{"id":6493,"date":"2026-06-17T03:22:42","date_gmt":"2026-06-17T03:22:42","guid":{"rendered":"https:\/\/materialparts.com\/tps2557drbr\/"},"modified":"2026-06-17T03:22:42","modified_gmt":"2026-06-17T03:22:42","slug":"tps2557drbr","status":"publish","type":"post","link":"https:\/\/materialparts.com\/ar\/tps2557drbr\/","title":{"rendered":"TPS2557DRBR"},"content":{"rendered":"<h2>\u0646\u0638\u0631\u0629 \u0639\u0627\u0645\u0629 \u0639\u0644\u0649 \u0627\u0644\u0645\u0646\u062a\u062c<\/h2>\n<p>The TPS2557DRBR from Texas Instruments is a precision adjustable current-limited power-distribution switch with an integrated 22 m\u03a9 N-channel MOSFET. Operating from 2.5V to 6.5V, it supports adjustable current limits from 500 mA to 5 A, making it ideal for USB port protection and other hot-swap applications in an 8-pin VSON (3 x 3 mm) package.<\/p>\n<h2>\u0627\u0644\u0645\u0648\u0627\u0635\u0641\u0627\u062a \u0627\u0644\u0631\u0626\u064a\u0633\u064a\u0629<\/h2>\n<ul>\n<li>Switch Type: N-channel MOSFET, high-side<\/li>\n<li>R_DS(on): 22 m\u03a9 typical<\/li>\n<li>Input Voltage: 2.5V ~ 6.5V<\/li>\n<li>Current Limit: 0.5A ~ 5A (adjustable via R_ILIM)<\/li>\n<li>Current Limit Accuracy: \u00b16.5% at 4.5A<\/li>\n<li>Overcurrent Response: 3.5 \u00b5s typical<\/li>\n<li>Standby Current: 2 \u00b5A max<\/li>\n<li>Enable: Active-high<\/li>\n<li>Fault Output: Open-drain, active-low<\/li>\n<li>UVLO Threshold: 2.35V typical<\/li>\n<li>Built-in Soft Start: Yes<\/li>\n<li>ESD Protection: 15 kV (air gap), 8 kV (contact)<\/li>\n<li>Operating Temperature: -40\u00b0C ~ +125\u00b0C<\/li>\n<li>Package: VSON-8 (3.0 x 3.0 mm, DRB)<\/li>\n<\/ul>\n<h2>\u0627\u0644\u0645\u064a\u0632\u0627\u062a<\/h2>\n<ul>\n<li>Precision adjustable current limit via external resistor<\/li>\n<li>\u00b16.5% current-limit accuracy at high current<\/li>\n<li>Fast 3.5 \u00b5s overcurrent response time<\/li>\n<li>22 m\u03a9 low R_DS(on) MOSFET minimizes voltage drop<\/li>\n<li>Built-in soft start limits inrush current<\/li>\n<li>Thermal cycling protection during sustained overloads<\/li>\n<li>UL listed (File No. E169910)<\/li>\n<li>Fault flag output for overcurrent and overtemperature<\/li>\n<\/ul>\n<h2>\u0627\u0644\u062a\u0637\u0628\u064a\u0642\u0627\u062a<\/h2>\n<ul>\n<li>USB ports and hubs<\/li>\n<li>Digital TVs and set-top boxes<\/li>\n<li>VoIP phones<\/li>\n<li>Hot-plug power distribution<\/li>\n<li>Industrial power switching with current limiting<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"<p>Product Overview The TPS2557DRBR from Texas Instruments is a precision adjustable current-limited power-distribution switch with an integrated 22 m\u03a9 N-channel MOSFET. Operating from 2.5V to 6.5V, it supports adjustable current limits from 500 mA to 5 A, making it ideal for USB port protection and other hot-swap applications in an 8-pin VSON (3 x 3 [&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":[],"chip_brand":[138],"class_list":["post-6493","post","type-post","status-publish","format-standard","hentry","category-integrated-circuits-ics","category-power-management-ics-pmic","chip_brand-ti"],"acf":{"brief_explanation":"Adjustable current-limit power switch, 0.5-5A, 22m\u03a9, 2.5-6.5V, active-high enable, VSON-8 3x3mm","date_code":"","package_case":"VSON-8 (3.0 x 3.0 mm)","in_stock":9200,"datasheet":"https:\/\/www.ti.com\/lit\/ds\/symlink\/tps2556.pdf","price":"$0.48","product_introduction":"The TPS2557DRBR from Texas Instruments is a precision current-limited power-distribution switch designed for applications where accurate current limiting and heavy capacitive load driving are required. The device integrates a 22 m\u03a9 N-channel MOSFET with an internal charge pump, gate driver, current-sense amplifier, and thermal protection in a compact 3 x 3 mm VSON package. The current-limit threshold is programmable from 500 