f7f\u7528 DC-DC \u7535\u8def\u3002<\/p>\n<h2><span class=\"ez-toc-section\" id=\"LDO_%E4%BD%8E%E5%8E%8B%E5%B7%AE%E7%A8%B3%E5%8E%8B%E5%99%A8\"><\/span>LDO \u4f4e\u538b\u5dee\u7a33\u538b\u5668<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>LDO \u4f5c\u4e3a\u5e38\u89c1\u7684\u7535\u6e90\u5668\u4ef6\u5728\u7535\u5b50 DIY \u8fd8\u662f\u5f88\u5e38\u7528\u7684\uff0c\u5f88\u591a MCU \u6216\u8005\u82af\u7247\u7684\u5de5\u4f5c\u7535\u538b\u90fd\u5728 3.3V\uff0c\u5982\u679c\u4f7f\u7528 USB \u6216\u8005\u7535\u6c60\u4f9b\u7535\uff0c\u4e00\u822c\u90fd\u4f1a\u9ad8\u4e8e 3.3V\uff0c\u8fd9\u4e2a\u65f6\u5019\u5c31\u53ef\u4ee5\u4f7f\u7528 LDO \u6765\u4f5c\u4e3a\u964d\u538b\u82af\u7247\u6765\u7ed9\u6574\u4e2a\u7535\u8def\u63d0\u4f9b 3.3V \u7535\u6e90\u4e86\u3002<\/p>\n<blockquote>\n<p>LDO \u4ee3\u8868\u4f4e\u538b\u5dee\u7a33\u538b\u5668\uff08Low-Dropout Regulator\uff09\uff0c\u662f\u4e00\u79cd\u5e38\u89c1\u7684\u7535\u5b50\u5143\u4ef6\uff0c\u7528\u4e8e\u5728\u7535\u8def\u4e2d\u63d0\u4f9b\u7a33\u5b9a\u7684\u7535\u538b\u8f93\u51fa\u3002\u5b83\u662f\u4e00\u79cd\u7ebf\u6027\u7a33\u538b\u5668\uff0c\u7528\u4e8e\u5c06\u9ad8\u8f93\u5165\u7535\u538b\uff08\u901a\u5e38\u6bd4\u6240\u9700\u7684\u8f93\u51fa\u7535\u538b\u9ad8\u5f88\u591a\uff09\u964d\u4f4e\u5230\u6240\u9700\u7684\u7a33\u5b9a\u8f93\u51fa\u7535\u538b\uff0c\u540c\u65f6\u4fdd\u6301\u8f83\u5c0f\u7684\u538b\u5dee\uff08dropout\uff09\u3002<\/p>\n<p>LDO\u901a\u5e38\u7528\u4e8e\u7535\u5b50\u8bbe\u5907\u548c\u7535\u8def\u4e2d\uff0c\u4ee5\u63d0\u4f9b\u7ed9\u654f\u611f\u7684\u96c6\u6210\u7535\u8def\u6216\u6a21\u62df\u7535\u8def\u6240\u9700\u7684\u7a33\u5b9a\u7535\u538b\u3002\u5b83\u4eec\u901a\u8fc7\u5185\u90e8\u53cd\u9988\u673a\u5236\u6765\u8c03\u6574\u5176\u8f93\u51fa\u7535\u538b\uff0c\u4ee5\u62b5\u6d88\u8f93\u5165\u7535\u538b\u53d8\u5316\u548c\u8d1f\u8f7d\u53d8\u5316\u5bf9\u8f93\u51fa\u7684\u5f71\u54cd\uff0c\u4ece\u800c\u4fdd\u6301\u8f93\u51fa\u7535\u538b\u7a33\u5b9a\u3002<\/p>\n<\/blockquote>\n<h3><span class=\"ez-toc-section\" id=\"%E7%89%B9%E7%82%B9\"><\/span>\u7279\u70b9<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>LDO \u4f7f\u7528\u8d77\u6765\u6bd4\u8f83\u7b80\u5355\uff0c\u4e0d\u9700\u8981\u592a\u591a\u5916\u56f4\u5143\u5668\u4ef6\uff0c\u4f8b\u5982\u6211\u5728\u4f7f\u7528 AMS1117 \u65f6\uff0c\u901a\u5e38\u76f4\u63a5\u8f93\u5165\u8f93\u51fa\u5404\u5e76\u8054\u4e00\u4e2a 10uF \u7535\u5bb9\u5b8c\u4e8b\uff0c\u5e76\u4e14\u76f8\u5bf9\u4e8e DC-DC \u6765\u8bf4\uff0cLDO \u8f93\u51fa\u7535\u538b\u7684\u7eb9\u6ce2\u4f1a\u66f4\u5c0f\uff0c\u5bf9\u4e8e\u7535\u8def\u7684\u7a33\u5b9a\u6027\u6765\u8bf4\u4f1a\u6709\u66f4\u597d\u7684\u8868\u73b0\u3002<\/p>\n<p>\u4f46\u662f LDO \u4e5f\u6709\u5b83\u53d7\u9650\u7684\u4e00\u4e9b\u5730\u65b9\uff0c\u4e3b\u8981\u4ee5\u4e0b\u51e0\u70b9\uff1a<\/p>\n<ul>\n<li>LDO \u7684\u5de5\u4f5c\u65b9\u5f0f\u7c7b\u4f3c\u4e8e\u5185\u90e8\u6709\u4e00\u4e2a\u6ed1\u52a8\u7535\u963b\u6765\u8c03\u8282\u8f93\u51fa\u7535\u538b\uff0c\u5bf9\u4e8e\u8f93\u5165\u8f93\u51fa\u538b\u5dee\u7684\u90e8\u5206\u4f1a\u7eaf\u7cb9\u4f5c\u4e3a\u70ed\u91cf\u6d88\u8017\u6389\uff0c\u4f8b\u5982\u5bf9\u4e8e\u4e00\u4e2a LDO \u8f93\u5165 5V \u8f93\u51fa 3.3V\uff0c\u5de5\u4f5c\u7535\u6d41\u5728 1A \u65f6\uff0c\u5b83\u81ea\u8eab\u6d88\u8017\u7684\u529f\u7387\u5c31\u662f <code>1.7 * 1 = 1.7W<\/code>\uff0c\u8fd9\u4e2a\u70ed\u91cf\u662f\u76f8\u5f53\u5927\u7684\u3002<\/li>\n<li>\u7531\u4e8e\u4e0a\u9762\u7684\u9650\u5236\uff0c\u4e00\u822c LDO \u4e0d\u4f1a\u63d0\u4f9b\u592a\u5927\u7684\u7535\u6d41\u8f93\u51fa\u80fd\u529b\uff0c\u4f8b\u5982\u4e00\u822c