{"id":8429,"date":"2026-06-29T00:47:46","date_gmt":"2026-06-29T00:47:46","guid":{"rendered":"https:\/\/materialparts.com\/tps2553dbvr\/"},"modified":"2026-06-29T00:47:46","modified_gmt":"2026-06-29T00:47:46","slug":"tps2553dbvr","status":"publish","type":"post","link":"https:\/\/materialparts.com\/zh\/tps2553dbvr\/","title":{"rendered":"TPS2553DBVR"},"content":{"rendered":"<h2>\u4ea7\u54c1\u6982\u89c8<\/h2>\n<p>The TPS2553DBVR from Texas Instruments is a precision adjustable current-limited power distribution switch in a SOT-23-6 package. It provides up to 1.5 A continuous load current with programmable current limit from 75 mA to 1.7 A via an external resistor, featuring 85 m\u03a9 on-resistance, reverse voltage protection, and constant-current limiting during overcurrent conditions.<\/p>\n<h2>\u4e3b\u8981\u89c4\u683c<\/h2>\n<ul>\n<li>Operating Voltage: 2.5 V to 6.5 V<\/li>\n<li>Maximum Load Current: 1.5 A<\/li>\n<li>Current Limit Range: 75 mA to 1700 mA (adjustable)<\/li>\n<li>Current Limit Accuracy: \u00b16% at 1.7 A<\/li>\n<li>On-Resistance: 85 m\u03a9<\/li>\n<li>Overcurrent Response: 2 \u00b5s (typ)<\/li>\n<li>Active-High Enable Input<\/li>\n<li>FAULT Open-Drain Output<\/li>\n<li>Operating Temperature: -40\u00b0C to +125\u00b0C<\/li>\n<li>Package: SOT-23-6 (DBV), MSL 1<\/li>\n<\/ul>\n<h2>\u7279\u70b9<\/h2>\n<ul>\n<li>Constant-current limiting during overload<\/li>\n<li>Reverse input-output voltage protection<\/li>\n<li>Built-in soft start<\/li>\n<li>15 kV ESD protection per IEC 61000-4-2<\/li>\n<li>UL listed (File No. E169910)<\/li>\n<li>Backwards compatible with TPS2550\/51<\/li>\n<\/ul>\n<h2>\u5e94\u7528<\/h2>\n<ul>\n<li>USB port power protection<\/li>\n<li>Hot-plug power supply protection<\/li>\n<li>Notebook and desktop USB ports<\/li>\n<li>Industrial load switches<\/li>\n<li>Consumer electronics power distribution<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"<p>Product Overview The TPS2553DBVR from Texas Instruments is a precision adjustable current-limited power distribution switch in a SOT-23-6 package. It provides up to 1.5 A continuous load current with programmable current limit from 75 mA to 1.7 A via an external resistor, featuring 85 m\u03a9 on-resistance, reverse voltage protection, and constant-current limiting during overcurrent conditions. [&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":[19,13],"tags":[],"chip_brand":[138],"class_list":["post-8429","post","type-post","status-publish","format-standard","hentry","category-analog-linear-ics","category-integrated-circuits-ics","chip_brand-ti"],"acf":{"brief_explanation":"0.075-1.7A adj current limit, 85m\u03a9, 2.5-6.5V USB power switch, SOT-23-6","date_code":"","package_case":"SOT-23-6 (DBV) (2.90 \u00d7 2.80 \u00d7 1.45 mm)","in_stock":5657,"datasheet":"https:\/\/www.ti.com\/lit\/ds\/symlink\/tps2553.pdf","price":"$0.36 @ 1ku","product_introduction":"The TPS2553DBVR is a precision adjustable current-limited power distribution switch from Texas Instruments designed for applications requiring accurate current limiting or protection against heavy capacitive loads and short circuits. The device provides up to 1.5 A of continuous load current with a programmable current-limit threshold from 75 mA to 1.7 A via a single external resistor. Current-limit accuracy of \u00b16% is achieved at the higher current settings. The 85 m\u03a9 high-side N-channel MOSFET switch features built-in soft start to minimize inrush current surges. During overcurrent conditions, the device limits output current to a safe level in constant-current