{"id":9723,"date":"2026-07-05T09:43:42","date_gmt":"2026-07-05T09:43:42","guid":{"rendered":"https:\/\/materialparts.com\/mp9840gl\/"},"modified":"2026-07-05T09:43:42","modified_gmt":"2026-07-05T09:43:42","slug":"mp9840gl","status":"publish","type":"post","link":"https:\/\/materialparts.com\/zh\/mp9840gl\/","title":{"rendered":"MP9840GL"},"content":{"rendered":"<h2>\u4ea7\u54c1\u6982\u89c8<\/h2>\n<p>The MP9840GL from Monolithic Power Systems (MPS) is a 36V\/3.5A synchronous step-down converter with ultra-low 2uA quiescent current. It integrates 150m ohm\/90m ohm power MOSFETs and operates at a fixed 500kHz switching frequency with forced PWM or PFM mode for high efficiency across load range. The device comes in a QFN-12 (3x3mm) package.<\/p>\n<h2>\u4e3b\u8981\u89c4\u683c<\/h2>\n<ul>\n<li>Input Voltage: 4.5V to 36V<\/li>\n<li>Output Voltage: 0.8V to 34V (adjustable)<\/li>\n<li>Max Output Current: 3.5A<\/li>\n<li>Quiescent Current: 2uA (PFM mode)<\/li>\n<li>Switching Frequency: 500kHz fixed<\/li>\n<li>R_DS(on) HS: 150m ohm<\/li>\n<li>R_DS(on) LS: 90m ohm<\/li>\n<li>Mode: PFM \/ Forced PWM selectable<\/li>\n<li>V_FB: 0.8V<\/li>\n<li>EN: Active high enable<\/li>\n<li>PG: Power good output<\/li>\n<li>Soft Start: Internal 1ms<\/li>\n<li>Protection: OCP, OVP, UVLO, thermal shutdown<\/li>\n<li>Package: QFN-12 (3x3mm)<\/li>\n<li>Operating Temp: -40C to +125C<\/li>\n<\/ul>\n<h2>\u7279\u70b9<\/h2>\n<ul>\n<li>Ultra-low 2uA quiescent current for long battery life<\/li>\n<li>Integrated 150\/90m ohm MOSFETs reduce BOM<\/li>\n<li>4.5-36V wide input range<\/li>\n<li>3.5A continuous output current<\/li>\n<li>PFM mode for light-load efficiency, FPWM for low ripple<\/li>\n<li>Power good output for sequencing<\/li>\n<li>Hiccup OCP and thermal shutdown protection<\/li>\n<\/ul>\n<h2>\u5e94\u7528<\/h2>\n<ul>\n<li>Industrial 24V bus-powered systems<\/li>\n<li>Battery-powered IoT and wireless devices<\/li>\n<li>Automotive 12V\/24V step-down converters<\/li>\n<li>Distributed power architectures<\/li>\n<li>FPGA\/CPU core voltage regulation<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"<p>Product Overview The MP9840GL from Monolithic Power Systems (MPS) is a 36V\/3.5A synchronous step-down converter with ultra-low 2uA quiescent current. It integrates 150m ohm\/90m ohm power MOSFETs and operates at a fixed 500kHz switching frequency with forced PWM or PFM mode for high efficiency across load range. The device comes in a QFN-12 (3x3mm) package. [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[13,29],"tags":[986],"chip_brand":[172],"class_list":["post-9723","post","type-post","status-publish","format-standard","hentry","category-integrated-circuits-ics","category-power-management-ics-pmic","tag-mp9840gl","chip_brand-mps"],"acf":{"brief_explanation":"36V\/3.5A sync buck converter, 2uA Iq, 500kHz, 150\/90m ohm FETs, QFN-12 3x3mm, -40~125C","date_code":"","package_case":"QFN-12 (3 x 3mm)","in_stock":5022,"datasheet":"https:\/\/www.monolithicpower.cn\/cn\/mp9840.html","price":"$1.50 @ 1ku","product_introduction":"The MP9840GL from MPS is a 36V\/3.5A synchronous buck converter with 2uA quiescent current, integrated 150\/90m ohm MOSFETs, and 500kHz switching in a 3x3mm QFN-12 package.","working_principle":"The MP9840GL uses a current-mode control architecture with integrated high-side (150m ohm) and low-side (90m ohm) MOSFETs. In PFM mode at light loads, the low-side FET is turned off when inductor current reverses, achieving 2uA quiescent current. In FPWM mode, the converter operates continuously for lowest output ripple. The 0.8V feedback reference with external resistor divider sets the output voltage.","pin_description":"<table><tr><th>Pin<\/th><th>Name<\/th><th>Function<\/th><\/tr><tr><td>1<\/td><td>BST<\/td><td>Bootstrap capacitor<\/td><\/tr><tr><td>2<\/td><td>IN<\/td><td>Input supply (4.5-36V)<\/td><\/tr><tr><td>3<\/td><td>EN<\/td><td>Enable (active high)<\/td><\/tr><tr><td>4<\/td><td>FB<\/td><td>Feedback (0.8V ref)<\/td><\/tr><tr><td>5<\/td><td>MODE<\/td><td>PFM\/FPWM mode select<\/td><\/tr><tr><td>6<\/td><td>PG<\/td><td>Power good output<\/td><\/tr><tr><td>7-8<\/td><td>SW<\/td><td>Switch node (inductor)<\/td><\/tr><tr><td>9-10<\/td><td>GND<\/td><td>Power ground<\/td><\/tr><tr><td>11<\/td><td>VCC<\/td><td>Internal 5V LDO output<\/td><\/tr><tr><td>12<\/td><td>NC<\/td><td>No connect<\/td><\/tr><\/table>","application_scenarios":"<ul><li>Industrial 24V bus step-down converter<\/li><li>Battery-powered IoT long-life devices<\/li><li>Automotive 12V\/24V buck converter<\/li><li>FPGA\/CPU core voltage regulator<\/li><\/ul>","alternative_models":"<table><tr><th>Model<\/th><th>Manufacturer<\/th><th>Spec1<\/th><th>Spec2<\/th><\/tr><tr><td>MP8759GD<\/td><td>MPS<\/td><td>18V\/5A<\/td><td>QFN-12<\/td><\/tr><tr><td>TPS54560BDDA<\/td><td>TI<\/td><td>60V\/5A<\/td><td>HSOIC-8<\/td><\/tr><tr><td>LM5164PWPR<\/td><td>TI<\/td><td>100V\/0.5A<\/td><td>HTSSOP-14<\/td><\/tr><\/table>"},"_links":{"self":[{"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/posts\/9723","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/comments?post=9723"}],"version-history":[{"count":0,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/posts\/9723\/revisions"}],"wp:attachment":[{"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/media?parent=9723"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/categories?post=9723"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/tags?post=9723"},{"taxonomy":"chip_brand","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/chip_brand?post=9723"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}