SOT-223 \u5c01\u88c5\u7684 AMS1117 \u6700\u5927\u7535\u6d41\u8f93\u51fa\u80fd\u529b\u90fd\u4e3a 1A\uff0c\u5982\u679c\u5c01\u88c5\u662f\u66f4\u5c0f\u7684\u5c3a\u5bf8\uff0c\u4f8b\u5982 SOT-23\uff0c\u90a3\u6700\u5927\u7535\u6d41\u8f93\u51fa\u80fd\u529b\u751a\u81f3\u53ef\u80fd\u53ea\u6709 100mA\uff0c\u5982\u679c\u7535\u8def\u4e2d\u9700\u8981\u66f4\u5927\u7684\u7535\u6d41\uff0c\u8fd9\u4e2a\u65f6\u5019\u518d\u4f7f\u7528 LDO \u5c31\u4e0d\u592a\u5408\u9002\u4e86\u3002<\/li>\n<li>\u4e00\u822c\u6765\u8bf4\uff0cLDO \u4e0d\u80fd\u63d0\u4f9b\u592a\u4f4e\u7684\u7535\u538b\uff0c\u4f8b\u5982\u5728\u8bbe\u8ba1 Linux \u5f00\u53d1\u677f\u65f6\uff0c\u6709\u4e9b SoC \u7684\u5185\u5b58\u90e8\u5206\u4f1a\u7528\u5230 0.9V \u7684\u7535\u538b\uff0c\u800c\u4e00\u822c LDO \u6700\u4f4e\u53ef\u4ee5\u8f93\u51fa\u7684\u7535\u538b\u90fd\u6709 1V\uff0c\u56e0\u6b64\u8fd9\u4e2a\u9700\u8981\u5c31\u4e0d\u592a\u9002\u5408\u4f7f\u7528 LDO \u4e86\u3002<\/li>\n<\/ul>\n<h3><span class=\"ez-toc-section\" id=\"%E5%B8%B8%E8%A7%81%E5%B0%81%E8%A3%85\"><\/span>\u5e38\u89c1\u5c01\u88c5<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>LDO \u5e38\u89c1\u7684\u5c01\u88c5\u6709\u4ee5\u4e0b\u51e0\u79cd\uff0c\u4e3b\u8981\u533a\u522b\u5c31\u662f\u5c3a\u5bf8\u4e0d\u4e00\u6837\uff0c\u53e6\u5916\u9664\u4e86\u4ee5\u4e0b\u51e0\u79cd\uff0c\u8fd8\u6709 SOT-23-5 \u5c01\u88c5\u7684\u578b\u53f7\uff0c\u901a\u5e38\u4f1a\u989d\u5916\u5e26\u6709\u4e00\u4e2a EN \u5f15\u811a\uff0c\u7528\u6765\u5f00\u542f\u6216\u8005\u5173\u95ed LDO\u3002<\/p>\n<p><strong>SOT-223<\/strong><\/p>\n<p><img src=\"https:\/\/xujiwei.com\/blog\/wp-content\/uploads\/2024\/04\/diy101-ldo-dcdc-1.jpg\" alt=\"diy101-ldo-dcdc-1\" style=\"zoom:50%;\" \/><\/p>\n<p><strong>SOT-89<\/strong><\/p>\n<p><img src=\"https:\/\/xujiwei.com\/blog\/wp-content\/uploads\/2024\/04\/diy101-ldo-dcdc-2.jpg\" alt=\"diy101-ldo-dcdc-2\" style=\"zoom:50%;\" \/><\/p>\n<p><strong>SOT-23<\/strong><\/p>\n<p><img src=\"https:\/\/xujiwei.com\/blog\/wp-content\/uploads\/2024\/04\/diy101-ldo-dcdc-3.jpg\" alt=\"diy101-ldo-dcdc-3\" style=\"zoom:50%;\" \/><\/p>\n<h3><span class=\"ez-toc-section\" id=\"%E9%80%89%E5%9E%8B\"><\/span>\u9009\u578b<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>\u5bf9\u4e8e LDO \u53ef\u4ee5\u4ece\u4ee5\u4e0b\u51e0\u4e2a\u65b9\u9762\u53bb\u9009\u62e9\u54ea\u4e2a\u578b\u53f7\u6765\u4f7f\u7528\u3002<\/p>\n<p><strong>\u5c01\u88c5<\/strong><\/p>\n<p>SOT-223\u3001SOT-89\u3001SOT-23 \u51e0\u79cd\u5c01\u88c5\u7684\u5927\u5c0f\u90fd\u4e0d\u592a\u4e00\u6837\uff0c\u5728\u5b9e\u9645\u8fdb\u884c PCB \u8bbe\u8ba1\u65f6\uff0c\u9700\u8981\u6839\u636e PCB \u7684\u5c3a\u5bf8\u6765\u9009\u62e9\u5bf9\u5e94\u7684\u578b\u53f7\uff0c\u5982\u679c PCB \u672c\u8eab\u5c3a\u5bf8\u6bd4\u8f83\u5c0f\uff0c\u9009\u62e9 SOT-223 \u5c31\u4e0d\u592a\u5408\u9002\u4e86\u3002<\/p>\n<p>\u4f46\u662f\u5982\u679c\u662f\u624b\u5de5\u710a\u63a5\uff0c\u50cf SOT-23 \u8fd9\u79cd\u5c0f\u5c3a\u5bf8\u53c8\u6bd4\u8f83\u96be\u4ee5\u710a\u63a5\u4e86\uff0c\u56e0\u6b64\u9700\u8981\u6839\u636e\u5b9e\u9645\u60c5\u51b5\u9009\u62e9\uff0c\u6211\u73b0\u5728\u5e38\u7528 SOT-89\uff0c\u5c3a\u5bf8\u5c0f\u4e00\u70b9\u7684\u540c\u65f6\u4e5f\u4fbf\u4e8e\u710a\u63a5\u3002<\/p>\n<p><strong>\u8f93\u5165\u8f93\u51fa\u7535\u538b<\/strong><\/p>\n<p>LDO \u9009\u578b\u6700\u91cd\u8981\u7684\u4e00\u4e2a\u53c2\u6570\u4e3b\u662f\u8f93\u5165\u8f93\u51fa\u7535\u538b\u4e86\uff0c\u4f8b\u5982\u6211\u4eec\u6240\u4f7f\u7528\u7684 MCU \u662f\u4f7f\u7528 3.3V \u4f9b\u7535\u7535\u538b\u7684\uff0c\u90a3\u5c31\u9700\u8981\u4f7f\u7528\u8f93\u51fa\u7535\u538b\u4e3a 3.3V \u7684 LDO\uff0c\u4f8b\u5982\u5e38\u89c1\u7684 AMS1117-3.3\u3002<\/p>\n<p>\u53e6\u5916\u5bf9\u4e8e\u8f93\u5165\u7535\u538b\u4e5f\u9700\u8981\u5173\u6ce8\uff0c\u5982\u679c\u7535\u8def\u662f\u4f7f\u7528 USB \u4f9b\u7535\uff0c\u90a3\u4e48\u4e00\u822c\u90fd\u4e0d\u4f1a\u8d85\u8fc7\u9650\u5236\u7535\u538b\uff0c\u5927\u90e8\u5206 LDO \u90fd\u80fd\u627f\u53d7 6V \u6216\u4ee5\u4e0a\u7684\u8f93\u5165\u7535\u538b\uff0c\u5b8c\u5168\u53ef\u4ee5\u5e94\u4ed8 USB \u7684 5V \u4f9b\u7535\u3002<\/p>\n<p>\u4f46\u662f\u5982\u679c\u7535\u8def\u4e2d\u4f1a\u51fa\u73b0\u9ad8\u7535\u538b\u8f93\u5165\uff0c\u4f8b\u5982\u5728\u505a DIY USB \u7535\u6d41\u8868\u65f6\uff0c\u56e0\u4e3a\u7535\u6e90\u8f93\u5165\u65b9\u5f0f\u4e3a USB PD\uff0c\u53ef\u80fd\u6700\u9ad8\u6709 20V \u7684\u8f93\u5165\u7535\u538b\uff0c\u8fd9\u65f6\u5c31\u9700\u8981\u9009\u62e9\u8f93\u5165\u7535\u538b\u53ef\u4ee5\u6700\u9ad8 20V \u7684\u578b\u53f7\u3002<\/p>\n<p><strong>\u6700\u5927\u8f93\u51fa\u7535\u6d41<\/strong><\/p>\n<p>\u6839\u636e\u7535\u8def\u6574\u4f53\u529f\u8017\u7684\u4e0d\u540c\uff0c\u6211\u4eec\u53ef\u4ee5\u9009\u62e9\u4e0d\u540c\u7684\u6700\u5927\u8f93\u51fa\u7535\u6d41\u7684 LDO\u3002\u4e00\u822c\u6765\u8bf4\uff0c\u8f93\u51fa\u7535\u538b\u4e3a 3.3V\uff0c\u5c01\u88c5\u4e3a SOT-223\u3001SOT-89 \u7684 LDO \u90fd\u53ef\u4ee5\u8f93\u51fa 1A \u7684\u7535\u6d41\uff0c\u800c\u5bf9\u4e8e SOT-23 \u5c01\u88c5\u7684 LDO \u6765\u8bf4\uff0c\u8f93\u51fa\u7535\u6d41\u53ef\u80fd\u5c31\u53ea\u6709 100mA \u4e86\u3002<\/p>\n<p>\u5728 DIY USB \u7535\u6d41\u8868\u9879\u76ee\u4e2d\uff0c\u5c31\u4f7f\u7528\u4e86 SOT-23 \u5c01\u88c5\u7684 LDO\uff0c\u8fd9\u662f\u56e0\u4e3a\u5b83\u540e\u7ea7\u7684\u8d1f\u8f7d\u53ea\u6709 MCU \u548c OLED \u5c4f\u5e55\uff0c\u6574\u4f53\u7535\u6d41\u6d88\u8017\u53ea\u6709 5mA \u5de6\u53f3\uff0cLDO \u7535\u6d41\u8f93\u51fa\u80fd\u529b\u5373\u4f7f\u53ea\u6709 100mA \u4e5f\u5b8c\u5168\u8db3\u591f\u4f7f\u7528\u4e86\u3002<\/p>\n<h3><span class=\"ez-toc-section\" id=\"%E5%B8%B8%E7%94%A8%E5%9E%8B%E5%8F%B7\"><\/span>\u5e38\u7528\u578b\u53f7<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>\u4e00\u822c\u6765\u8bf4\u6211\u5bf9 LDO \u5e76\u4e0d\u4f1a\u592a\u5173\u6ce8\u5177\u4f53\u578b\u53f7\uff0c\u5bf9\u4e8e SOT-223 \u548c SOT-89 \u5c01\u88c5\u7684 LDO \u6765\u8bf4\uff0c\u4e00\u822c\u76f4\u63a5\u641c\u7d22 AMS1117\uff0c\u518d\u6839\u636e\u5c01\u88c5\u7b5b\u9009\u5373\u53ef\uff0c\u5bf9\u4e8e SOT-23 \u5c01\u88c5\u7684 LDO\uff0c\u4e00\u822c\u4e5f\u662f\u641c\u7d22 LDO\uff0c\u518d\u7b5b\u9009\u5c01\u88c5\u3002<\/p>\n<h3><span class=\"ez-toc-section\" id=\"%E5%85%B8%E5%9E%8B%E5%BA%94%E7%94%A8\"><\/span>\u5178\u578b\u5e94\u7528<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>\u5728 <a href=\"https:\/\/xujiwei.com\/blog\/2024\/04\/diy-ambient-light\/\">\u300a30 \u5143 DIY \u4e00\u4e2a\u67d4\u6027\u706f\u4e1d\u6c1b\u56f4\u706f\u300b<\/a> \u9879\u76ee\u4e2d\uff0c\u6211\u5c31\u4f7f\u7528\u4e86\u4e00\u4e2a SOT-89 \u5c01\u88c5\u7684 AMS1117 \u6765\u7ed9\u89e6\u6478\u82af\u7247\u4f9b\u5e94\uff0c\u539f\u7406\u56fe\u975e\u5e38\u7b80\u5355\u3002<\/p>\n<p><img src=\"https:\/\/xujiwei.com\/blog\/wp-content\/uploads\/2024\/04\/diy101-ldo-dcdc-7.png\" alt=\"diy101-ldo-dcdc-7\" style=\"zoom:50%;\" \/><\/p>\n<p>\u5c06\u8f93\u5165\u63a5\u5230 VIN\uff0c\u8f93\u51fa\u5c31\u662f 3.3V\uff0c\u8f93\u5165\u8f93\u51fa\u5404\u5e76\u8054\u4e00\u4e2a 10uF \u7684\u7535\u5bb9\u6765\u6ee4\u6ce2\u3002<\/p>\n<p><img