mode. A reverse-voltage comparator disables the switch when the output voltage exceeds the input, providing bidirectional protection. The FAULT open-drain output indicates overcurrent and reverse-voltage events.","working_principle":"The TPS2553 uses an internal charge pump to drive the gate of an 85 m\u03a9 N-channel MOSFET above the source voltage, enabling the high-side switch to operate from input voltages as low as 2.5 V. The current-sense amplifier monitors the load current through the MOSFET. When the current exceeds the programmed threshold (set by the ILIM resistor), the device enters constant-current mode by reducing the gate drive to limit the output current. The response time is approximately 2 \u00b5s. Reverse voltage protection is implemented by a comparator that monitors VOUT vs VIN; when VOUT exceeds VIN, the MOSFET is turned off to prevent reverse current flow. The FAULT open-drain output is asserted low during both overcurrent and reverse-voltage conditions. Soft start ramps the output voltage gradually during turn-on to minimize inrush current into capacitive loads.","pin_description":"<table border=\"1\"><tr><th>Pin<\/th><th>Name<\/th><th>Description<\/th><\/tr><tr><td>1<\/td><td>OUT<\/td><td>Switch Output (to load)<\/td><\/tr><tr><td>2<\/td><td>GND<\/td><td>Ground<\/td><\/tr><tr><td>3<\/td><td>ILIM<\/td><td>Current Limit Set Resistor (to GND)<\/td><\/tr><tr><td>4<\/td><td>UVLO\/EN<\/td><td>Undervoltage Lockout \/ Enable Input<\/td><\/tr><tr><td>5<\/td><td>FAULT<\/td><td>Fault Indicator Output (Open-Drain, Active Low)<\/td><\/tr><tr><td>6<\/td><td>IN<\/td><td>Switch Input (2.5-6.5 V supply)<\/td><\/tr><\/table>","application_scenarios":"<ul><li><b>USB Port Protection<\/b>: Precision 500 mA \/ 900 mA current limiting for USB 2.0\/3.0 host ports with IEC 61000-4-2 ESD protection<\/li><li><b>Hot-Plug Power Supplies<\/b>: Inrush current limiting for PCIe, SATA, and other hot-swap interfaces<\/li><li><b>Industrial Load Switches<\/b>: Adjustable current limit from 75 mA to 1.7 A for various peripheral power rails<\/li><li><b>Battery-Powered Devices<\/b>: Reverse current blocking protects battery when output is driven above input<\/li><li><b>Multi-Port Hubs<\/b>: Individual port current limiting prevents single fault from affecting other ports<\/li><\/ul>","alternative_models":"<table border=\"1\"><tr><th>Model<\/th><th>Brand<\/th><th>ILIM (A)<\/th><th>Ron (m\u03a9)<\/th><th>Package<\/th><\/tr><tr><td>TPS2552DBVR<\/td><td>TI<\/td><td>0.075-1.7<\/td><td>85<\/td><td>SOT-23-6<\/td><\/tr><tr><td>TPS2551DBVR<\/td><td>TI<\/td><td>0.5-1.2<\/td><td>85<\/td><td>SOT-23-6<\/td><\/tr><tr><td>TPS22944<\/td><td>TI<\/td><td>Fixed 0.9<\/td><td>40<\/td><td>SOT-23-6<\/td><\/tr><tr><td>MAX14572<\/td><td>Maxim<\/td><td>0.2-2.0<\/td><td>70<\/td><td>TDFN-6<\/td><\/tr><tr><td>NCP380<\/td><td>onsemi<\/td><td>0.1-2.1<\/td><td>50<\/td><td>DFN-6<\/td><\/tr><\/table>"},"_links":{"self":[{"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/posts\/8429","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=8429"}],"version-history":[{"count":0,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/posts\/8429\/revisions"}],"wp:attachment":[{"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/media?parent=8429"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/categories?post=8429"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/tags?post=8429"},{"taxonomy":"chip_brand","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/chip_brand?post=8429"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}