mA to 5 A through a single external resistor on the ILIM pin, with \u00b16.5% accuracy at 4.5 A. The active-high enable and open-drain fault output simplify system integration. The DRBR suffix indicates tape and reel packaging.","working_principle":"The TPS2557DRBR uses an internal charge pump to drive the gate of the N-channel MOSFET above the source voltage, enabling the MOSFET to operate as a high-side switch. The current-sense amplifier monitors the load current and compares it to the programmed threshold set by the R_ILIM resistor. When the load current exceeds the limit, the device transitions from fully-enhanced switch mode to constant-current limiting mode by reducing the gate drive voltage, thereby operating the MOSFET in its linear region. This limits the output current while reducing the output voltage proportionally. If the overload persists and the junction temperature exceeds 135\u00b0C, thermal cycling protection activates, turning off the MOSFET until the junction cools by 20\u00b0C. The built-in soft start controls the output rise time to limit inrush current into capacitive loads. The fault flag (open-drain) asserts low during overcurrent, overtemperature, or undervoltage lockout conditions.","pin_description":"<table><tr><th>Pin<\/th><th>Name<\/th><th>Function<\/th><\/tr><tr><td>1<\/td><td>OUT<\/td><td>Switch output (connects to load)<\/td><\/tr><tr><td>2<\/td><td>OUT<\/td><td>Switch output (connects to load)<\/td><\/tr><tr><td>3<\/td><td>ILIM<\/td><td>Current limit set (connect R_ILIM to GND)<\/td><\/tr><tr><td>4<\/td><td>GND<\/td><td>Ground<\/td><\/tr><tr><td>5<\/td><td>EN<\/td><td>Enable (active high)<\/td><\/tr><tr><td>6<\/td><td>FAULT<\/td><td>Fault output (open-drain, active low)<\/td><\/tr><tr><td>7<\/td><td>IN<\/td><td>Power input (2.5-6.5V)<\/td><\/tr><tr><td>8<\/td><td>IN<\/td><td>Power input (2.5-6.5V)<\/td><\/tr><tr><td>Pad<\/td><td>GND<\/td><td>Thermal pad (connect to GND plane)<\/td><\/tr><\/table>","application_scenarios":"The TPS2557DRBR is the standard choice for USB port power protection in notebooks, desktops, and hubs where its adjustable current limit meets USB 2.0\/3.0 specifications (500 mA or 900 mA). In digital TVs and set-top boxes, it protects downstream ports from short-circuit damage while the fault flag enables system-level fault reporting. For VoIP phones, the 2 \u00b5A standby current minimizes power consumption when the port is disabled. The precision current limiting is also valuable in industrial systems for hot-plug power distribution where boards are inserted into live backplanes. The 15 kV ESD rating provides robust protection against cable discharge events common in user-accessible ports.","alternative_models":"<table><tr><th>Model<\/th><th>Manufacturer<\/th><th>Key Difference<\/th><\/tr><tr><td>TPS2556DRBR<\/td><td>Texas Instruments<\/td><td>Active-low enable version<\/td><\/tr><tr><td>TPS2553DRBR<\/td><td>Texas Instruments<\/td><td>Fixed 1.5A current limit version<\/td><\/tr><tr><td>TPS2065CDBVR<\/td><td>Texas Instruments<\/td><td>1A fixed, SOT-23-6 package<\/td><\/tr><\/table>"},"_links":{"self":[{"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/posts\/6493","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/comments?post=6493"}],"version-history":[{"count":0,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/posts\/6493\/revisions"}],"wp:attachment":[{"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/media?parent=6493"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/categories?post=6493"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/tags?post=6493"},{"taxonomy":"chip_brand","embeddable":true,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/chip_brand?post=6493"}],"curies":[{"name":"\u062f\u0628\u0644\u064a\u0648 \u0628\u064a","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}