src=\"https:\/\/xujiwei.com\/blog\/wp-content\/uploads\/2024\/04\/diy101-ldo-dcdc-8.png\" alt=\"diy101-ldo-dcdc-8\" style=\"zoom:50%;\" \/><\/p>\n<p>PCB \u5e03\u7ebf\u4e5f\u5f88\u7b80\u5355\uff0c\u7535\u6e90\u8d70\u7ebf\u5c3d\u91cf\u90fd\u4ece\u7535\u5bb9\u8fdb\u7535\u5bb9\u51fa\u5c31\u53ef\u4ee5\u4e86\u3002<\/p>\n<h3><span class=\"ez-toc-section\" id=\"%E6%9B%B4%E5%A4%9A%E9%98%85%E8%AF%BB\"><\/span>\u66f4\u591a\u9605\u8bfb<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>\u53ef\u4ee5\u53c2\u8003\u4ee5\u4e0b\u6587\u7ae0\u6765\u5173\u6ce8 LDO \u9009\u578b\u4e2d\u5176\u4ed6\u53c2\u6570\u7684\u6ce8\u610f\u4e8b\u9879\uff0c\u4f8b\u5982\u566a\u58f0\u6291\u5236\u6bd4\u3001\u9759\u6001\u7535\u6d41\u7b49\u3002<\/p>\n<ul>\n<li><a href=\"https:\/\/www.richtek.com\/selection-guide\/cn\/selection-ldo-criteria.html\">https:\/\/www.richtek.com\/selection-guide\/cn\/selection-ldo-criteria.html<\/a><\/li>\n<\/ul>\n<h2><span class=\"ez-toc-section\" id=\"DC-DC_%E7%9B%B4%E6%B5%81-%E7%9B%B4%E6%B5%81%E8%BD%AC%E6%8D%A2%E5%99%A8\"><\/span>DC-DC \u76f4\u6d41-\u76f4\u6d41\u8f6c\u6362\u5668<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>\u76f8\u6bd4 LDO\uff0cDC-DC \u7684\u4f7f\u7528\u4e0a\u5c31\u8981\u590d\u6742\u4e0d\u5c11\uff0c\u914d\u5957\u7684\u5916\u56f4\u5143\u4ef6\u4e5f\u8981\u591a\u5f88\u591a\u3002<\/p>\n<blockquote>\n<p>DC-DC \u4ee3\u8868\u76f4\u6d41-\u76f4\u6d41\u8f6c\u6362\u5668\uff08DC-to-DC converter\uff09\uff0c\u662f\u4e00\u79cd\u7535\u5b50\u8bbe\u5907\u6216\u7535\u8def\uff0c\u7528\u4e8e\u5c06\u4e00\u4e2a\u76f4\u6d41\u7535\u6e90\u7684\u7535\u538b\u8f6c\u6362\u4e3a\u53e6\u4e00\u4e2a\u76f4\u6d41\u7535\u538b\u7ea7\u522b\u3002\u5b83\u88ab\u5e7f\u6cdb\u7528\u4e8e\u7535\u5b50\u8bbe\u5907\u4e2d\uff0c\u4ee5\u63d0\u4f9b\u9002\u5408\u4e0d\u540c\u7535\u8def\u548c\u7ec4\u4ef6\u7684\u7535\u538b\u6c34\u5e73\u3002<\/p>\n<p>DC-DC\u8f6c\u6362\u5668\u7684\u5de5\u4f5c\u539f\u7406\u662f\u901a\u8fc7\u7535\u5b50\u5143\u4ef6\uff08\u5982\u7535\u611f\u3001\u7535\u5bb9\u548c\u6676\u4f53\u7ba1\uff09\u6765\u8f6c\u6362\u8f93\u5165\u7535\u6e90\u7684\u7535\u538b\u3002\u6839\u636e\u4e0d\u540c\u7684\u8f6c\u6362\u65b9\u5f0f\u548c\u62d3\u6251\u7ed3\u6784\uff0cDC-DC\u8f6c\u6362\u5668\u53ef\u4ee5\u5b9e\u73b0\u5347\u538b\uff08Boost\uff09\u3001\u964d\u538b\uff08Buck\uff09\u3001\u5347\u964d\u538b\uff08Buck-Boost\uff09\u7b49\u4e0d\u540c\u7684\u8f93\u51fa\u7535\u538b\u53d8\u6362\u3002<\/p>\n<\/blockquote>\n<p>\u4f46\u662f\u76f8\u5bf9\u800c\u8a00\uff0cDC-DC \u53ef\u4ee5\u63d0\u4f9b\u66f4\u9ad8\u7684\u7535\u6d41\u8f93\u51fa\u80fd\u529b\uff0c\u5e76\u4e14\u56e0\u4e3a\u5b9e\u9645\u7535\u538b\u8f6c\u6362\u8fc7\u7a0b\u4e2d\uff0c\u4e0d\u4f1a\u6709\u592a\u591a\u7684\u80fd\u91cf\u88ab\u6d88\u8017\u53d8\u6210\u70ed\u91cf\u6563\u5931\uff0c\u6548\u7387\u6bd4 LDO \u8981\u9ad8\u5f88\u591a\uff0c\u4e00\u822c\u60c5\u51b5\u4e0b DC-DC \u7684\u8f6c\u6362\u6548\u7387\u53ef\u4ee5\u8fbe\u5230 90% \u4ee5\u4e0a\u3002<\/p>\n<p>\u4f8b\u5982\u540c\u6837\u5728 5V \u8f6c 3.3V \u8f93\u51fa\u7535\u6d41\u4e3a 1A \u7684\u573a\u5408\u4e2d\uff0cDC-DC \u5982\u679c\u8f6c\u6362\u6548\u7387\u4e3a 90% \u7684\u8bdd\uff0c\u53ef\u4ee5\u8ba4\u4e3a\u53ea\u6709 0.37W \u7684\u529f\u7387\u88ab\u6d88\u8017\u6389\u4e86\uff0c\u4f46\u662f\u540c\u65f6 LDO \u4f1a\u6709 1.7W \u88ab\u53d8\u6210\u70ed\u91cf\u6d88\u8017\u6389\u3002<\/p>\n<p>\u4f46\u662f DC-DC \u7684\u4f7f\u7528\u4e0a\u4e5f\u6bd4 LDO \u590d\u6742\u4e0d\u5c11\uff0c\u5916\u56f4\u5143\u4ef6\u7684\u9009\u578b\u4e5f\u6d89\u53ca\u5230\u5f88\u591a\u53c2\u6570\uff0c\u9700\u8981\u6839\u636e\u5177\u4f53\u60c5\u51b5\u6765\u786e\u5b9a\uff0c\u4f8b\u5982\u7535\u611f\u3001\u7535\u5bb9\u7b49\u3002<\/p>\n<h3><span class=\"ez-toc-section\" id=\"%E5%B8%B8%E8%A7%81%E5%B0%81%E8%A3%85-2\"><\/span>\u5e38\u89c1\u5c01\u88c5<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>\u5bf9\u4e8e\u7535\u5b50 DIY \u4e2d\u7684\u5c0f\u529f\u7387\u7535\u8def\u6765\u8bf4\uff0c\u4e00\u822c\u5e38\u7528\u7684 DC-DC \u5c01\u88c5\u90fd\u4f1a\u662f SOT-23-5\u3001SOP-8 \u8fd9\u79cd\u5c3a\u5bf8\u7684\uff0c\u4e00\u822c\u8f93\u51fa\u7535\u6d41\u80fd\u529b\u4e5f\u53ef\u4ee5\u5230\u8fbe 1A \u6216\u8005\u66f4\u9ad8\uff0c\u5bf9\u4e8e QFN \u5c01\u88c5\u7684 DC-DC \u6765\u8bf4\uff0c\u66f4\u591a\u662f\u4f1a\u63d0\u4f9b\u591a\u8def\u8f93\u51fa\uff0c\u5982\u679c\u7535\u8def\u4e2d\u53ea\u6709\u4e00\u79cd\u7535\u538b\u9700\u6c42\uff0c\u4e00\u822c\u4e5f\u4e0d\u592a\u7528\u5f97\u5230\u3002<\/p>\n<p><strong>SOT-23-5\u3001SOT-23-6<\/strong><\/p>\n<p><img src=\"https:\/\/xujiwei.com\/blog\/wp-content\/uploads\/2024\/04\/diy101-ldo-dcdc-4.jpg\" alt=\"diy101-ldo-dcdc-4\" style=\"zoom:50%;\" \/><\/p>\n<p><strong>SOP-8<\/strong><\/p>\n<p><img src=\"https:\/\/xujiwei.com\/blog\/wp-content\/uploads\/2024\/04\/diy101-ldo-dcdc-5.jpg\" alt=\"diy101-ldo-dcdc-5\" style=\"zoom:50%;\" \/><\/p>\n<p><strong>QFN<\/strong><\/p>\n<p><img src=\"https:\/\/xujiwei.com\/blog\/wp-content\/uploads\/2024\/04\/diy101-ldo-dcdc-6.jpg\" alt=\"diy101-ldo-dcdc-6\" style=\"zoom:50%;\" \/><\/p>\n<h3><span class=\"ez-toc-section\" id=\"%E9%80%89%E5%9E%8B-2\"><\/span>\u9009\u578b<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>DC-DC \u82af\u7247\u7684\u9009\u578b\uff0c\u4e00\u822c\u53ef\u4ee5\u4ece\u529f\u80fd\u7c7b\u578b\u3001\u8f93\u5165\u7535\u538b\u3001\u8f93\u51fa\u7535\u538b\u3001\u8f93\u51fa\u80fd\u529b\u3001\u901a\u9053\u6570\u91cf\u7b49\u65b9\u9762\u8003\u8651\u3002<\/p>\n<p><strong>\u529f\u80fd\u7c7b\u578b<\/strong><\/p>\n<p>DC-DC \u6211\u6700\u5e38\u7528\u7684\u662f\u964d\u538b\u578b\u82af\u7247\uff0c\u5373\u5b83\u53ea\u80fd\u628a\u9ad8\u7535\u538b\u964d\u4f4e\u5230\u4f4e\u7535\u538b\uff0c\u800c\u4e0d\u80fd\u5c06\u4f4e\u7535\u538b\u5347\u9ad8\u5230\u9ad8\u7535\u538b\uff0c\u5728\u5927\u591a\u6570\u573a\u5408\u4e2d\uff0c\u57fa\u672c\u4e0a\u90fd\u662f\u4f7f\u7528\u964d\u538b\u578b DC-DC \u82af\u7247\u5c31\u53ef\u4ee5\u4e86\uff0c\u73b0\u5728\u5927\u591a\u6570\u82af\u7247\u90fd\u5de5\u4f5c\u5728 3.3V \u751a\u81f3\u66f4\u4f4e\u7684 1.8V\u30010.9V\uff0c\u800c\u5728\u4f7f\u7528\u7535\u6c60\u4f9b\u7535\u6216\u8005 USB \u4f9b\u7535\u7684\u7cfb\u7edf\u4e2d\uff0c\u7535\u6c60\u7535\u538b 3.7V\uff0cUSB \u7535\u538b 5V\uff0c\u90fd\u53ea\u9700\u8981\u964d\u538b\u5373\u53ef\u5b8c\u6210\u9700\u6c42\u3002<\/p>\n<p><strong>\u8f93\u5165\u7535\u538b\u3001\u8f93\u51fa\u7535\u538b<\/strong><\/p>\n<p>\u540c\u6837\u62ff\u4e4b\u524d\u505a\u7684 DIY USB \u7535\u6d41\u8868\u4e3a\u4f8b\uff0c\u5728\u4f7f\u7528 DC-DC \u4f9b\u7535\u65f6\uff0c\u4e00\u6837\u9700\u8981\u8003\u8651 DC-DC \u82af\u7247\u6240\u80fd\u627f\u53d7\u7684\u6700\u5927\u8f93\u5165\u7535\u538b\u3002<\/p>\n<p>\u53e6\u5916\uff0c\u5bf9\u4e8e DC-DC \u82af\u7247\u6765\u8bf4\uff0c\u5b83\u7684\u8f93\u51fa\u7535\u538b\u4e00\u822c\u662f\u53ef\u8c03\u7684\uff0c\u53ef\u4ee5\u901a\u8fc7\u8c03\u6574\u53cd\u9988\u7535\u963b\u7684\u963b\u503c\u6bd4\u4f8b\u6765\u8c03\u6574\u6700\u7ec8\u8f93\u51fa\u7535\u538b\u5927\u5c0f\uff0c\u4f46\u662f\u8fd9\u4e2a\u8f93\u51fa\u7535\u538b\u5927\u5c0f\u4e5f\u662f\u6709\u8303\u56f4\u7684\uff0c\u5728\u9009\u62e9\u4e00\u4e2a DC-DC \u82af\u7247\u4e4b\u524d\uff0c\u9700\u8981\u660e\u786e\u6211\u4eec\u9700\u8981\u7684\u7535\u538b\u5728\u5b83\u7684\u8f93\u51fa\u8303\u56f4\u4e4b\u5185\uff0c\u4f8b\u5982\u5f88\u591a DDR \u5185\u5b58\u9700\u8981 0.9V \u7684\u7535\u538b\uff0c\u8fd9\u4e2a\u65f6\u5019\u5982\u679c DC-DC \u82af\u7247\u4e0d\u80fd\u8f93\u51fa\u8fd9\u4e2a\u7535\u538b\u5c31\u9009\u62e9\u5176\u4ed6\u82af\u7247\u4e86\u3002<\/p>\n<p><strong>\u6700\u5927\u7535\u6d41\u8f93\u51fa\u80fd\u529b<\/strong><\/p>\n<p>\u548c LDO \u4e00\u6837\uff0c\u5728\u9009\u62e9 DC-DC \u82af\u7247\u65f6\u4e5f\u9700\u8981\u6ce8\u610f\u5b83\u7684\u6700\u5927\u7535\u6d41\u8f93\u51fa\u80fd\u529b\uff0c\u50cf\u6211\u7ecf\u5e38\u4f7f\u7528\u7684 SY8088AAC\uff0c\u5b83\u7684\u6700\u5927\u7535\u6d41\u8f93\u51fa\u80fd\u529b\u53ef\u4ee5\u5230\u8fbe 1A\uff0c\u4f46\u662f\u5bf9\u4e8e\u540c\u6837 SOT-23-5 \u5c01\u88c5\u7684\u5176\u4ed6 DC-DC \u82af\u7247\u6765\u8bf4\uff0c\u6700\u5927\u7535\u6d41\u8f93\u51fa\u80fd\u529b\u53ef\u80fd\u5c31\u6ca1\u6709\u8fd9\u4e48\u5927\u4e86\uff0c\u9700\u8981\u6839\u636e\u5b9e\u9645\u7535\u8def\u7684\u7535\u6d41\u4f7f\u7528\u60c5\u51b5\u53bb\u9009\u62e9\u5408\u9002\u7684\u578b\u53f7\u3002<\/p>\n<p>\u4e0d\u8fc7\u8fd9\u4e2a\u4e00\u822c\u4e5f\u4e0d\u592a\u4f1a\u6210\u4e3a\u74f6\u9888\uff0c\u50cf\u5e38\u89c1\u7684 ARM SoC \u4f8b\u5982 V3S \u53ef\u80fd\u5cf0\u503c\u529f\u8017\u4e5f\u4e0d\u4f1a\u8d85\u8fc7 500mA\uff0c\u5927\u591a\u6570 DC-DC \u82af\u7247\u8fd8\u662f\u80fd\u6ee1\u8db3\u7684\u3002<\/p>\n<p><strong>\u901a\u9053\u6570\u91cf<\/strong><\/p>\n<p>\u8fd9\u4e2a\u901a\u8fc7\u4f1a\u5728\u8bbe\u8ba1 Linux \u5f00\u53d1\u677f\u7684\u65f6\u5019\u9700\u8981\u8003\u8651\u5230\uff0c\u6216\u8005\u662f\u7efc\u5408\u4e86\u591a\u79cd\u82af\u7247\u7684\u7535\u8def\u4e0a\u9700\u8981\u8003\u8651\uff0c\u4f8b\u5982\u5728\u590d\u523b Miyoo \u6e38\u620f\u673a\u65f6\uff0c\u5c31\u53d1\u73b0 F1C200S \u8fd9\u9897 SoC \u4f1a\u540c\u65f6\u4f7f\u7528\u5230 3.3V\u30012.5V\u30011.2V \u4e09\u79cd\u7535\u538b\uff0c\u5728\u7acb\u521b\u5f00\u6e90\u5e73\u53f0\u4e0a\uff0c\u6211\u590d\u523b\u7684\u5de5\u7a0b\u4f5c\u8005\u662f\u4f7f\u7528\u4e86\u4e09\u9897 SY8088AAC \u6765\u5b8c\u6210\u4e09\u79cd\u7535\u538b\u7684\u964d\u538b\u8f93\u51fa\uff0c\u5982\u679c\u4f7f\u7528\u4e00\u9897\u6709\u4e09\u901a\u9053\u8f93\u51fa\u7684 DC-DC \u82af\u7247\u53ef\u80fd\u4f1a\u66f4\u8282\u7701 PCB \u9762\u79ef\u3002<\/p>\n<h3><span class=\"ez-toc-section\" id=\"%E5%B8%B8%E7%94%A8%E5%9E%8B%E5%8F%B7-2\"><\/span>\u5e38\u7528\u578b\u53f7<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>\u5bf9\u4e8e\u5355\u8def SOT-23-5 \u5c01\u88c5\u7684 DC-DC \u82af\u7247\uff0c\u4e4b\u524d\u7ecf\u5e38\u4f7f\u7528\u7684\u662f SY8088AAC\uff0c\u5e76\u4e14\u5bf9\u4e8e\u8fd9\u4e2a\u5c01\u88c5\uff0c\u6709\u5f88\u591a\u66ff\u4ee3\u578b\u53f7\uff0c\u5e76\u4e14\u662f Pin to Pin \u5bf9\u5e94\uff0c\u53ef\u4ee5\u76f4\u63a5\u66ff\u6362\u4f7f\u7528\u3002<\/p>\n<p>\u5bf9\u4e8e\u591a\u8def\u8f93\u51fa DC-DC \u82af\u7247\uff0c\u6211\u5e38\u7528\u7684\u662f EA3036 \u4ee5\u53ca EA3059 \u4e24\u6b3e\uff0c\u5206\u522b\u5bf9\u5e94 3 \u8def\u8f93\u51fa\u548c 4 \u8def\u8f93\u51fa\uff0c\u5f53\u7136\u5728\u4f7f\u7528\u65f6\u4e5f\u9700\u8981\u6ce8\u610f\u8fd9\u4e24\u9897\u82af\u7247\u7684\u603b\u529f\u7387\u8f93\u51fa\u6709\u4e00\u5b9a\u7684\u9650\u5236\uff0c\u4f8b\u5982\u6bcf\u4e00\u8def\u9650\u5236\u6700\u5927 2A \u4ee5\u53ca\u603b\u529f\u7387\u4e0d\u8d85\u8fc7 10W \u7b49\u3002<\/p>\n<h3><span class=\"ez-toc-section\" id=\"DC-DC_%E5%BA%94%E7%94%A8\"><\/span>DC-DC \u5e94\u7528<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><strong>\u539f\u7406\u56fe\u548c\u5e03\u7ebf<\/strong><\/p>\n<p>DC-DC \u7535\u8def\u4e00\u822c\u90fd\u53ef\u4ee5\u76f4\u63a5\u53c2\u8003\u6570\u636e\u624b\u518c\u4e2d\u7684\u5178\u578b\u5e94\u7528\u6765\u753b\u539f\u7406\u56fe\uff0c\u5e76\u4e14\u6709\u4e9b\u82af\u7247\u8fd8\u4f1a\u63d0\u4f9b\u5e03\u7ebf\u5efa\u8bae\uff0c\u4f8b\u5982\u7535\u611f\u9760\u8fd1\u82af\u7247\u7684 FB \u5f15\u811a\u7b49\u3002<\/p>\n<p><strong>\u5916\u56f4\u5143\u4ef6\u9009\u578b<\/strong><\/p>\n<p>DC-DC \u7535\u8def\u4e00\u822c\u90fd\u9700\u8981\u914d\u5907\u5206\u538b\u53cd\u9988\u7535\u963b\u3001\u7535\u611f\u7b49\u5916\u56f4\u5143\u4ef6\uff0c\u5176\u4e2d\u5206\u538b\u53cd\u9988\u7535\u963b\u51b3\u5b9a\u4e86 DC-DC \u8f93\u51fa\u7684\u7535\u538b\u662f\u591a\u5c11\uff0c\u901a\u5e38\u6570\u636e\u624b\u518c\u4f1a\u7ed9\u51fa\u4e00\u4e9b\u5178\u578b\u5e94\u7528\u7684\u503c\uff0c\u4f8b\u5982\u8f93\u51fa 3.3V\u30012.5V \u65f6\u5206\u538b\u7535\u963b\u7684\u53d6\u503c\u662f\u591a\u5c11\u3002<\/p>\n<p>\u53e6\u5916\u5bf9\u4e8e\u7535\u611f\uff0c\u6570\u636e\u624b\u518c\u4e00\u822c\u4f1a\u7ed9\u51fa\u5efa\u8bae\u53d6\u503c\uff0c\u5e76\u4e14\u4f1a\u6709\u516c\u5f0f\u6765\u8ba1\u7b97\uff0c\u5728\u4e0d\u540c\u8d1f\u8f7d\u4ee5\u53ca\u4e0d\u540c\u5cf0\u503c\u7535\u6d41\u7684\u60c5\u51b5\u4e0b\uff0c\u7535\u611f\u8be5\u5982\u4f55\u53d6\u503c\u3002<\/p>\n<h3><span class=\"ez-toc-section\" id=\"%E5%85%B8%E5%9E%8B%E5%BA%94%E7%94%A8-2\"><\/span>\u5178\u578b\u5e94\u7528<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>\u5728 DIY USB \u7535\u6d41\u8868\u9879\u76ee\u4e2d\uff0c\u6211\u5c31\u4f7f\u7528\u4e00\u4e2a\u5177\u5907\u9ad8\u8f93\u5165\u8010\u538b\u503c\u7684 DC-DC \u82af\u7247 LGS5145\uff0c\u8f93\u5165\u7535\u538b\u6700\u9ad8\u53ef\u8fbe 55V\uff0c\u8db3\u591f PD 2.0 20V \u6700\u5927\u8f93\u5165\u7535\u538b\u4f7f\u7528\u3002<\/p>\n<p>\u5728 LGS5145 \u7684\u6570\u636e\u624b\u518c\u4e2d\u5c31\u63d0\u4f9b\u4e86\u5178\u578b\u5e94\u7528\u7684\u62d3\u6251\u56fe\uff0c\u76f4\u63a5\u6839\u636e\u62d3\u6251\u56fe\u753b\u51fa\u539f\u7406\u56fe\u518d\u5e03\u7ebf\u5c31\u53ef\u4ee5\u5b8c\u6210\u4f7f\u7528\u4e86\u3002<\/p>\n<p><img src=\"https:\/\/xujiwei.com\/blog\/wp-content\/uploads\/2024\/04\/diy101-ldo-dcdc-9.png\" alt=\"diy101-ldo-dcdc-9\" style=\"zoom:50%;\" \/><\/p>\n<p>\u539f\u7406\u56fe\u57fa\u672c\u5c31\u662f\u7167\u642c\u4e86\u62d3\u6251\u56fe\uff0c\u53ea\u4e0d\u8fc7\u8fd9\u91cc\u7684 Rf \u56e0\u4e3a\u624b\u4e0a\u6ca1\u6709 30K \u7684\u7535\u963b\uff0c\u9009\u62e9\u4e86 10K + 20K \u4e32\u8054\u3002\u53ef\u4ee5\u770b\u5230 DC-DC \u7684\u5e94\u7528\u76f8\u6bd4 LDO \u8fd8\u662f\u8981\u590d\u6742\u4e0d\u5c11\u3002<\/p>\n<p><img src=\"https:\/\/xujiwei.com\/blog\/wp-content\/uploads\/2024\/04\/diy101-ldo-dcdc-10.png\" alt=\"diy101-ldo-dcdc-10\" style=\"zoom:50%;\" \/><\/p>\n<p>\u8f6c\u6362\u5230 PCB \u540e\uff0c\u5c31\u53ef\u4ee5\u6839\u636e\u4e00\u4e9b DC-DC \u5e03\u7ebf\u5efa\u8bae\u5b8c\u6210\u5e03\u7ebf\u6765\u4f7f\u7528\u4e86\u3002<\/p>\n<p><img src=\"https:\/\/xujiwei.com\/blog\/wp-content\/uploads\/2024\/04\/diy101-ldo-dcdc-11.png\" alt=\"diy101-ldo-dcdc-11\" style=\"zoom:50%;\" \/><\/p>\n<p>\u76f8\u6bd4 LDO\uff0cDC-DC \u4e00\u822c\u5360\u7528\u7684\u9762\u79ef\u4f1a\u8981\u5927\u4e0a\u4e0d\u5c11\u3002<\/p>\n<h3><span class=\"ez-toc-section\" id=\"%E6%9B%B4%E5%A4%9A%E9%98%85%E8%AF%BB-2\"><\/span>\u66f4\u591a\u9605\u8bfb<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>\u5f53\u7136\uff0cDC-DC \u9009\u578b\u8fd8\u9700\u8981\u8003\u8651\u662f\u5426\u4e3a\u540c\u6b65\u538b\u964d\u3001\u5f00\u5173\u9891\u7387\u3001\u8f6c\u6362\u6548\u7387\u7b49\u5176\u4ed6\u53c2\u6570\uff0c\u4e0d\u8fc7\u5bf9\u4e8e\u4e00\u822c\u7684 DIY \u9879\u76ee\u6765\u8bf4\uff0c\u6682\u65f6\u53ef\u4ee5\u4e0d\u7528\u8003\u8651\u8fd9\u4e9b\uff0c\u66f4\u591a\u5176\u4ed6\u53c2\u6570\u53ef\u4ee5\u53c2\u8003\u7f51\u7edc\u4e0a\u5176\u4ed6\u6587\u7ae0\u6765\u7406\u89e3\u3002<\/p>\n<ul>\n<li><a href=\"https:\/\/www.eet-china.com\/mp\/a37086.html\">https:\/\/www.eet-china.com\/mp\/a37086.html<\/a><\/li>\n<li><a href=\"https:\/\/zhuanlan.zhihu.com\/p\/610791956\">https:\/\/zhuanlan.zhihu.com\/p\/610791956<\/a><\/li>\n<li><a href=\"https:\/\/www.cnblogs.com\/yuanqiangfei\/p\/17285840.html\">https:\/\/www.cnblogs.com\/yuanqiangfei\/p\/17285840.html<\/a><\/li>\n<\/ul>\n<h2><span class=\"ez-toc-section\" id=\"%E5%B0%8F%E7%BB%93\"><\/span>\u5c0f\u7ed3<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>\u7535\u6e90\u662f\u7535\u5b50 DIY \u4e2d\u975e\u5e38\u91cd\u8981\u7684\u4e00\u73af\uff0c\u7406\u89e3\u548c\u641e\u5b9a\u7535\u6e90\u53ef\u80fd\u5c31\u641e\u4e86\u4e09\u5206\u4e4b\u4e00\u7684\u5de5\u4f5c\u3002\u53e6\u5916\u7535\u6e90\u4e00\u6837\u4f1a\u9762\u4e34\u5404\u79cd\u95ee\u9898\uff0c\u4f8b\u5982\u7eb9\u6ce2\u8fc7\u5927\u3001\u7a81\u53d1\u8d1f\u8f7d\u5f15\u8d77\u538b\u964d\u3001\u7535\u611f\u53d1\u70ed\u7b49\u95ee\u9898\uff0c\u8fd9\u4e2a\u5c31\u53ef\u4ee5\u5728 DIY \u4e2d\u8fc7\u7a0b\u4e2d\u6162\u6162\u5b66\u4e60\u4e86 \ud83d\ude03\u3002<\/p>\n<h2><span class=\"ez-toc-section\" id=\"%E7%94%B5%E5%AD%90_DIY_%E5%85%A5%E9%97%A8%E7%9F%A5%E8%AF%86%E7%B3%BB%E5%88%97\"><\/span>\u7535\u5b50 DIY \u5165\u95e8\u77e5\u8bc6\u7cfb\u5217<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<ul>\n<li><a href=\"https:\/\/xujiwei.com\/blog\/2024\/03\/diy101-ric\/\">\u7535\u5b50 DIY \u5165\u95e8\u77e5\u8bc6\u6574\u7406\uff1a\u7535\u963b\u3001\u7535\u5bb9\u3001\u7535\u611f<\/a> <\/li>\n<\/ul>\n<h2><span class=\"ez-toc-section\" id=\"%E5%8F%82%E8%80%83%E8%B5%84%E6%96%99\"><\/span>\u53c2\u8003\u8d44\u6599<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<ul>\n<li><a href=\"https:\/\/xujiwei.com\/blog\/2024\/03\/diy101-ric\/\">https:\/\/xujiwei.com\/blog\/2024\/03\/diy101-ric\/<\/a><\/li>\n<li><a href=\"https:\/\/item.szlcsc.com\/5967328.html\">https:\/\/item.szlcsc.com\/5967328.html<\/a><\/li>\n<li><a href=\"https:\/\/item.szlcsc.com\/5706251.html\">https:\/\/item.szlcsc.com\/5706251.html<\/a><\/li>\n<li><a href=\"https:\/\/item.szlcsc.com\/324036.html\">https:\/\/item.szlcsc.com\/324036.html<\/a><\/li>\n<li><a href=\"https:\/\/www.richtek.com\/selection-guide\/cn\/selection-ldo-criteria.html\">https:\/\/www.richtek.com\/selection-guide\/cn\/selection-ldo-criteria.html<\/a><\/li>\n<li><a href=\"https:\/\/item.szlcsc.com\/80451.html\">https:\/\/item.szlcsc.com\/80451.html<\/a><\/li>\n<li><a href=\"https:\/\/item.szlcsc.com\/6136478.html\">https:\/\/item.szlcsc.com\/6136478.html<\/a><\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>\u5728\u5f00\u59cb\u7ee7\u7eed\u5f00\u59cb\u73a9\u7535\u5b50 DIY \u4e4b\u540e\uff0c\u5c31\u9010\u6e10\u8f6c\u5230\u81ea\u5df1\u5236\u4f5c PCB \u5e76\u4e14\u4f7f\u7528\u8d34\u7247\u5143\u4ef6 &hellip;<\/p>\n<p class=\"read-more\"><a href=\"https:\/\/xujiwei.com\/blog\/2024\/04\/diy101-ldo-dcdc\/\">\u7ee7\u7eed\u9605\u8bfb 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